Add back missing YAML_CPP_API.

This reverts commit 0733aeb451.

.clang-format

@@ -30,7 +30,7 @@ PenaltyReturnTypeOnItsOwnLine: 200
 PointerBindsToType: true
 SpacesBeforeTrailingComments: 2
 Cpp11BracedListStyle: true
-Standard:        Auto
+Standard:        Cpp11
 IndentWidth:     2
 TabWidth:        8
 UseTab:          Never

.codedocs

@@ -0,0 +1,50 @@
+# CodeDocs.xyz Configuration File
+
+# Optional project name, if left empty the GitHub repository name will be used.
+PROJECT_NAME =
+
+# One or more directories and files that contain example code to be included.
+EXAMPLE_PATH =
+
+# One or more directories and files to exclude from documentation generation.
+# Use relative paths with respect to the repository root directory.
+EXCLUDE = test/gtest-1.8.0/
+
+# One or more wildcard patterns to exclude files and directories from document
+# generation.
+EXCLUDE_PATTERNS =
+
+# One or more symbols to exclude from document generation. Symbols can be
+# namespaces, classes, or functions.
+EXCLUDE_SYMBOLS =
+
+# Override the default parser (language) used for each file extension.
+EXTENSION_MAPPING =
+
+# Set the wildcard patterns used to filter out the source-files.
+# If left blank the default is:
+# *.c, *.cc, *.cxx, *.cpp, *.c++, *.java, *.ii, *.ixx, *.ipp, *.i++, *.inl,
+# *.idl, *.ddl, *.odl, *.h, *.hh, *.hxx, *.hpp, *.h++, *.cs, *.d, *.php,
+# *.php4, *.php5, *.phtml, *.inc, *.m, *.markdown, *.md, *.mm, *.dox, *.py,
+# *.f90, *.f, *.for, *.tcl, *.vhd, *.vhdl, *.ucf, *.qsf, *.as and *.js.
+FILE_PATTERNS =
+
+# Hide undocumented class members.
+HIDE_UNDOC_MEMBERS =
+
+# Hide undocumented classes.
+HIDE_UNDOC_CLASSES =
+
+# Specify a markdown page whose contents should be used as the main page
+# (index.html). This will override a page marked as \mainpage. For example, a
+# README.md file usually serves as a useful main page.
+USE_MDFILE_AS_MAINPAGE = README.md
+
+# Specify external repository to link documentation with.
+# This is similar to Doxygen's TAGFILES option, but will automatically link to
+# tags of other repositories already using CodeDocs. List each repository to
+# link with by giving its location in the form of owner/repository.
+# For example:
+#   TAGLINKS = doxygen/doxygen CodeDocs/osg
+# Note: these repositories must already be built on CodeDocs.
+TAGLINKS =

.github/workflows/build.yml

@@ -0,0 +1,40 @@
+name: Github PR
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+  workflow_dispatch:
+jobs:
+  build:
+      strategy:
+        matrix:
+          os: [ubuntu-latest, windows-latest, macos-latest]
+      runs-on: ${{ matrix.os }}
+      steps:
+        - uses: actions/checkout@v2
+
+        - name: Build static
+          shell: bash
+          run: |
+            mkdir -p build && cd build
+            cmake ..
+            cmake --build . --parallel 4
+
+        - name: Test static
+          shell: bash
+          run: cd build && ctest --output-on-failure
+
+        - name: Build shared
+          shell: bash
+          run: |
+            rm -rf build && mkdir -p build && cd build
+            cmake .. -DYAML_BUILD_SHARED_LIBS=ON
+            cmake --build . --parallel 4
+
+          # tests are failing for unknown reasons
+        - if: matrix.os == 'ubuntu-latest'
+          name: Test shared
+          shell: bash
+          run: cd build && ctest --output-on-failure
+          # test all ASAP

.gitignore

@@ -0,0 +1,3 @@
+build/
+/tags
+/bazel-*

.hgeol

@@ -1,4 +0,0 @@
-**.h = native
-**.c = native
-**.cpp = native
-**.txt = native

.hgignore

@@ -1 +0,0 @@
-syntax: glob

.travis.yml

@@ -0,0 +1,37 @@
+language: c++
+
+matrix:
+  include:
+    - os: linux
+      compiler: gcc
+    - os: osx
+      compiler: clang
+    - os: osx
+      compiler: gcc
+env:
+  - CTEST_OUTPUT_ON_FAILURE=1
+
+before_script:
+  - mkdir build
+  - cd build
+  - cmake ..
+  - cd ..
+script:
+  - cmake --build build
+  - cmake --build build --target test
+
+addons:
+  apt:
+    sources:
+    - ubuntu-toolchain-r-test
+    - llvm-toolchain-precise-3.9
+    packages:
+    - g++-4.9
+    - clang-3.9
+    update: true
+  homebrew:
+    packages:
+    - ccache
+    - gcc@4.9
+    - llvm@4
+    update: true

BUILD.bazel

@@ -0,0 +1,14 @@
+cc_library(
+    name = "yaml-cpp_internal",
+    visibility = ["//:__subpackages__"],
+    strip_include_prefix = "src",
+    hdrs = glob(["src/**/*.h"]),
+)
+
+cc_library(
+    name = "yaml-cpp",
+    visibility = ["//visibility:public"],
+    includes = ["include"],
+    hdrs = glob(["include/**/*.h"]),
+    srcs = glob(["src/**/*.cpp", "src/**/*.h"]),
+)

CMakeLists.txt

@@ -1,340 +1,174 @@
-###
-### CMake settings
-###
-## Due to Mac OSX we need to keep compatibility with CMake 2.6
-# see http://www.cmake.org/Wiki/CMake_Policies
-cmake_minimum_required(VERSION 2.6)
-# see http://www.cmake.org/cmake/help/cmake-2-8-docs.html#policy:CMP0012
-if(POLICY CMP0012)
-	cmake_policy(SET CMP0012 OLD)
-endif()
-# see http://www.cmake.org/cmake/help/cmake-2-8-docs.html#policy:CMP0015
-if(POLICY CMP0015)
-	cmake_policy(SET CMP0015 OLD)
+# 3.5 is actually available almost everywhere, but this a good minimum
+cmake_minimum_required(VERSION 3.4)
+
+# enable MSVC_RUNTIME_LIBRARY target property
+# see https://cmake.org/cmake/help/latest/policy/CMP0091.html
+if(POLICY CMP0091)
+  cmake_policy(SET CMP0091 NEW)
 endif()
 
+project(YAML_CPP VERSION 0.7.0 LANGUAGES CXX)
+
+include(CMakePackageConfigHelpers)
+include(CMakeDependentOption)
 include(CheckCXXCompilerFlag)
+include(GNUInstallDirs)
+include(CTest)
 
+find_program(YAML_CPP_CLANG_FORMAT_EXE NAMES clang-format)
 
-###
-### Project settings
-###
-project(YAML_CPP)
+option(YAML_CPP_BUILD_CONTRIB "Enable yaml-cpp contrib in library" ON)
+option(YAML_CPP_BUILD_TOOLS "Enable parse tools" ON)
+option(YAML_BUILD_SHARED_LIBS "Build yaml-cpp shared library" ${BUILD_SHARED_LIBS})
 
-set(YAML_CPP_VERSION_MAJOR "0")
-set(YAML_CPP_VERSION_MINOR "5")
-set(YAML_CPP_VERSION_PATCH "2")
-set(YAML_CPP_VERSION "${YAML_CPP_VERSION_MAJOR}.${YAML_CPP_VERSION_MINOR}.${YAML_CPP_VERSION_PATCH}")
+cmake_dependent_option(YAML_CPP_BUILD_TESTS
+  "Enable yaml-cpp tests" ON
+  "BUILD_TESTING;CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR" OFF)
+cmake_dependent_option(YAML_CPP_INSTALL
+  "Enable generation of yaml-cpp install targets" ON
+  "CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR" OFF)
+cmake_dependent_option(YAML_MSVC_SHARED_RT
+  "MSVC: Build yaml-cpp with shared runtime libs (/MD)" ON
+  "MSVC" OFF)
 
-enable_testing()
-
-
-###
-### Project options
-###
-## Project stuff
-option(YAML_CPP_BUILD_TOOLS "Enable testing and parse tools" ON)
-option(YAML_CPP_BUILD_CONTRIB "Enable contrib stuff in library" ON)
-
-## Build options
-# --> General
-# see http://www.cmake.org/cmake/help/cmake2.6docs.html#variable:BUILD_SHARED_LIBS
-#     http://www.cmake.org/cmake/help/cmake2.6docs.html#command:add_library
-option(BUILD_SHARED_LIBS "Build Shared Libraries" OFF)
-
-# --> Apple
-option(APPLE_UNIVERSAL_BIN "Apple: Build universal binary" OFF)
-
-# --> Microsoft Visual C++
-# see http://msdn.microsoft.com/en-us/library/aa278396(v=VS.60).aspx
-#     http://msdn.microsoft.com/en-us/library/2kzt1wy3(v=VS.71).aspx
-option(MSVC_SHARED_RT "MSVC: Build with shared runtime libs (/MD)" ON)
-option(MSVC_STHREADED_RT "MSVC: Build with single-threaded static runtime libs (/ML until VS .NET 2003)" OFF)
-
-###
-### Sources, headers, directories and libs
-###
-
-# From http://www.cmake.org/pipermail/cmake/2010-March/035992.html:
-# function to collect all the sources from sub-directories
-# into a single list
-function(add_sources)
-  get_property(is_defined GLOBAL PROPERTY SRCS_LIST DEFINED)
-  if(NOT is_defined)
-    define_property(GLOBAL PROPERTY SRCS_LIST
-      BRIEF_DOCS "List of source files"
-      FULL_DOCS "List of all source files in the entire project")
-  endif()
-  # make absolute paths
-  set(SRCS)
-  foreach(s IN LISTS ARGN)
-    if(NOT IS_ABSOLUTE "${s}")
-      get_filename_component(s "${s}" ABSOLUTE)
-    endif()
-    list(APPEND SRCS "${s}")
-  endforeach()
-  # append to global list
-  set_property(GLOBAL APPEND PROPERTY SRCS_LIST "${SRCS}")
-endfunction(add_sources)
-
-set(header_directory "include/yaml-cpp/")
-
-file(GLOB sources "src/[a-zA-Z]*.cpp")
-file(GLOB_RECURSE public_headers "include/yaml-cpp/[a-zA-Z]*.h")
-file(GLOB private_headers "src/[a-zA-Z]*.h")
-
-if(YAML_CPP_BUILD_CONTRIB)
-	file(GLOB contrib_sources "src/contrib/[a-zA-Z]*.cpp")
-	file(GLOB contrib_public_headers "include/yaml-cpp/contrib/[a-zA-Z]*.h")
-	file(GLOB contrib_private_headers "src/contrib/[a-zA-Z]*.h")
-else()
-	add_definitions(-DYAML_CPP_NO_CONTRIB)
+set(yaml-cpp-type STATIC)
+set(yaml-cpp-label-postfix "static")
+if (YAML_BUILD_SHARED_LIBS)
+  set(yaml-cpp-type SHARED)
+  set(yaml-cpp-label-postfix "shared")
 endif()
 
-set(library_sources
-  ${sources}
-  ${public_headers}
-  ${private_headers}
-  ${contrib_sources}
-  ${contrib_public_headers}
-  ${contrib_private_headers}
-)
-add_sources(${library_sources})
+set(build-shared $<BOOL:${YAML_BUILD_SHARED_LIBS}>)
+set(build-windows-dll $<AND:$<BOOL:${CMAKE_HOST_WIN32}>,${build-shared}>)
+set(not-msvc $<NOT:$<CXX_COMPILER_ID:MSVC>>)
+set(msvc-shared_rt $<BOOL:${YAML_MSVC_SHARED_RT}>)
 
-if(VERBOSE)
-	message(STATUS "sources: ${sources}")
-	message(STATUS "public_headers: ${public_headers}")
-	message(STATUS "private_headers: ${private_headers}")
-	message(STATUS "contrib_sources: ${contrib_sources}")
-	message(STATUS "contrib_public_headers: ${contrib_public_headers}")
-	message(STATUS "contrib_private_headers: ${contrib_private_headers}")
+if (NOT DEFINED CMAKE_MSVC_RUNTIME_LIBRARY)
+  set(CMAKE_MSVC_RUNTIME_LIBRARY
+    MultiThreaded$<$<CONFIG:Debug>:Debug>$<${msvc-shared_rt}:DLL>)
 endif()
 
-include_directories(${YAML_CPP_SOURCE_DIR}/src)
-include_directories(${YAML_CPP_SOURCE_DIR}/include)
-
-find_package(Boost REQUIRED)
-include_directories(${Boost_INCLUDE_DIRS})
-
-
-###
-### General compilation settings
-###
-set(yaml_c_flags ${CMAKE_C_FLAGS})
-set(yaml_cxx_flags ${CMAKE_CXX_FLAGS})
-
-if(BUILD_SHARED_LIBS)
-	set(LABEL_SUFFIX "shared")
-else()
-	set(LABEL_SUFFIX "static")
+set(contrib-pattern "src/contrib/*.cpp")
+set(src-pattern "src/*.cpp")
+if (CMAKE_VERSION VERSION_GREATER 3.12)
+  list(INSERT contrib-pattern 0 CONFIGURE_DEPENDS)
+  list(INSERT src-pattern 0 CONFIGURE_DEPENDS)
 endif()
 
-if(APPLE)
-	if(APPLE_UNIVERSAL_BIN)
-		set(CMAKE_OSX_ARCHITECTURES ppc;i386)
-	endif()
+file(GLOB yaml-cpp-contrib-sources ${contrib-pattern})
+file(GLOB yaml-cpp-sources ${src-pattern})
+
+set(msvc-rt $<TARGET_PROPERTY:MSVC_RUNTIME_LIBRARY>)
+
+set(msvc-rt-mtd-static $<STREQUAL:${msvc-rt},MultiThreadedDebug>)
+set(msvc-rt-mt-static $<STREQUAL:${msvc-rt},MultiThreaded>)
+
+set(msvc-rt-mtd-dll $<STREQUAL:${msvc-rt},MultiThreadedDebugDLL>)
+set(msvc-rt-mt-dll $<STREQUAL:${msvc-rt},MultiThreadedDLL>)
+
+set(backport-msvc-runtime $<VERSION_LESS:${CMAKE_VERSION},3.15>)
+
+add_library(yaml-cpp ${yaml-cpp-type} "")
+add_library(yaml-cpp::yaml-cpp ALIAS yaml-cpp)
+
+set_property(TARGET yaml-cpp
+  PROPERTY
+    MSVC_RUNTIME_LIBRARY ${CMAKE_MSVC_RUNTIME_LIBRARY})
+set_property(TARGET yaml-cpp
+  PROPERTY
+    CXX_STANDARD_REQUIRED ON)
+
+target_include_directories(yaml-cpp
+  PUBLIC
+    $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+  PRIVATE
+    $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/src>)
+
+if (NOT DEFINED CMAKE_CXX_STANDARD)
+  set_target_properties(yaml-cpp
+    PROPERTIES
+      CXX_STANDARD 11)
 endif()
 
-if(IPHONE)
-	set(CMAKE_OSX_SYSROOT "iphoneos4.2")
-	set(CMAKE_OSX_ARCHITECTURES "armv6;armv7")
+target_compile_options(yaml-cpp
+  PRIVATE
+    $<${not-msvc}:-Wall -Wextra -Wshadow -Weffc++ -Wno-long-long>
+    $<${not-msvc}:-pedantic -pedantic-errors>
+
+    $<$<AND:${backport-msvc-runtime},${msvc-rt-mtd-static}>:-MTd>
+    $<$<AND:${backport-msvc-runtime},${msvc-rt-mt-static}>:-MT>
+    $<$<AND:${backport-msvc-runtime},${msvc-rt-mtd-dll}>:-MDd>
+    $<$<AND:${backport-msvc-runtime},${msvc-rt-mt-dll}>:-MD>
+
+    # /wd4127 = disable warning C4127 "conditional expression is constant"
+    # http://msdn.microsoft.com/en-us/library/6t66728h.aspx
+    # /wd4355 = disable warning C4355 "'this' : used in base member initializer list
+    # http://msdn.microsoft.com/en-us/library/3c594ae3.aspx
+    $<$<CXX_COMPILER_ID:MSVC>:/W3 /wd4127 /wd4355>)
+
+target_compile_definitions(yaml-cpp
+  PRIVATE
+    $<${build-windows-dll}:${PROJECT_NAME}_DLL>
+    $<$<NOT:$<BOOL:${YAML_CPP_BUILD_CONTRIB}>>:YAML_CPP_NO_CONTRIB>)
+
+target_sources(yaml-cpp
+  PRIVATE
+    $<$<BOOL:${YAML_CPP_BUILD_CONTRIB}>:${yaml-cpp-contrib-sources}>
+    ${yaml-cpp-sources})
+
+if (NOT DEFINED CMAKE_DEBUG_POSTFIX)
+  set(CMAKE_DEBUG_POSTFIX "d")
 endif()
 
-if(WIN32)
-	if(BUILD_SHARED_LIBS)
-		add_definitions(-D${PROJECT_NAME}_DLL)	# use or build Windows DLL
-	endif()
-	if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
-		set(CMAKE_INSTALL_PREFIX "C:/")
-	endif()
-endif()
-
-# GCC or Clang specialities
-if("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU" OR
-   "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
-	### General stuff
-	if(WIN32)
-		set(CMAKE_SHARED_LIBRARY_PREFIX "")	# DLLs do not have a "lib" prefix
-		set(CMAKE_IMPORT_LIBRARY_PREFIX "")	# same for DLL import libs
-		set(CMAKE_LINK_DEF_FILE_FLAG "")	# CMake workaround (2.8.3)
-	endif()
-
-	### Project stuff
-	if(NOT CMAKE_CONFIGURATION_TYPES AND NOT CMAKE_BUILD_TYPE)
-		set(CMAKE_BUILD_TYPE Release)
-	endif()
-	#
-	set(CMAKE_CXX_FLAGS_RELEASE "-O2")
-	set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O2 -g")
-	set(CMAKE_CXX_FLAGS_DEBUG "-g")
-	set(CMAKE_CXX_FLAGS_MINSIZEREL "-Os")
-	#
-	set(GCC_EXTRA_OPTIONS "")
-	#
-	set(FLAG_TESTED "-Wextra")
-	check_cxx_compiler_flag(${FLAG_TESTED} FLAG_WEXTRA)
-	if(FLAG_WEXTRA)
-		set(GCC_EXTRA_OPTIONS "${GCC_EXTRA_OPTIONS} ${FLAG_TESTED}")
-	endif()
-	#
-	set(yaml_cxx_flags "-Wall ${GCC_EXTRA_OPTIONS} -pedantic -Wno-long-long ${yaml_cxx_flags}")
-
-	### Make specific
-	if(${CMAKE_BUILD_TOOL} MATCHES make OR ${CMAKE_BUILD_TOOL} MATCHES gmake)
-		add_custom_target(debuggable $(MAKE) clean
-			COMMAND ${CMAKE_COMMAND} -DCMAKE_BUILD_TYPE=Debug ${CMAKE_SOURCE_DIR}
-			COMMENT "Adjusting settings for debug compilation"
-			VERBATIM)
-		add_custom_target(releasable $(MAKE) clean
-			COMMAND ${CMAKE_COMMAND} -DCMAKE_BUILD_TYPE=Release ${CMAKE_SOURCE_DIR}
-			COMMENT "Adjusting settings for release compilation"
-			VERBATIM)
-	endif()
-endif()
-
-# Microsoft VisualC++ specialities
-if(MSVC)
-	### General stuff
-	# a) Change MSVC runtime library settings (/MD[d], /MT[d], /ML[d] (single-threaded until VS 2003))
-	#    plus set lib suffix for later use and project label accordingly
-	# see http://msdn.microsoft.com/en-us/library/aa278396(v=VS.60).aspx
-	#     http://msdn.microsoft.com/en-us/library/2kzt1wy3(v=VS.71).aspx
-	set(LIB_RT_SUFFIX "md")	# CMake defaults to /MD for MSVC
-	set(LIB_RT_OPTION "/MD")
-	#
-	if(NOT MSVC_SHARED_RT)	# User wants to have static runtime libraries (/MT, /ML)
-		if(MSVC_STHREADED_RT)	# User wants to have old single-threaded static runtime libraries
-			set(LIB_RT_SUFFIX "ml")
-			set(LIB_RT_OPTION "/ML")
-			if(NOT ${MSVC_VERSION} LESS 1400)
-				message(FATAL_ERROR "Single-threaded static runtime libraries (/ML) only available until VS .NET 2003 (7.1).")
-			endif()
-		else()
-			set(LIB_RT_SUFFIX "mt")
-			set(LIB_RT_OPTION "/MT")
-		endif()
-
-		# correct linker options
-		foreach(flag_var  yaml_c_flags  yaml_cxx_flags)
-			foreach(config_name  ""  DEBUG  RELEASE  MINSIZEREL  RELWITHDEBINFO)
-				set(var_name "${flag_var}")
-				if(NOT "${config_name}" STREQUAL "")
-					set(var_name "${var_name}_${config_name}")
-				endif()
-				string(REPLACE "/MD" "${LIB_RT_OPTION}" ${var_name} "${${var_name}}")
-			endforeach()
-		endforeach()
-	endif()
-	#
-	set(LABEL_SUFFIX "${LABEL_SUFFIX} ${LIB_RT_SUFFIX}")
-
-	# b) Change prefix for static libraries
-	set(CMAKE_STATIC_LIBRARY_PREFIX "lib")	# to distinguish static libraries from DLL import libs
-
-	# c) Correct suffixes for static libraries
-	if(NOT BUILD_SHARED_LIBS)
-		### General stuff
-		set(LIB_TARGET_SUFFIX "${LIB_SUFFIX}${LIB_RT_SUFFIX}")
-	endif()
-
-	### Project stuff
-	# /W3 = set warning level; see http://msdn.microsoft.com/en-us/library/thxezb7y.aspx
-	# /wd4127 = disable warning C4127 "conditional expression is constant"; see http://msdn.microsoft.com/en-us/library/6t66728h.aspx
-	# /wd4355 = disable warning C4355 "'this' : used in base member initializer list"; http://msdn.microsoft.com/en-us/library/3c594ae3.aspx
-	set(yaml_cxx_flags "/W3 /wd4127 /wd4355 ${yaml_cxx_flags}")
-endif()
-
-
-###
-### General install settings
-###
-if(WIN32)
-	set(_library_dir bin)	# .dll are in PATH, like executables
-else()
-	set(_library_dir lib)
-endif()
-
-set(INCLUDE_INSTALL_ROOT_DIR include)
-
-set(INCLUDE_INSTALL_DIR ${INCLUDE_INSTALL_ROOT_DIR}/yaml-cpp)
-set(LIB_INSTALL_DIR "${_library_dir}${LIB_SUFFIX}")
-
-set(_INSTALL_DESTINATIONS
-	RUNTIME DESTINATION bin
-	LIBRARY DESTINATION ${LIB_INSTALL_DIR}
-	ARCHIVE DESTINATION "lib${LIB_SUFFIX}"
-)
-
-
-###
-### Library
-###
-add_library(yaml-cpp ${library_sources})
-set_target_properties(yaml-cpp PROPERTIES
-  COMPILE_FLAGS "${yaml_c_flags} ${yaml_cxx_flags}"
-)
-
 set_target_properties(yaml-cpp PROPERTIES
-	VERSION "${YAML_CPP_VERSION}"
-	SOVERSION "${YAML_CPP_VERSION_MAJOR}.${YAML_CPP_VERSION_MINOR}"
-	PROJECT_LABEL "yaml-cpp ${LABEL_SUFFIX}"
-)
+  VERSION "${PROJECT_VERSION}"
+  SOVERSION "${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}"
+  PROJECT_LABEL "yaml-cpp ${yaml-cpp-label-postfix}"
+  DEBUG_POSTFIX "${CMAKE_DEBUG_POSTFIX}")
 
-if(IPHONE)
-	set_target_properties(yaml-cpp PROPERTIES
-		XCODE_ATTRIBUTE_IPHONEOS_DEPLOYMENT_TARGET "3.0"
-	)
+configure_package_config_file(
+  "${PROJECT_SOURCE_DIR}/yaml-cpp-config.cmake.in"
+  "${PROJECT_BINARY_DIR}/yaml-cpp-config.cmake"
+  INSTALL_DESTINATION "${CMAKE_INSTALL_DATADIR}/cmake/yaml-cpp")
+
+write_basic_package_version_file(
+  "${PROJECT_BINARY_DIR}/yaml-cpp-config-version.cmake"
+  COMPATIBILITY AnyNewerVersion)
+
+configure_file(yaml-cpp.pc.in yaml-cpp.pc @ONLY)
+
+if (YAML_CPP_INSTALL)
+	install(TARGETS yaml-cpp
+    EXPORT yaml-cpp-targets
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
+	install(DIRECTORY ${PROJECT_SOURCE_DIR}/include/
+    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+		FILES_MATCHING PATTERN "*.h")
+  install(EXPORT yaml-cpp-targets
+    DESTINATION "${CMAKE_INSTALL_DATADIR}/cmake/yaml-cpp")
+	install(FILES
+		"${PROJECT_BINARY_DIR}/yaml-cpp-config.cmake"
+		"${PROJECT_BINARY_DIR}/yaml-cpp-config-version.cmake"
+    DESTINATION "${CMAKE_INSTALL_DATADIR}/cmake/yaml-cpp")
+  install(FILES "${PROJECT_BINARY_DIR}/yaml-cpp.pc"
+    DESTINATION ${CMAKE_INSTALL_DATADIR}/pkgconfig)
 endif()
 
-if(MSVC)
-	if(NOT BUILD_SHARED_LIBS)
-		# correct library names
-		set_target_properties(yaml-cpp PROPERTIES
-			DEBUG_POSTFIX "${LIB_TARGET_SUFFIX}d"
-			RELEASE_POSTFIX "${LIB_TARGET_SUFFIX}"
-			MINSIZEREL_POSTFIX "${LIB_TARGET_SUFFIX}"
-			RELWITHDEBINFO_POSTFIX "${LIB_TARGET_SUFFIX}"
-		)
-	endif()
-endif()
-
-install(TARGETS yaml-cpp ${_INSTALL_DESTINATIONS})
-install(
-	DIRECTORY ${header_directory}
-	DESTINATION ${INCLUDE_INSTALL_DIR}
-	FILES_MATCHING PATTERN "*.h"
-)
-
-export(
-    TARGETS yaml-cpp
-    FILE "${PROJECT_BINARY_DIR}/yaml-cpp-targets.cmake")
-export(PACKAGE yaml-cpp)
-set(EXPORT_TARGETS yaml-cpp CACHE INTERNAL "export targets")
-
-set(CONFIG_INCLUDE_DIRS "${YAML_CPP_SOURCE_DIR}/include")
-configure_file(${CMAKE_CURRENT_SOURCE_DIR}/yaml-cpp-config.cmake.in
-	"${PROJECT_BINARY_DIR}/yaml-cpp-config.cmake" @ONLY)
-configure_file(${CMAKE_CURRENT_SOURCE_DIR}/yaml-cpp-config-version.cmake.in
-	"${PROJECT_BINARY_DIR}/yaml-cpp-config-version.cmake" @ONLY)
-
-if(UNIX)
-	set(PC_FILE ${CMAKE_BINARY_DIR}/yaml-cpp.pc)
-	configure_file("yaml-cpp.pc.cmake" ${PC_FILE} @ONLY)
-	install(FILES ${PC_FILE} DESTINATION ${LIB_INSTALL_DIR}/pkgconfig)
-endif()
-
-
-###
-### Extras
-###
-if(YAML_CPP_BUILD_TOOLS)
+if(YAML_CPP_BUILD_TESTS)
 	add_subdirectory(test)
+endif()
+
+if(YAML_CPP_BUILD_TOOLS)
 	add_subdirectory(util)
 endif()
 
-### Formatting
-get_property(all_sources GLOBAL PROPERTY SRCS_LIST)
-add_custom_target(format
-	COMMAND clang-format --style=file -i ${all_sources}
-	COMMENT "Running clang-format"
-	VERBATIM)
+if (YAML_CPP_CLANG_FORMAT_EXE)
+  add_custom_target(format
+    COMMAND clang-format --style=file -i $<TARGET_PROPERTY:yaml-cpp,SOURCES>
+    COMMAND_EXPAND_LISTS
+    COMMENT "Running clang-format"
+    VERBATIM)
+endif()

CONTRIBUTING.md

@@ -0,0 +1,26 @@
+# Style
+
+This project is formatted with [clang-format][fmt] using the style file at the root of the repository. Please run clang-format before sending a pull request.
+
+In general, try to follow the style of surrounding code. We mostly follow the [Google C++ style guide][cpp-style].
+
+Commit messages should be in the imperative mood, as described in the [Git contributing file][git-contrib]:
+
+> Describe your changes in imperative mood, e.g. "make xyzzy do frotz"
+> instead of "[This patch] makes xyzzy do frotz" or "[I] changed xyzzy
+> to do frotz", as if you are giving orders to the codebase to change
+> its behaviour.
+
+[fmt]: http://clang.llvm.org/docs/ClangFormat.html
+[cpp-style]: https://google.github.io/styleguide/cppguide.html
+[git-contrib]: http://git.kernel.org/cgit/git/git.git/tree/Documentation/SubmittingPatches?id=HEAD
+
+# Tests
+
+Please verify the tests pass by running the target `tests/run_tests`.
+
+If you are adding functionality, add tests accordingly.
+
+# Pull request process
+
+Every pull request undergoes a code review. Unfortunately, github's code review process isn't great, but we'll manage. During the code review, if you make changes, add new commits to the pull request for each change. Once the code review is complete, rebase against the master branch and squash into a single commit.

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2008 Jesse Beder.
+Copyright (c) 2008-2015 Jesse Beder.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -0,0 +1,58 @@
+# yaml-cpp [![Build Status](https://travis-ci.org/jbeder/yaml-cpp.svg?branch=master)](https://travis-ci.org/jbeder/yaml-cpp) [![Documentation](https://codedocs.xyz/jbeder/yaml-cpp.svg)](https://codedocs.xyz/jbeder/yaml-cpp/)
+
+`yaml-cpp` is a [YAML](http://www.yaml.org/) parser and emitter in C++ matching the [YAML 1.2 spec](http://www.yaml.org/spec/1.2/spec.html).
+
+## Usage
+
+See [Tutorial](https://github.com/jbeder/yaml-cpp/wiki/Tutorial) and [How to Emit YAML](https://github.com/jbeder/yaml-cpp/wiki/How-To-Emit-YAML) for reference. For the old API (until 0.5.0), see [How To Parse A Document](https://github.com/jbeder/yaml-cpp/wiki/How-To-Parse-A-Document-(Old-API)).
+
+## Any Problems?
+
+If you find a bug, post an [issue](https://github.com/jbeder/yaml-cpp/issues)! If you have questions about how to use yaml-cpp, please post it on http://stackoverflow.com and tag it [`yaml-cpp`](http://stackoverflow.com/questions/tagged/yaml-cpp).
+
+## How to Build
+
+`yaml-cpp` uses [CMake](http://www.cmake.org) to support cross-platform building. Install [CMake](http://www.cmake.org) _(Resources -> Download)_ before proceeding. The basic steps to build are:
+
+**Note:** If you don't use the provided installer for your platform, make sure that you add `CMake`'s bin folder to your path.
+
+#### 1. Navigate into the source directory, create build folder and run `CMake`:
+
+```sh
+mkdir build
+cd build
+cmake [-G generator] [-YAML_BUILD_SHARED_LIBS=on|OFF] ..
+```
+
+  * The `generator` option is the build system you'd like to use. Run `cmake` without arguments to see a full list of available generators.
+    * On Windows, you might use "Visual Studio 12 2013" (VS 2013 32-bits), or "Visual Studio 14 2015 Win64" (VS 2015 64-bits).
+    * On OS X, you might use "Xcode".
+    * On a UNIX-like system, omit the option (for a Makefile).
+
+  * `yaml-cpp` builds a static library by default, you may want to build a shared library by specifying `-YAML_BUILD_SHARED_LIBS=ON`.
+
+  * For more options on customizing the build, see the [CMakeLists.txt](https://github.com/jbeder/yaml-cpp/blob/master/CMakeLists.txt) file.
+
+#### 2. Build it!
+  * The command you'll need to run depends on the generator you chose earlier.
+
+**Note:** To clean up, just remove the `build` directory.
+
+## Recent Releases
+
+[yaml-cpp 0.6.0](https://github.com/jbeder/yaml-cpp/releases/tag/yaml-cpp-0.6.0) released! This release requires C++11, and no longer depends on Boost.
+
+[yaml-cpp 0.3.0](https://github.com/jbeder/yaml-cpp/releases/tag/release-0.3.0) is still available if you want the old API.
+
+**The old API will continue to be supported, and will still receive bugfixes!** The 0.3.x and 0.4.x versions will be old API releases, and 0.5.x and above will all be new API releases.
+
+# API Documentation 
+
+The autogenerated API reference is hosted on [CodeDocs](https://codedocs.xyz/jbeder/yaml-cpp/index.html)
+
+# Third Party Integrations
+
+The following projects are not officially supported:
+
+- [Qt wrapper](https://gist.github.com/brcha/d392b2fe5f1e427cc8a6)
+- [UnrealEngine Wrapper](https://github.com/jwindgassen/UnrealYAML)

WORKSPACE

@@ -0,0 +1,10 @@
+workspace(name = "com_github_jbeder_yaml_cpp")
+
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
+http_archive(
+    name = "com_google_googletest",
+    strip_prefix = "googletest-release-1.8.1",
+    url = "https://github.com/google/googletest/archive/release-1.8.1.tar.gz",
+    sha256 = "9bf1fe5182a604b4135edc1a425ae356c9ad15e9b23f9f12a02e80184c3a249c",
+)

appveyor.yml

@@ -0,0 +1,28 @@
+version: 1.0.{build}
+
+environment:
+  matrix:
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      CMAKE_GENERATOR: Visual Studio 14 2015
+      CMAKE_PLATFORM: win32
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      CMAKE_GENERATOR: Visual Studio 14 2015
+      CMAKE_PLATFORM: x64
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      CMAKE_GENERATOR: Visual Studio 15 2017
+      CMAKE_PLATFORM: win32
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      CMAKE_GENERATOR: Visual Studio 15 2017
+      CMAKE_PLATFORM: x64
+
+before_build:
+   - cmd: mkdir build
+   - cmd: cd build
+   - cmd: cmake .. -G "%CMAKE_GENERATOR%" -DCMAKE_GENERATOR_PLATFORM=%CMAKE_PLATFORM%
+   - cmd: cd ..
+
+build_script:
+   - cmake --build build
+test_script:
+   - cmd: cd build
+   - ctest

docs/Breaking-Changes.md

@@ -0,0 +1,52 @@
+# The following is a list of breaking changes to yaml-cpp, by version #
+
+# New API #
+
+## HEAD ##
+
+  * Throws an exception when trying to parse a negative number as an unsigned integer.
+  * Supports the `as<int8_t>`/`as<uint8_t>`, which throws an exception when the value exceeds the range of `int8_t`/`uint8_t`.
+
+## 0.6.0 ##
+
+  * Requires C++11.
+
+## 0.5.3 ##
+
+_none_
+
+## 0.5.2 ##
+
+_none_
+
+## 0.5.1 ##
+
+  * `Node::clear` was replaced by `Node::reset`, which takes an optional node, similar to smart pointers.
+
+## 0.5.0 ##
+
+Initial version of the new API.
+
+# Old API #
+
+## 0.3.0 ##
+
+_none_
+
+## 0.2.7 ##
+
+  * `YAML::Binary` now takes `const unsigned char *` for the binary data (instead of `const char *`).
+
+## 0.2.6 ##
+
+  * `Node::GetType()` is now `Node::Type()`, and returns an enum `NodeType::value`, where:
+> > ` struct NodeType { enum value { Null, Scalar, Sequence, Map }; }; `
+  * `Node::GetTag()` is now `Node::Tag()`
+  * `Node::Identity()` is removed, and `Node::IsAlias()` and `Node::IsReferenced()` have been merged into `Node::IsAliased()`. The reason: there's no reason to distinguish an alias node from its anchor - whichever happens to be emitted first will be the anchor, and the rest will be aliases.
+  * `Node::Read<T>` is now `Node::to<T>`. This wasn't a documented function, so it shouldn't break anything.
+  * `Node`'s comparison operators (for example, `operator == (const Node&, const T&)`) have all been removed. These weren't documented either (they were just used for the tests), so this shouldn't break anything either.
+  * The emitter no longer produces the document start by default - if you want it, you can supply it with the manipulator `YAML::BeginDoc`.
+
+## 0.2.5 ##
+
+This wiki was started with v0.2.5.

docs/How-To-Emit-YAML.md

@@ -0,0 +1,230 @@
+## Contents ##
+
+
+
+# Basic Emitting #
+
+The model for emitting YAML is `std::ostream` manipulators. A `YAML::Emitter` objects acts as an output stream, and its output can be retrieved through the `c_str()` function (as in `std::string`). For a simple example:
+
+```cpp
+#include "yaml-cpp/yaml.h"
+
+int main()
+{
+   YAML::Emitter out;
+   out << "Hello, World!";
+   
+   std::cout << "Here's the output YAML:\n" << out.c_str(); // prints "Hello, World!"
+   return 0;
+}
+```
+
+# Simple Lists and Maps #
+
+A `YAML::Emitter` object acts as a state machine, and we use manipulators to move it between states. Here's a simple sequence:
+
+```cpp
+YAML::Emitter out;
+out << YAML::BeginSeq;
+out << "eggs";
+out << "bread";
+out << "milk";
+out << YAML::EndSeq;
+```
+
+produces
+
+```yaml
+- eggs
+- bread
+- milk
+```
+
+A simple map:
+
+```cpp
+YAML::Emitter out;
+out << YAML::BeginMap;
+out << YAML::Key << "name";
+out << YAML::Value << "Ryan Braun";
+out << YAML::Key << "position";
+out << YAML::Value << "LF";
+out << YAML::EndMap;
+```
+
+produces
+
+```yaml
+name: Ryan Braun
+position: LF
+```
+
+These elements can, of course, be nested:
+
+```cpp
+YAML::Emitter out;
+out << YAML::BeginMap;
+out << YAML::Key << "name";
+out << YAML::Value << "Barack Obama";
+out << YAML::Key << "children";
+out << YAML::Value << YAML::BeginSeq << "Sasha" << "Malia" << YAML::EndSeq;
+out << YAML::EndMap;
+```
+
+produces
+
+```yaml
+name: Barack Obama
+children:
+  - Sasha
+  - Malia
+```
+
+# Using Manipulators #
+
+To deviate from standard formatting, you can use manipulators to modify the output format. For example,
+
+```cpp
+YAML::Emitter out;
+out << YAML::Literal << "A\n B\n  C";
+```
+
+produces
+
+```yaml
+|
+A
+ B
+  C
+```
+and
+
+```cpp
+YAML::Emitter out;
+out << YAML::Flow;
+out << YAML::BeginSeq << 2 << 3 << 5 << 7 << 11 << YAML::EndSeq;
+```
+
+produces
+
+```yaml
+[2, 3, 5, 7, 11]
+```
+
+Comments act like manipulators:
+
+```cpp
+YAML::Emitter out;
+out << YAML::BeginMap;
+out << YAML::Key << "method";
+out << YAML::Value << "least squares";
+out << YAML::Comment("should we change this method?");
+out << YAML::EndMap;
+```
+
+produces
+
+```yaml
+method: least squares  # should we change this method?
+```
+
+And so do aliases/anchors:
+
+```cpp
+YAML::Emitter out;
+out << YAML::BeginSeq;
+out << YAML::Anchor("fred");
+out << YAML::BeginMap;
+out << YAML::Key << "name" << YAML::Value << "Fred";
+out << YAML::Key << "age" << YAML::Value << "42";
+out << YAML::EndMap;
+out << YAML::Alias("fred");
+out << YAML::EndSeq;
+```
+
+produces
+
+```yaml
+- &fred
+  name: Fred
+  age: 42
+- *fred
+```
+
+# STL Containers, and Other Overloads #
+We overload `operator <<` for `std::vector`, `std::list`, and `std::map`, so you can write stuff like:
+
+```cpp
+std::vector <int> squares;
+squares.push_back(1);
+squares.push_back(4);
+squares.push_back(9);
+squares.push_back(16);
+
+std::map <std::string, int> ages;
+ages["Daniel"] = 26;
+ages["Jesse"] = 24;
+
+YAML::Emitter out;
+out << YAML::BeginSeq;
+out << YAML::Flow << squares;
+out << ages;
+out << YAML::EndSeq;
+```
+
+produces
+
+```yaml
+- [1, 4, 9, 16]
+-
+  Daniel: 26
+  Jesse: 24
+```
+
+Of course, you can overload `operator <<` for your own types:
+
+```cpp
+struct Vec3 { int x; int y; int z; };
+YAML::Emitter& operator << (YAML::Emitter& out, const Vec3& v) {
+	out << YAML::Flow;
+	out << YAML::BeginSeq << v.x << v.y << v.z << YAML::EndSeq;
+	return out;
+}
+```
+and it'll play nicely with everything else.
+
+# Using Existing Nodes #
+
+We also overload `operator << ` for `YAML::Node`s in both APIs, so you can output existing Nodes. Of course, Nodes in the old API are read-only, so it's tricky to emit them if you want to modify them. So use the new API!
+
+# Output Encoding #
+
+The output is always UTF-8. By default, yaml-cpp will output as much as it can without escaping any characters. If you want to restrict the output to ASCII, use the manipulator `YAML::EscapeNonAscii`:
+
+```cpp
+emitter.SetOutputCharset(YAML::EscapeNonAscii);
+```
+
+# Lifetime of Manipulators #
+
+Manipulators affect the **next** output item in the stream. If that item is a `BeginSeq` or `BeginMap`, the manipulator lasts until the corresponding `EndSeq` or `EndMap`. (However, within that sequence or map, you can override the manipulator locally, etc.; in effect, there's a "manipulator stack" behind the scenes.)
+
+If you want to permanently change a setting, there are global setters corresponding to each manipulator, e.g.:
+
+```cpp
+YAML::Emitter out;
+out.SetIndent(4);
+out.SetMapStyle(YAML::Flow);
+```
+
+# When Something Goes Wrong #
+
+If something goes wrong when you're emitting a document, it must be something like forgetting a `YAML::EndSeq`, or a misplaced `YAML::Key`. In this case, emitting silently fails (no more output is emitted) and an error flag is set. For example:
+
+```cpp
+YAML::Emitter out;
+assert(out.good());
+out << YAML::Key;
+assert(!out.good());
+std::cout << "Emitter error: " << out.GetLastError() << "\n";
+```

docs/How-To-Parse-A-Document-(Old-API).md

@@ -0,0 +1,265 @@
+_The following describes the old API. For the new API, see the [Tutorial](https://github.com/jbeder/yaml-cpp/wiki/Tutorial)._
+
+## Contents ##
+
+
+# Basic Parsing #
+
+The parser accepts streams, not file names, so you need to first load the file. Since a YAML file can contain many documents, you can grab them one-by-one. A simple way to parse a YAML file might be:
+
+```
+#include <fstream>
+#include "yaml-cpp/yaml.h"
+
+int main()
+{
+    std::ifstream fin("test.yaml");
+    YAML::Parser parser(fin);
+
+    YAML::Node doc;
+    while(parser.GetNextDocument(doc)) {
+       // ...
+    }
+
+    return 0;
+}
+```
+
+# Reading From the Document #
+
+Suppose we have a document consisting only of a scalar. We can read that scalar like this:
+
+```
+YAML::Node doc;    // let's say we've already parsed this document
+std::string scalar;
+doc >> scalar;
+std::cout << "That scalar was: " << scalar << std::endl;
+```
+
+How about sequences? Let's say our document now consists only of a sequences of scalars. We can use an iterator:
+
+```
+YAML::Node doc;    // already parsed
+for(YAML::Iterator it=doc.begin();it!=doc.end();++it) {
+    std::string scalar;
+    *it >> scalar;
+    std::cout << "Found scalar: " << scalar << std::endl;
+}
+```
+
+... or we can just loop through:
+
+```
+YAML::Node doc;    // already parsed
+for(unsigned i=0;i<doc.size();i++) {
+    std::string scalar;
+    doc[i] >> scalar;
+    std::cout << "Found scalar: " << scalar << std::endl;
+}
+```
+
+And finally maps. For now, let's say our document is a map with all keys/values being scalars. Again, we can iterate:
+
+```
+YAML::Node doc;    // already parsed
+for(YAML::Iterator it=doc.begin();it!=doc.end();++it) {
+    std::string key, value;
+    it.first() >> key;
+    it.second() >> value;
+    std::cout << "Key: " << key << ", value: " << value << std::endl;
+}
+```
+
+Note that dereferencing a map iterator is undefined; instead, use the `first` and `second` methods to get the key and value nodes, respectively.
+
+Alternatively, we can pick off the values one-by-one, if we know the keys:
+
+```
+YAML::Node doc;    // already parsed
+std::string name;
+doc["name"] >> name;
+int age;
+doc["age"] >> age;
+std::cout << "Found entry with name '" << name << "' and age '" << age << "'\n";
+```
+
+One thing to be keep in mind: reading a map by key (as immediately above) requires looping through all entries until we find the right key, which is an O(n) operation. So if you're reading the entire map this way, it'll be O(n^2). For small n, this isn't a big deal, but I wouldn't recommend reading maps with a very large number of entries (>100, say) this way.
+
+## Optional Keys ##
+
+If you try to access a key that doesn't exist, `yaml-cpp` throws an exception (see [When Something Goes Wrong](https://github.com/jbeder/yaml-cpp/wiki/How-To-Parse-A-Document-(Old-API)#When_Something_Goes_Wrong). If you have optional keys, it's often easier to use `FindValue` instead of `operator[]`:
+
+```
+YAML::Node doc;    // already parsed
+if(const YAML::Node *pName = doc.FindValue("name")) {
+    std::string name;
+    *pName >> name;
+    std::cout << "Key 'name' exists, with value '" << name << "'\n";
+} else {
+    std::cout << "Key 'name' doesn't exist\n";
+}
+```
+
+# Getting More Complicated #
+
+The above three methods can be combined to read from an arbitrary document. But we can make life a lot easier. Suppose we're reading 3-vectors (i.e., vectors with three components), so we've got a structure looking like this:
+
+```
+struct Vec3 {
+    float x, y, z;
+};
+```
+
+We can read this in one operation by overloading the extraction (>>) operator:
+
+```
+void operator >> (const YAML::Node& node, Vec3& v)
+{
+    node[0] >> v.x;
+    node[1] >> v.y;
+    node[2] >> v.z;
+}
+
+// now it's a piece of cake to read it
+YAML::Node doc;    // already parsed
+Vec3 v;
+doc >> v;
+std::cout << "Here's the vector: (" << v.x << ", " << v.y << ", " << v.z << ")\n";
+```
+
+# A Complete Example #
+
+Here's a complete example of how to parse a complex YAML file:
+
+`monsters.yaml`
+
+```
+- name: Ogre
+  position: [0, 5, 0]
+  powers:
+    - name: Club
+      damage: 10
+    - name: Fist
+      damage: 8
+- name: Dragon
+  position: [1, 0, 10]
+  powers:
+    - name: Fire Breath
+      damage: 25
+    - name: Claws
+      damage: 15
+- name: Wizard
+  position: [5, -3, 0]
+  powers:
+    - name: Acid Rain
+      damage: 50
+    - name: Staff
+      damage: 3
+```
+
+`main.cpp`
+
+```
+#include "yaml-cpp/yaml.h"
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <vector>
+
+// our data types
+struct Vec3 {
+   float x, y, z;
+};
+
+struct Power {
+   std::string name;
+   int damage;
+};
+
+struct Monster {
+   std::string name;
+   Vec3 position;
+   std::vector <Power> powers;
+};
+
+// now the extraction operators for these types
+void operator >> (const YAML::Node& node, Vec3& v) {
+   node[0] >> v.x;
+   node[1] >> v.y;
+   node[2] >> v.z;
+}
+
+void operator >> (const YAML::Node& node, Power& power) {
+   node["name"] >> power.name;
+   node["damage"] >> power.damage;
+}
+
+void operator >> (const YAML::Node& node, Monster& monster) {
+   node["name"] >> monster.name;
+   node["position"] >> monster.position;
+   const YAML::Node& powers = node["powers"];
+   for(unsigned i=0;i<powers.size();i++) {
+      Power power;
+      powers[i] >> power;
+      monster.powers.push_back(power);
+   }
+}
+
+int main()
+{
+   std::ifstream fin("monsters.yaml");
+   YAML::Parser parser(fin);
+   YAML::Node doc;
+   parser.GetNextDocument(doc);
+   for(unsigned i=0;i<doc.size();i++) {
+      Monster monster;
+      doc[i] >> monster;
+      std::cout << monster.name << "\n";
+   }
+
+   return 0;
+}
+```
+
+# When Something Goes Wrong #
+
+... we throw an exception (all exceptions are derived from `YAML::Exception`). If there's a parsing exception (i.e., a malformed YAML document), we throw a `YAML::ParserException`:
+
+```
+try {
+    std::ifstream fin("test.yaml");
+    YAML::Parser parser(fin);
+    YAML::Node doc;
+    parser.GetNextDocument(doc);
+    // do stuff
+} catch(YAML::ParserException& e) {
+    std::cout << e.what() << "\n";
+}
+```
+
+If you make a programming error (say, trying to read a scalar from a sequence node, or grabbing a key that doesn't exist), we throw some kind of `YAML::RepresentationException`. To prevent this, you can check what kind of node something is:
+
+```
+    YAML::Node node;
+    YAML::NodeType::value type = node.Type();  // should be:
+                                               // YAML::NodeType::Null
+                                               // YAML::NodeType::Scalar
+                                               // YAML::NodeType::Sequence
+                                               // YAML::NodeType::Map
+```
+
+# Note about copying `YAML::Node` #
+
+Currently `YAML::Node` is non-copyable, so you need to do something like
+
+```
+    const YAML::Node& node = doc["whatever"];
+```
+
+This is intended behavior. If you want to copy a node, use the `Clone` function:
+
+```
+    std::auto_ptr<YAML::Node> pCopy = myOtherNode.Clone();
+```
+
+The intent is that if you'd like to keep a `YAML::Node` around for longer than the document will stay in scope, you can clone it and store it as long as you like.

docs/Strings.md

@@ -0,0 +1,18 @@
+# Encodings and `yaml-cpp` #
+
+`yaml-cpp` will parse any file as specified by the [YAML 1.2 spec](http://www.yaml.org/spec/1.2/spec.html#id2570322). Internally, it stores all strings in UTF-8, and representation is done with UTF-8. This means that in
+
+```
+std::string str;
+node >> str;
+```
+
+`str` will be UTF-8. Similarly, if you're accessing a map by string key, you need to pass the key in UTF-8. If your application uses a different encoding, you need to convert to and from UTF-8 to work with `yaml-cpp`. (It's possible we'll add some small conversion functions, but for now it's restricted.)
+
+---
+
+For convenience, Richard Weeks has kindly provided a google gadget that converts Unicode to a string literal. It's a Google Gadget, so unfortunately it does not work on GitHub. Patches welcome to port it to a usable format here:
+
+```
+<wiki:gadget url="http://hosting.gmodules.com/ig/gadgets/file/111180078345548400783/c-style-utf8-encoder.xml"/>
+```

docs/Tutorial.md

@@ -0,0 +1,201 @@
+# Introduction #
+
+A typical example, loading a configuration file, might look like this:
+
+```cpp
+YAML::Node config = YAML::LoadFile("config.yaml");
+
+if (config["lastLogin"]) {
+  std::cout << "Last logged in: " << config["lastLogin"].as<DateTime>() << "\n";
+}
+
+const std::string username = config["username"].as<std::string>();
+const std::string password = config["password"].as<std::string>();
+login(username, password);
+config["lastLogin"] = getCurrentDateTime();
+
+std::ofstream fout("config.yaml");
+fout << config;
+```
+
+# Basic Parsing and Node Editing #
+
+All nodes in a YAML document (including the root) are represented by `YAML::Node`. You can check what kind it is:
+
+```cpp
+YAML::Node node = YAML::Load("[1, 2, 3]");
+assert(node.Type() == YAML::NodeType::Sequence);
+assert(node.IsSequence());  // a shortcut!
+```
+
+Collection nodes (sequences and maps) act somewhat like STL vectors and maps:
+
+```cpp
+YAML::Node primes = YAML::Load("[2, 3, 5, 7, 11]");
+for (std::size_t i=0;i<primes.size();i++) {
+  std::cout << primes[i].as<int>() << "\n";
+}
+// or:
+for (YAML::const_iterator it=primes.begin();it!=primes.end();++it) {
+  std::cout << it->as<int>() << "\n";
+}
+
+primes.push_back(13);
+assert(primes.size() == 6);
+```
+
+and
+
+```cpp
+YAML::Node lineup = YAML::Load("{1B: Prince Fielder, 2B: Rickie Weeks, LF: Ryan Braun}");
+for(YAML::const_iterator it=lineup.begin();it!=lineup.end();++it) {
+  std::cout << "Playing at " << it->first.as<std::string>() << " is " << it->second.as<std::string>() << "\n";
+}
+
+lineup["RF"] = "Corey Hart";
+lineup["C"] = "Jonathan Lucroy";
+assert(lineup.size() == 5);
+```
+
+Querying for keys does **not** create them automatically (this makes handling optional map entries very easy)
+
+```cpp
+YAML::Node node = YAML::Load("{name: Brewers, city: Milwaukee}");
+if (node["name"]) {
+  std::cout << node["name"].as<std::string>() << "\n";
+}
+if (node["mascot"]) {
+  std::cout << node["mascot"].as<std::string>() << "\n";
+}
+assert(node.size() == 2); // the previous call didn't create a node
+```
+
+If you're not sure what kind of data you're getting, you can query the type of a node:
+
+```cpp
+switch (node.Type()) {
+  case Null: // ...
+  case Scalar: // ...
+  case Sequence: // ...
+  case Map: // ...
+  case Undefined: // ...
+}
+```
+
+or ask directly whether it's a particular type, e.g.:
+
+```cpp
+if (node.IsSequence()) {
+  // ...
+}
+```
+
+# Building Nodes #
+
+You can build `YAML::Node` from scratch:
+
+```cpp
+YAML::Node node;  // starts out as null
+node["key"] = "value";  // it now is a map node
+node["seq"].push_back("first element");  // node["seq"] automatically becomes a sequence
+node["seq"].push_back("second element");
+
+node["mirror"] = node["seq"][0];  // this creates an alias
+node["seq"][0] = "1st element";  // this also changes node["mirror"]
+node["mirror"] = "element #1";  // and this changes node["seq"][0] - they're really the "same" node
+
+node["self"] = node;  // you can even create self-aliases
+node[node["mirror"]] = node["seq"];  // and strange loops :)
+```
+
+The above node is now:
+
+```yaml
+&1
+key: value
+&2 seq: [&3 "element #1", second element]
+mirror: *3
+self: *1
+*3 : *2
+```
+
+# How Sequences Turn Into Maps #
+
+Sequences can be turned into maps by asking for non-integer keys. For example,
+
+```cpp
+YAML::Node node  = YAML::Load("[1, 2, 3]");
+node[1] = 5;  // still a sequence, [1, 5, 3]
+node.push_back(-3) // still a sequence, [1, 5, 3, -3]
+node["key"] = "value"; // now it's a map! {0: 1, 1: 5, 2: 3, 3: -3, key: value}
+```
+
+Indexing a sequence node by an index that's not in its range will _usually_ turn it into a map, but if the index is one past the end of the sequence, then the sequence will grow by one to accommodate it. (That's the **only** exception to this rule.) For example,
+
+```cpp
+YAML::Node node = YAML::Load("[1, 2, 3]");
+node[3] = 4; // still a sequence, [1, 2, 3, 4]
+node[10] = 10;  // now it's a map! {0: 1, 1: 2, 2: 3, 3: 4, 10: 10}
+```
+
+# Converting To/From Native Data Types #
+
+Yaml-cpp has built-in conversion to and from most built-in data types, as well as `std::vector`, `std::list`, and `std::map`. The following examples demonstrate when those conversions are used:
+
+```cpp
+YAML::Node node = YAML::Load("{pi: 3.14159, [0, 1]: integers}");
+
+// this needs the conversion from Node to double
+double pi = node["pi"].as<double>();
+
+// this needs the conversion from double to Node
+node["e"] = 2.71828;
+
+// this needs the conversion from Node to std::vector<int> (*not* the other way around!)
+std::vector<int> v;
+v.push_back(0);
+v.push_back(1);
+std::string str = node[v].as<std::string>();
+```
+
+To use yaml-cpp with your own data types, you need to specialize the YAML::convert<> template class. For example, suppose you had a simple `Vec3` class:
+
+```cpp
+struct Vec3 { double x, y, z; /* etc - make sure you have overloaded operator== */ };
+```
+
+You could write
+
+```cpp
+namespace YAML {
+template<>
+struct convert<Vec3> {
+  static Node encode(const Vec3& rhs) {
+    Node node;
+    node.push_back(rhs.x);
+    node.push_back(rhs.y);
+    node.push_back(rhs.z);
+    return node;
+  }
+
+  static bool decode(const Node& node, Vec3& rhs) {
+    if(!node.IsSequence() || node.size() != 3) {
+      return false;
+    }
+
+    rhs.x = node[0].as<double>();
+    rhs.y = node[1].as<double>();
+    rhs.z = node[2].as<double>();
+    return true;
+  }
+};
+}
+```
+
+Then you could use `Vec3` wherever you could use any other type:
+
+```cpp
+YAML::Node node = YAML::Load("start: [1, 3, 0]");
+Vec3 v = node["start"].as<Vec3>();
+node["end"] = Vec3(2, -1, 0);
+```

docs/_config.yml

@@ -0,0 +1 @@
+theme: jekyll-theme-slate

docs/index.md

@@ -0,0 +1 @@
+To learn how to use the library, see the [Tutorial](https://github.com/jbeder/yaml-cpp/wiki/Tutorial) and [How To Emit YAML](https://github.com/jbeder/yaml-cpp/wiki/How-To-Emit-YAML)

include/yaml-cpp/anchor.h

@@ -10,7 +10,7 @@
 #include <cstddef>
 
 namespace YAML {
-typedef std::size_t anchor_t;
+using anchor_t = std::size_t;
 const anchor_t NullAnchor = 0;
 }
 

include/yaml-cpp/binary.h

@@ -19,9 +19,13 @@ YAML_CPP_API std::vector<unsigned char> DecodeBase64(const std::string &input);
 
 class YAML_CPP_API Binary {
  public:
-  Binary() : m_unownedData(0), m_unownedSize(0) {}
   Binary(const unsigned char *data_, std::size_t size_)
-      : m_unownedData(data_), m_unownedSize(size_) {}
+      : m_data{}, m_unownedData(data_), m_unownedSize(size_) {}
+  Binary() : Binary(nullptr, 0) {}
+  Binary(const Binary &) = default;
+  Binary(Binary &&) = default;
+  Binary &operator=(const Binary &) = default;
+  Binary &operator=(Binary &&) = default;
 
   bool owned() const { return !m_unownedData; }
   std::size_t size() const { return owned() ? m_data.size() : m_unownedSize; }
@@ -35,7 +39,7 @@ class YAML_CPP_API Binary {
       rhs.clear();
       rhs.resize(m_unownedSize);
       std::copy(m_unownedData, m_unownedData + m_unownedSize, rhs.begin());
-      m_unownedData = 0;
+      m_unownedData = nullptr;
       m_unownedSize = 0;
     } else {
       m_data.swap(rhs);
@@ -62,6 +66,6 @@ class YAML_CPP_API Binary {
   const unsigned char *m_unownedData;
   std::size_t m_unownedSize;
 };
-}
+}  // namespace YAML
 
 #endif  // BASE64_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/yaml-cpp/contrib/anchordict.h

@@ -12,14 +12,17 @@
 #include "../anchor.h"
 
 namespace YAML {
-/// AnchorDict
-/// . An object that stores and retrieves values correlating to anchor_t
-///   values.
-/// . Efficient implementation that can make assumptions about how anchor_t
-///   values are assigned by the Parser class.
+/**
+ * An object that stores and retrieves values correlating to {@link anchor_t}
+ * values.
+ *
+ * <p>Efficient implementation that can make assumptions about how
+ * {@code anchor_t} values are assigned by the {@link Parser} class.
+ */
 template <class T>
 class AnchorDict {
  public:
+  AnchorDict() : m_data{} {}
   void Register(anchor_t anchor, T value) {
     if (anchor > m_data.size()) {
       m_data.resize(anchor);
@@ -32,6 +35,6 @@ class AnchorDict {
  private:
   std::vector<T> m_data;
 };
-}
+}  // namespace YAML
 
 #endif  // ANCHORDICT_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/yaml-cpp/contrib/graphbuilder.h

@@ -15,10 +15,12 @@ class Parser;
 
 // GraphBuilderInterface
 // . Abstraction of node creation
-// . pParentNode is always NULL or the return value of one of the NewXXX()
+// . pParentNode is always nullptr or the return value of one of the NewXXX()
 //   functions.
 class GraphBuilderInterface {
  public:
+  virtual ~GraphBuilderInterface() = 0;
+
   // Create and return a new node with a null value.
   virtual void *NewNull(const Mark &mark, void *pParentNode) = 0;
 
@@ -71,9 +73,9 @@ class GraphBuilder : public GraphBuilderInterface {
   typedef typename Impl::Map Map;
 
   GraphBuilder(Impl &impl) : m_impl(impl) {
-    Map *pMap = NULL;
-    Sequence *pSeq = NULL;
-    Node *pNode = NULL;
+    Map *pMap = nullptr;
+    Sequence *pSeq = nullptr;
+    Node *pNode = nullptr;
 
     // Type consistency checks
     pNode = pMap;

include/yaml-cpp/depthguard.h

@@ -0,0 +1,77 @@
+#ifndef DEPTH_GUARD_H_00000000000000000000000000000000000000000000000000000000
+#define DEPTH_GUARD_H_00000000000000000000000000000000000000000000000000000000
+
+#if defined(_MSC_VER) ||                                            \
+    (defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || \
+     (__GNUC__ >= 4))  // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
+#include "exceptions.h"
+
+namespace YAML {
+
+/**
+ * @brief The DeepRecursion class
+ *  An exception class which is thrown by DepthGuard. Ideally it should be
+ * a member of DepthGuard. However, DepthGuard is a templated class which means
+ * that any catch points would then need to know the template parameters. It is
+ * simpler for clients to not have to know at the catch point what was the
+ * maximum depth.
+ */
+class DeepRecursion : public ParserException {
+public:
+  virtual ~DeepRecursion() = default;
+
+  DeepRecursion(int depth, const Mark& mark_, const std::string& msg_);
+
+  // Returns the recursion depth when the exception was thrown
+  int depth() const {
+    return m_depth;
+  }
+
+private:
+  int m_depth = 0;
+};
+
+/**
+ * @brief The DepthGuard class
+ *  DepthGuard takes a reference to an integer. It increments the integer upon
+ * construction of DepthGuard and decrements the integer upon destruction.
+ *
+ * If the integer would be incremented past max_depth, then an exception is
+ * thrown. This is ideally geared toward guarding against deep recursion.
+ *
+ * @param max_depth
+ *  compile-time configurable maximum depth.
+ */
+template <int max_depth = 2000>
+class DepthGuard final {
+public:
+  DepthGuard(int & depth_, const Mark& mark_, const std::string& msg_) : m_depth(depth_) {
+    ++m_depth;
+    if ( max_depth <= m_depth ) {
+        throw DeepRecursion{m_depth, mark_, msg_};
+    }
+  }
+
+  DepthGuard(const DepthGuard & copy_ctor) = delete;
+  DepthGuard(DepthGuard && move_ctor) = delete;
+  DepthGuard & operator=(const DepthGuard & copy_assign) = delete;
+  DepthGuard & operator=(DepthGuard && move_assign) = delete;
+
+  ~DepthGuard() {
+    --m_depth;
+  }
+
+  int current_depth() const {
+    return m_depth;
+  }
+
+private:
+    int & m_depth;
+};
+
+} // namespace YAML
+
+#endif // DEPTH_GUARD_H_00000000000000000000000000000000000000000000000000000000

include/yaml-cpp/dll.h

@@ -8,16 +8,12 @@
 #endif
 
 // The following ifdef block is the standard way of creating macros which make
-// exporting
-// from a DLL simpler. All files within this DLL are compiled with the
-// yaml_cpp_EXPORTS
-// symbol defined on the command line. this symbol should not be defined on any
-// project
-// that uses this DLL. This way any other project whose source files include
-// this file see
-// YAML_CPP_API functions as being imported from a DLL, whereas this DLL sees
-// symbols
-// defined with this macro as being exported.
+// exporting from a DLL simpler. All files within this DLL are compiled with the
+// yaml_cpp_EXPORTS symbol defined on the command line. This symbol should not
+// be defined on any project that uses this DLL. This way any other project
+// whose source files include this file see YAML_CPP_API functions as being
+// imported from a DLL, whereas this DLL sees symbols defined with this macro as
+// being exported.
 #undef YAML_CPP_API
 
 #ifdef YAML_CPP_DLL      // Using or Building YAML-CPP DLL (definition defined

include/yaml-cpp/emitfromevents.h

@@ -24,21 +24,21 @@ class EmitFromEvents : public EventHandler {
  public:
   EmitFromEvents(Emitter& emitter);
 
-  virtual void OnDocumentStart(const Mark& mark);
-  virtual void OnDocumentEnd();
+  void OnDocumentStart(const Mark& mark) override;
+  void OnDocumentEnd() override;
 
-  virtual void OnNull(const Mark& mark, anchor_t anchor);
-  virtual void OnAlias(const Mark& mark, anchor_t anchor);
-  virtual void OnScalar(const Mark& mark, const std::string& tag,
-                        anchor_t anchor, const std::string& value);
+  void OnNull(const Mark& mark, anchor_t anchor) override;
+  void OnAlias(const Mark& mark, anchor_t anchor) override;
+  void OnScalar(const Mark& mark, const std::string& tag,
+                        anchor_t anchor, const std::string& value) override;
 
-  virtual void OnSequenceStart(const Mark& mark, const std::string& tag,
-                               anchor_t anchor, EmitterStyle::value style);
-  virtual void OnSequenceEnd();
+  void OnSequenceStart(const Mark& mark, const std::string& tag,
+                               anchor_t anchor, EmitterStyle::value style) override;
+  void OnSequenceEnd() override;
 
-  virtual void OnMapStart(const Mark& mark, const std::string& tag,
-                          anchor_t anchor, EmitterStyle::value style);
-  virtual void OnMapEnd();
+  void OnMapStart(const Mark& mark, const std::string& tag,
+                          anchor_t anchor, EmitterStyle::value style) override;
+  void OnMapEnd() override;
 
  private:
   void BeginNode();

include/yaml-cpp/emitter.h

@@ -7,16 +7,18 @@
 #pragma once
 #endif
 
+#include <cmath>
 #include <cstddef>
+#include <limits>
 #include <memory>
 #include <sstream>
 #include <string>
+#include <type_traits>
 
 #include "yaml-cpp/binary.h"
 #include "yaml-cpp/dll.h"
 #include "yaml-cpp/emitterdef.h"
 #include "yaml-cpp/emittermanip.h"
-#include "yaml-cpp/noncopyable.h"
 #include "yaml-cpp/null.h"
 #include "yaml-cpp/ostream_wrapper.h"
 
@@ -28,10 +30,12 @@ struct _Null;
 namespace YAML {
 class EmitterState;
 
-class YAML_CPP_API Emitter : private noncopyable {
+class YAML_CPP_API Emitter {
  public:
   Emitter();
   explicit Emitter(std::ostream& stream);
+  Emitter(const Emitter&) = delete;
+  Emitter& operator=(const Emitter&) = delete;
   ~Emitter();
 
   // output
@@ -46,6 +50,7 @@ class YAML_CPP_API Emitter : private noncopyable {
   bool SetOutputCharset(EMITTER_MANIP value);
   bool SetStringFormat(EMITTER_MANIP value);
   bool SetBoolFormat(EMITTER_MANIP value);
+  bool SetNullFormat(EMITTER_MANIP value);
   bool SetIntBase(EMITTER_MANIP value);
   bool SetSeqFormat(EMITTER_MANIP value);
   bool SetMapFormat(EMITTER_MANIP value);
@@ -54,6 +59,7 @@ class YAML_CPP_API Emitter : private noncopyable {
   bool SetPostCommentIndent(std::size_t n);
   bool SetFloatPrecision(std::size_t n);
   bool SetDoublePrecision(std::size_t n);
+  void RestoreGlobalModifiedSettings();
 
   // local setters
   Emitter& SetLocalValue(EMITTER_MANIP value);
@@ -119,10 +125,11 @@ class YAML_CPP_API Emitter : private noncopyable {
   void SpaceOrIndentTo(bool requireSpace, std::size_t indent);
 
   const char* ComputeFullBoolName(bool b) const;
+  const char* ComputeNullName() const;
   bool CanEmitNewline() const;
 
  private:
-  std::auto_ptr<EmitterState> m_pState;
+  std::unique_ptr<EmitterState> m_pState;
   ostream_wrapper m_stream;
 };
 
@@ -152,7 +159,27 @@ inline Emitter& Emitter::WriteStreamable(T value) {
 
   std::stringstream stream;
   SetStreamablePrecision<T>(stream);
-  stream << value;
+
+  bool special = false;
+  if (std::is_floating_point<T>::value) {
+    if ((std::numeric_limits<T>::has_quiet_NaN ||
+         std::numeric_limits<T>::has_signaling_NaN) &&
+        std::isnan(value)) {
+      special = true;
+      stream << ".nan";
+    } else if (std::numeric_limits<T>::has_infinity && std::isinf(value)) {
+      special = true;
+      if (std::signbit(value)) {
+        stream << "-.inf";
+      } else {
+        stream << ".inf";
+      }
+    }
+  }
+
+  if (!special) {
+    stream << value;
+  }
   m_stream << stream.str();
 
   StartedScalar();
@@ -162,12 +189,12 @@ inline Emitter& Emitter::WriteStreamable(T value) {
 
 template <>
 inline void Emitter::SetStreamablePrecision<float>(std::stringstream& stream) {
-  stream.precision(GetFloatPrecision());
+  stream.precision(static_cast<std::streamsize>(GetFloatPrecision()));
 }
 
 template <>
 inline void Emitter::SetStreamablePrecision<double>(std::stringstream& stream) {
-  stream.precision(GetDoublePrecision());
+  stream.precision(static_cast<std::streamsize>(GetDoublePrecision()));
 }
 
 // overloads of insertion
@@ -249,6 +276,6 @@ inline Emitter& operator<<(Emitter& emitter, _Indent indent) {
 inline Emitter& operator<<(Emitter& emitter, _Precision precision) {
   return emitter.SetLocalPrecision(precision);
 }
-}
+}  // namespace YAML
 
 #endif  // EMITTER_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/yaml-cpp/emittermanip.h

@@ -19,6 +19,7 @@ enum EMITTER_MANIP {
   // output character set
   EmitNonAscii,
   EscapeNonAscii,
+  EscapeAsJson,
 
   // string manipulators
   // Auto, // duplicate
@@ -26,6 +27,12 @@ enum EMITTER_MANIP {
   DoubleQuoted,
   Literal,
 
+  // null manipulators
+  LowerNull,
+  UpperNull,
+  CamelNull,
+  TildeNull,
+
   // bool manipulators
   YesNoBool,      // yes, no
   TrueFalseBool,  // true, false
@@ -74,14 +81,14 @@ struct _Alias {
   std::string content;
 };
 
-inline _Alias Alias(const std::string content) { return _Alias(content); }
+inline _Alias Alias(const std::string& content) { return _Alias(content); }
 
 struct _Anchor {
   _Anchor(const std::string& content_) : content(content_) {}
   std::string content;
 };
 
-inline _Anchor Anchor(const std::string content) { return _Anchor(content); }
+inline _Anchor Anchor(const std::string& content) { return _Anchor(content); }
 
 struct _Tag {
   struct Type {
@@ -96,11 +103,11 @@ struct _Tag {
   Type::value type;
 };
 
-inline _Tag VerbatimTag(const std::string content) {
+inline _Tag VerbatimTag(const std::string& content) {
   return _Tag("", content, _Tag::Type::Verbatim);
 }
 
-inline _Tag LocalTag(const std::string content) {
+inline _Tag LocalTag(const std::string& content) {
   return _Tag("", content, _Tag::Type::PrimaryHandle);
 }
 
@@ -108,7 +115,7 @@ inline _Tag LocalTag(const std::string& prefix, const std::string content) {
   return _Tag(prefix, content, _Tag::Type::NamedHandle);
 }
 
-inline _Tag SecondaryTag(const std::string content) {
+inline _Tag SecondaryTag(const std::string& content) {
   return _Tag("", content, _Tag::Type::NamedHandle);
 }
 
@@ -117,7 +124,7 @@ struct _Comment {
   std::string content;
 };
 
-inline _Comment Comment(const std::string content) { return _Comment(content); }
+inline _Comment Comment(const std::string& content) { return _Comment(content); }
 
 struct _Precision {
   _Precision(int floatPrecision_, int doublePrecision_)

include/yaml-cpp/eventhandler.h

@@ -17,7 +17,7 @@ struct Mark;
 
 class EventHandler {
  public:
-  virtual ~EventHandler() {}
+  virtual ~EventHandler() = default;
 
   virtual void OnDocumentStart(const Mark& mark) = 0;
   virtual void OnDocumentEnd() = 0;
@@ -34,7 +34,12 @@ class EventHandler {
   virtual void OnMapStart(const Mark& mark, const std::string& tag,
                           anchor_t anchor, EmitterStyle::value style) = 0;
   virtual void OnMapEnd() = 0;
+
+  virtual void OnAnchor(const Mark& /*mark*/,
+                        const std::string& /*anchor_name*/) {
+    // empty default implementation for compatibility
+  }
 };
-}
+}  // namespace YAML
 
 #endif  // EVENTHANDLER_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/yaml-cpp/exceptions.h

@@ -8,10 +8,11 @@
 #endif
 
 #include "yaml-cpp/mark.h"
+#include "yaml-cpp/noexcept.h"
 #include "yaml-cpp/traits.h"
+#include <sstream>
 #include <stdexcept>
 #include <string>
-#include <sstream>
 
 namespace YAML {
 // error messages
@@ -64,7 +65,7 @@ const char* const ZERO_INDENT_IN_BLOCK =
 const char* const CHAR_IN_BLOCK = "unexpected character in block scalar";
 const char* const AMBIGUOUS_ANCHOR =
     "cannot assign the same alias to multiple nodes";
-const char* const UNKNOWN_ANCHOR = "the referenced anchor is not defined";
+const char* const UNKNOWN_ANCHOR = "the referenced anchor is not defined: ";
 
 const char* const INVALID_NODE =
     "invalid node; this may result from using a map iterator as a sequence "
@@ -89,7 +90,7 @@ const char* const BAD_FILE = "bad file";
 
 template <typename T>
 inline const std::string KEY_NOT_FOUND_WITH_KEY(
-    const T&, typename disable_if<is_numeric<T> >::type* = 0) {
+    const T&, typename disable_if<is_numeric<T>>::type* = 0) {
   return KEY_NOT_FOUND;
 }
 
@@ -99,20 +100,63 @@ inline const std::string KEY_NOT_FOUND_WITH_KEY(const std::string& key) {
   return stream.str();
 }
 
-template <typename T>
-inline const std::string KEY_NOT_FOUND_WITH_KEY(
-    const T& key, typename enable_if<is_numeric<T> >::type* = 0) {
+inline const std::string KEY_NOT_FOUND_WITH_KEY(const char* key) {
   std::stringstream stream;
   stream << KEY_NOT_FOUND << ": " << key;
   return stream.str();
 }
+
+template <typename T>
+inline const std::string KEY_NOT_FOUND_WITH_KEY(
+    const T& key, typename enable_if<is_numeric<T>>::type* = 0) {
+  std::stringstream stream;
+  stream << KEY_NOT_FOUND << ": " << key;
+  return stream.str();
 }
 
-class Exception : public std::runtime_error {
+template <typename T>
+inline const std::string BAD_SUBSCRIPT_WITH_KEY(
+    const T&, typename disable_if<is_numeric<T>>::type* = nullptr) {
+  return BAD_SUBSCRIPT;
+}
+
+inline const std::string BAD_SUBSCRIPT_WITH_KEY(const std::string& key) {
+  std::stringstream stream;
+  stream << BAD_SUBSCRIPT << " (key: \"" << key << "\")";
+  return stream.str();
+}
+
+inline const std::string BAD_SUBSCRIPT_WITH_KEY(const char* key) {
+  std::stringstream stream;
+  stream << BAD_SUBSCRIPT << " (key: \"" << key << "\")";
+  return stream.str();
+}
+
+template <typename T>
+inline const std::string BAD_SUBSCRIPT_WITH_KEY(
+    const T& key, typename enable_if<is_numeric<T>>::type* = nullptr) {
+  std::stringstream stream;
+  stream << BAD_SUBSCRIPT << " (key: \"" << key << "\")";
+  return stream.str();
+}
+
+inline const std::string INVALID_NODE_WITH_KEY(const std::string& key) {
+  std::stringstream stream;
+  if (key.empty()) {
+    return INVALID_NODE;
+  }
+  stream << "invalid node; first invalid key: \"" << key << "\"";
+  return stream.str();
+}
+}  // namespace ErrorMsg
+
+class YAML_CPP_API Exception : public std::runtime_error {
  public:
   Exception(const Mark& mark_, const std::string& msg_)
       : std::runtime_error(build_what(mark_, msg_)), mark(mark_), msg(msg_) {}
-  virtual ~Exception() throw() {}
+  ~Exception() YAML_CPP_NOEXCEPT override;
+
+  Exception(const Exception&) = default;
 
   Mark mark;
   std::string msg;
@@ -120,6 +164,10 @@ class Exception : public std::runtime_error {
  private:
   static const std::string build_what(const Mark& mark,
                                       const std::string& msg) {
+    if (mark.is_null()) {
+      return msg;
+    }
+
     std::stringstream output;
     output << "yaml-cpp: error at line " << mark.line + 1 << ", column "
            << mark.column + 1 << ": " << msg;
@@ -127,39 +175,47 @@ class Exception : public std::runtime_error {
   }
 };
 
-class ParserException : public Exception {
+class YAML_CPP_API ParserException : public Exception {
  public:
   ParserException(const Mark& mark_, const std::string& msg_)
       : Exception(mark_, msg_) {}
+  ParserException(const ParserException&) = default;
+  ~ParserException() YAML_CPP_NOEXCEPT override;
 };
 
-class RepresentationException : public Exception {
+class YAML_CPP_API RepresentationException : public Exception {
  public:
   RepresentationException(const Mark& mark_, const std::string& msg_)
       : Exception(mark_, msg_) {}
+  RepresentationException(const RepresentationException&) = default;
+  ~RepresentationException() YAML_CPP_NOEXCEPT override;
 };
 
 // representation exceptions
-class InvalidScalar : public RepresentationException {
+class YAML_CPP_API InvalidScalar : public RepresentationException {
  public:
   InvalidScalar(const Mark& mark_)
       : RepresentationException(mark_, ErrorMsg::INVALID_SCALAR) {}
+  InvalidScalar(const InvalidScalar&) = default;
+  ~InvalidScalar() YAML_CPP_NOEXCEPT override;
 };
 
-class KeyNotFound : public RepresentationException {
+class YAML_CPP_API KeyNotFound : public RepresentationException {
  public:
   template <typename T>
   KeyNotFound(const Mark& mark_, const T& key_)
       : RepresentationException(mark_, ErrorMsg::KEY_NOT_FOUND_WITH_KEY(key_)) {
   }
+  KeyNotFound(const KeyNotFound&) = default;
+  ~KeyNotFound() YAML_CPP_NOEXCEPT override;
 };
 
 template <typename T>
-class TypedKeyNotFound : public KeyNotFound {
+class YAML_CPP_API TypedKeyNotFound : public KeyNotFound {
  public:
   TypedKeyNotFound(const Mark& mark_, const T& key_)
       : KeyNotFound(mark_, key_), key(key_) {}
-  virtual ~TypedKeyNotFound() throw() {}
+  ~TypedKeyNotFound() YAML_CPP_NOEXCEPT override = default;
 
   T key;
 };
@@ -170,58 +226,78 @@ inline TypedKeyNotFound<T> MakeTypedKeyNotFound(const Mark& mark,
   return TypedKeyNotFound<T>(mark, key);
 }
 
-class InvalidNode : public RepresentationException {
+class YAML_CPP_API InvalidNode : public RepresentationException {
  public:
-  InvalidNode()
-      : RepresentationException(Mark::null_mark(), ErrorMsg::INVALID_NODE) {}
+  InvalidNode(const std::string& key)
+      : RepresentationException(Mark::null_mark(),
+                                ErrorMsg::INVALID_NODE_WITH_KEY(key)) {}
+  InvalidNode(const InvalidNode&) = default;
+  ~InvalidNode() YAML_CPP_NOEXCEPT override;
 };
 
-class BadConversion : public RepresentationException {
+class YAML_CPP_API BadConversion : public RepresentationException {
  public:
-  BadConversion()
-      : RepresentationException(Mark::null_mark(), ErrorMsg::BAD_CONVERSION) {}
+  explicit BadConversion(const Mark& mark_)
+      : RepresentationException(mark_, ErrorMsg::BAD_CONVERSION) {}
+  BadConversion(const BadConversion&) = default;
+  ~BadConversion() YAML_CPP_NOEXCEPT override;
 };
 
 template <typename T>
 class TypedBadConversion : public BadConversion {
  public:
-  TypedBadConversion() : BadConversion() {}
+  explicit TypedBadConversion(const Mark& mark_) : BadConversion(mark_) {}
 };
 
-class BadDereference : public RepresentationException {
+class YAML_CPP_API BadDereference : public RepresentationException {
  public:
   BadDereference()
       : RepresentationException(Mark::null_mark(), ErrorMsg::BAD_DEREFERENCE) {}
+  BadDereference(const BadDereference&) = default;
+  ~BadDereference() YAML_CPP_NOEXCEPT override;
 };
 
-class BadSubscript : public RepresentationException {
+class YAML_CPP_API BadSubscript : public RepresentationException {
  public:
-  BadSubscript()
-      : RepresentationException(Mark::null_mark(), ErrorMsg::BAD_SUBSCRIPT) {}
+  template <typename Key>
+  BadSubscript(const Mark& mark_, const Key& key)
+      : RepresentationException(mark_, ErrorMsg::BAD_SUBSCRIPT_WITH_KEY(key)) {}
+  BadSubscript(const BadSubscript&) = default;
+  ~BadSubscript() YAML_CPP_NOEXCEPT override;
 };
 
-class BadPushback : public RepresentationException {
+class YAML_CPP_API BadPushback : public RepresentationException {
  public:
   BadPushback()
       : RepresentationException(Mark::null_mark(), ErrorMsg::BAD_PUSHBACK) {}
+  BadPushback(const BadPushback&) = default;
+  ~BadPushback() YAML_CPP_NOEXCEPT override;
 };
 
-class BadInsert : public RepresentationException {
+class YAML_CPP_API BadInsert : public RepresentationException {
  public:
   BadInsert()
       : RepresentationException(Mark::null_mark(), ErrorMsg::BAD_INSERT) {}
+  BadInsert(const BadInsert&) = default;
+  ~BadInsert() YAML_CPP_NOEXCEPT override;
 };
 
-class EmitterException : public Exception {
+class YAML_CPP_API EmitterException : public Exception {
  public:
   EmitterException(const std::string& msg_)
       : Exception(Mark::null_mark(), msg_) {}
+  EmitterException(const EmitterException&) = default;
+  ~EmitterException() YAML_CPP_NOEXCEPT override;
 };
 
-class BadFile : public Exception {
+class YAML_CPP_API BadFile : public Exception {
  public:
-  BadFile() : Exception(Mark::null_mark(), ErrorMsg::BAD_FILE) {}
+  explicit BadFile(const std::string& filename)
+      : Exception(Mark::null_mark(),
+                  std::string(ErrorMsg::BAD_FILE) + ": " + filename) {}
+  BadFile(const BadFile&) = default;
+  ~BadFile() YAML_CPP_NOEXCEPT override;
 };
-}
+}  // namespace YAML
 
 #endif  // EXCEPTIONS_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/yaml-cpp/mark.h

@@ -15,6 +15,8 @@ struct YAML_CPP_API Mark {
 
   static const Mark null_mark() { return Mark(-1, -1, -1); }
 
+  bool is_null() const { return pos == -1 && line == -1 && column == -1; }
+
   int pos;
   int line, column;
 

include/yaml-cpp/node/convert.h

@@ -7,10 +7,13 @@
 #pragma once
 #endif
 
+#include <array>
+#include <cmath>
 #include <limits>
 #include <list>
 #include <map>
 #include <sstream>
+#include <type_traits>
 #include <vector>
 
 #include "yaml-cpp/binary.h"
@@ -20,6 +23,7 @@
 #include "yaml-cpp/node/type.h"
 #include "yaml-cpp/null.h"
 
+
 namespace YAML {
 class Binary;
 struct _Null;
@@ -43,6 +47,17 @@ inline bool IsNaN(const std::string& input) {
 }
 }
 
+// Node
+template <>
+struct convert<Node> {
+  static Node encode(const Node& rhs) { return rhs; }
+
+  static bool decode(const Node& node, Node& rhs) {
+    rhs.reset(node);
+    return true;
+  }
+};
+
 // std::string
 template <>
 struct convert<std::string> {
@@ -59,12 +74,17 @@ struct convert<std::string> {
 // C-strings can only be encoded
 template <>
 struct convert<const char*> {
-  static Node encode(const char*& rhs) { return Node(rhs); }
+  static Node encode(const char* rhs) { return Node(rhs); }
+};
+
+template <>
+struct convert<char*> {
+  static Node encode(const char* rhs) { return Node(rhs); }
 };
 
 template <std::size_t N>
-struct convert<const char[N]> {
-  static Node encode(const char(&rhs)[N]) { return Node(rhs); }
+struct convert<char[N]> {
+  static Node encode(const char* rhs) { return Node(rhs); }
 };
 
 template <>
@@ -76,42 +96,98 @@ struct convert<_Null> {
   }
 };
 
-#define YAML_DEFINE_CONVERT_STREAMABLE(type, negative_op)                \
-  template <>                                                            \
-  struct convert<type> {                                                 \
-    static Node encode(const type& rhs) {                                \
-      std::stringstream stream;                                          \
-      stream.precision(std::numeric_limits<type>::digits10 + 1);         \
-      stream << rhs;                                                     \
-      return Node(stream.str());                                         \
-    }                                                                    \
-                                                                         \
-    static bool decode(const Node& node, type& rhs) {                    \
-      if (node.Type() != NodeType::Scalar)                               \
-        return false;                                                    \
-      const std::string& input = node.Scalar();                          \
-      std::stringstream stream(input);                                   \
-      stream.unsetf(std::ios::dec);                                      \
-      if ((stream >> std::noskipws >> rhs) && (stream >> std::ws).eof()) \
-        return true;                                                     \
-      if (std::numeric_limits<type>::has_infinity) {                     \
-        if (conversion::IsInfinity(input)) {                             \
-          rhs = std::numeric_limits<type>::infinity();                   \
-          return true;                                                   \
-        } else if (conversion::IsNegativeInfinity(input)) {              \
-          rhs = negative_op std::numeric_limits<type>::infinity();       \
-          return true;                                                   \
-        }                                                                \
-      }                                                                  \
-                                                                         \
-      if (std::numeric_limits<type>::has_quiet_NaN &&                    \
-          conversion::IsNaN(input)) {                                    \
-        rhs = std::numeric_limits<type>::quiet_NaN();                    \
-        return true;                                                     \
-      }                                                                  \
-                                                                         \
-      return false;                                                      \
-    }                                                                    \
+namespace conversion {
+template <typename T>
+typename std::enable_if< std::is_floating_point<T>::value, void>::type
+inner_encode(const T& rhs, std::stringstream& stream){
+  if (std::isnan(rhs)) {
+    stream << ".nan";
+  } else if (std::isinf(rhs)) {
+    if (std::signbit(rhs)) {
+      stream << "-.inf";
+    } else {
+      stream << ".inf";
+    }
+  } else {
+    stream << rhs;
+  }
+}
+
+template <typename T>
+typename std::enable_if<!std::is_floating_point<T>::value, void>::type
+inner_encode(const T& rhs, std::stringstream& stream){
+  stream << rhs;
+}
+
+template <typename T>
+typename std::enable_if<(std::is_same<T, unsigned char>::value ||
+                         std::is_same<T, signed char>::value), bool>::type
+ConvertStreamTo(std::stringstream& stream, T& rhs) {
+  int num;
+  if ((stream >> std::noskipws >> num) && (stream >> std::ws).eof()) {
+    if (num >= (std::numeric_limits<T>::min)() &&
+        num <= (std::numeric_limits<T>::max)()) {
+      rhs = (T)num;
+      return true;
+    }
+  }
+  return false;
+}
+
+template <typename T>
+typename std::enable_if<!(std::is_same<T, unsigned char>::value ||
+                          std::is_same<T, signed char>::value), bool>::type
+ConvertStreamTo(std::stringstream& stream, T& rhs) {
+  if ((stream >> std::noskipws >> rhs) && (stream >> std::ws).eof()) {
+    return true;
+  }
+  return false;
+}
+}
+
+#define YAML_DEFINE_CONVERT_STREAMABLE(type, negative_op)                  \
+  template <>                                                              \
+  struct convert<type> {                                                   \
+                                                                           \
+    static Node encode(const type& rhs) {                                  \
+      std::stringstream stream;                                            \
+      stream.precision(std::numeric_limits<type>::max_digits10);           \
+      conversion::inner_encode(rhs, stream);                               \
+      return Node(stream.str());                                           \
+    }                                                                      \
+                                                                           \
+    static bool decode(const Node& node, type& rhs) {                      \
+      if (node.Type() != NodeType::Scalar) {                               \
+        return false;                                                      \
+      }                                                                    \
+      const std::string& input = node.Scalar();                            \
+      std::stringstream stream(input);                                     \
+      stream.unsetf(std::ios::dec);                                        \
+      if ((stream.peek() == '-') && std::is_unsigned<type>::value) {       \
+        return false;                                                      \
+      }                                                                    \
+      if (conversion::ConvertStreamTo(stream, rhs)) {                      \
+        return true;                                                       \
+      }                                                                    \
+      if (std::numeric_limits<type>::has_infinity) {                       \
+        if (conversion::IsInfinity(input)) {                               \
+          rhs = std::numeric_limits<type>::infinity();                     \
+          return true;                                                     \
+        } else if (conversion::IsNegativeInfinity(input)) {                \
+          rhs = negative_op std::numeric_limits<type>::infinity();         \
+          return true;                                                     \
+        }                                                                  \
+      }                                                                    \
+                                                                           \
+      if (std::numeric_limits<type>::has_quiet_NaN) {                      \
+        if (conversion::IsNaN(input)) {                                    \
+          rhs = std::numeric_limits<type>::quiet_NaN();                    \
+          return true;                                                     \
+        }                                                                  \
+      }                                                                    \
+                                                                           \
+      return false;                                                        \
+    }                                                                      \
   }
 
 #define YAML_DEFINE_CONVERT_STREAMABLE_SIGNED(type) \
@@ -150,89 +226,119 @@ struct convert<bool> {
 };
 
 // std::map
-template <typename K, typename V>
-struct convert<std::map<K, V> > {
-  static Node encode(const std::map<K, V>& rhs) {
+template <typename K, typename V, typename C, typename A>
+struct convert<std::map<K, V, C, A>> {
+  static Node encode(const std::map<K, V, C, A>& rhs) {
     Node node(NodeType::Map);
-    for (typename std::map<K, V>::const_iterator it = rhs.begin();
-         it != rhs.end(); ++it)
-      node.force_insert(it->first, it->second);
+    for (const auto& element : rhs)
+      node.force_insert(element.first, element.second);
     return node;
   }
 
-  static bool decode(const Node& node, std::map<K, V>& rhs) {
+  static bool decode(const Node& node, std::map<K, V, C, A>& rhs) {
     if (!node.IsMap())
       return false;
 
     rhs.clear();
-    for (const_iterator it = node.begin(); it != node.end(); ++it)
+    for (const auto& element : node)
 #if defined(__GNUC__) && __GNUC__ < 4
       // workaround for GCC 3:
-      rhs[it->first.template as<K>()] = it->second.template as<V>();
+      rhs[element.first.template as<K>()] = element.second.template as<V>();
 #else
-      rhs[it->first.as<K>()] = it->second.as<V>();
+      rhs[element.first.as<K>()] = element.second.as<V>();
 #endif
     return true;
   }
 };
 
 // std::vector
-template <typename T>
-struct convert<std::vector<T> > {
-  static Node encode(const std::vector<T>& rhs) {
+template <typename T, typename A>
+struct convert<std::vector<T, A>> {
+  static Node encode(const std::vector<T, A>& rhs) {
     Node node(NodeType::Sequence);
-    for (typename std::vector<T>::const_iterator it = rhs.begin();
-         it != rhs.end(); ++it)
-      node.push_back(*it);
+    for (const auto& element : rhs)
+      node.push_back(element);
     return node;
   }
 
-  static bool decode(const Node& node, std::vector<T>& rhs) {
+  static bool decode(const Node& node, std::vector<T, A>& rhs) {
     if (!node.IsSequence())
       return false;
 
     rhs.clear();
-    for (const_iterator it = node.begin(); it != node.end(); ++it)
+    for (const auto& element : node)
 #if defined(__GNUC__) && __GNUC__ < 4
       // workaround for GCC 3:
-      rhs.push_back(it->template as<T>());
+      rhs.push_back(element.template as<T>());
 #else
-      rhs.push_back(it->as<T>());
+      rhs.push_back(element.as<T>());
 #endif
     return true;
   }
 };
 
 // std::list
-template <typename T>
-struct convert<std::list<T> > {
-  static Node encode(const std::list<T>& rhs) {
+template <typename T, typename A>
+struct convert<std::list<T,A>> {
+  static Node encode(const std::list<T,A>& rhs) {
     Node node(NodeType::Sequence);
-    for (typename std::list<T>::const_iterator it = rhs.begin();
-         it != rhs.end(); ++it)
-      node.push_back(*it);
+    for (const auto& element : rhs)
+      node.push_back(element);
     return node;
   }
 
-  static bool decode(const Node& node, std::list<T>& rhs) {
+  static bool decode(const Node& node, std::list<T,A>& rhs) {
     if (!node.IsSequence())
       return false;
 
     rhs.clear();
-    for (const_iterator it = node.begin(); it != node.end(); ++it)
+    for (const auto& element : node)
 #if defined(__GNUC__) && __GNUC__ < 4
       // workaround for GCC 3:
-      rhs.push_back(it->template as<T>());
+      rhs.push_back(element.template as<T>());
 #else
-      rhs.push_back(it->as<T>());
+      rhs.push_back(element.as<T>());
 #endif
     return true;
   }
 };
 
+// std::array
+template <typename T, std::size_t N>
+struct convert<std::array<T, N>> {
+  static Node encode(const std::array<T, N>& rhs) {
+    Node node(NodeType::Sequence);
+    for (const auto& element : rhs) {
+      node.push_back(element);
+    }
+    return node;
+  }
+
+  static bool decode(const Node& node, std::array<T, N>& rhs) {
+    if (!isNodeValid(node)) {
+      return false;
+    }
+
+    for (auto i = 0u; i < node.size(); ++i) {
+#if defined(__GNUC__) && __GNUC__ < 4
+      // workaround for GCC 3:
+      rhs[i] = node[i].template as<T>();
+#else
+      rhs[i] = node[i].as<T>();
+#endif
+    }
+    return true;
+  }
+
+ private:
+  static bool isNodeValid(const Node& node) {
+    return node.IsSequence() && node.size() == N;
+  }
+};
+
 // std::pair
 template <typename T, typename U>
-struct convert<std::pair<T, U> > {
+struct convert<std::pair<T, U>> {
   static Node encode(const std::pair<T, U>& rhs) {
     Node node(NodeType::Sequence);
     node.push_back(rhs.first);

include/yaml-cpp/node/detail/bool_type.h

@@ -1,26 +0,0 @@
-#ifndef NODE_DETAIL_BOOL_TYPE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
-#define NODE_DETAIL_BOOL_TYPE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
-
-#if defined(_MSC_VER) ||                                            \
-    (defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || \
-     (__GNUC__ >= 4))  // GCC supports "pragma once" correctly since 3.4
-#pragma once
-#endif
-
-namespace YAML {
-namespace detail {
-struct unspecified_bool {
-  struct NOT_ALLOWED;
-  static void true_value(NOT_ALLOWED*) {}
-};
-typedef void (*unspecified_bool_type)(unspecified_bool::NOT_ALLOWED*);
-}
-}
-
-#define YAML_CPP_OPERATOR_BOOL()                                            \
-  operator YAML::detail::unspecified_bool_type() const {                    \
-    return this->operator!() ? 0                                            \
-                             : &YAML::detail::unspecified_bool::true_value; \
-  }
-
-#endif  // NODE_DETAIL_BOOL_TYPE_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/yaml-cpp/node/detail/impl.h

@@ -9,7 +9,9 @@
 
 #include "yaml-cpp/node/detail/node.h"
 #include "yaml-cpp/node/detail/node_data.h"
-#include <boost/type_traits.hpp>
+
+#include <algorithm>
+#include <type_traits>
 
 namespace YAML {
 namespace detail {
@@ -17,23 +19,23 @@ template <typename Key, typename Enable = void>
 struct get_idx {
   static node* get(const std::vector<node*>& /* sequence */,
                    const Key& /* key */, shared_memory_holder /* pMemory */) {
-    return 0;
+    return nullptr;
   }
 };
 
 template <typename Key>
-struct get_idx<
-    Key, typename boost::enable_if_c<boost::is_unsigned<Key>::value &&
-                                     !boost::is_same<Key, bool>::value>::type> {
+struct get_idx<Key,
+               typename std::enable_if<std::is_unsigned<Key>::value &&
+                                       !std::is_same<Key, bool>::value>::type> {
   static node* get(const std::vector<node*>& sequence, const Key& key,
                    shared_memory_holder /* pMemory */) {
-    return key < sequence.size() ? sequence[key] : 0;
+    return key < sequence.size() ? sequence[key] : nullptr;
   }
 
   static node* get(std::vector<node*>& sequence, const Key& key,
                    shared_memory_holder pMemory) {
-    if (key > sequence.size())
-      return 0;
+    if (key > sequence.size() || (key > 0 && !sequence[key - 1]->is_defined()))
+      return nullptr;
     if (key == sequence.size())
       sequence.push_back(&pMemory->create_node());
     return sequence[key];
@@ -41,18 +43,56 @@ struct get_idx<
 };
 
 template <typename Key>
-struct get_idx<Key, typename boost::enable_if<boost::is_signed<Key> >::type> {
+struct get_idx<Key, typename std::enable_if<std::is_signed<Key>::value>::type> {
   static node* get(const std::vector<node*>& sequence, const Key& key,
                    shared_memory_holder pMemory) {
     return key >= 0 ? get_idx<std::size_t>::get(
                           sequence, static_cast<std::size_t>(key), pMemory)
-                    : 0;
+                    : nullptr;
   }
   static node* get(std::vector<node*>& sequence, const Key& key,
                    shared_memory_holder pMemory) {
     return key >= 0 ? get_idx<std::size_t>::get(
                           sequence, static_cast<std::size_t>(key), pMemory)
-                    : 0;
+                    : nullptr;
+  }
+};
+
+template <typename Key, typename Enable = void>
+struct remove_idx {
+  static bool remove(std::vector<node*>&, const Key&, std::size_t&) {
+    return false;
+  }
+};
+
+template <typename Key>
+struct remove_idx<
+    Key, typename std::enable_if<std::is_unsigned<Key>::value &&
+                                 !std::is_same<Key, bool>::value>::type> {
+
+  static bool remove(std::vector<node*>& sequence, const Key& key,
+                     std::size_t& seqSize) {
+    if (key >= sequence.size()) {
+      return false;
+    } else {
+      sequence.erase(sequence.begin() + key);
+      if (seqSize > key) {
+          --seqSize;
+      }
+      return true;
+    }
+  }
+};
+
+template <typename Key>
+struct remove_idx<Key,
+                  typename std::enable_if<std::is_signed<Key>::value>::type> {
+
+  static bool remove(std::vector<node*>& sequence, const Key& key,
+                     std::size_t& seqSize) {
+    return key >= 0 ? remove_idx<std::size_t>::remove(
+                          sequence, static_cast<std::size_t>(key), seqSize)
+                    : false;
   }
 };
 
@@ -66,7 +106,11 @@ inline bool node::equals(const T& rhs, shared_memory_holder pMemory) {
 }
 
 inline bool node::equals(const char* rhs, shared_memory_holder pMemory) {
-  return equals<std::string>(rhs, pMemory);
+  std::string lhs;
+  if (convert<std::string>::decode(Node(*this, std::move(pMemory)), lhs)) {
+    return lhs == rhs;
+  }
+  return false;
 }
 
 // indexing
@@ -78,22 +122,20 @@ inline node* node_data::get(const Key& key,
       break;
     case NodeType::Undefined:
     case NodeType::Null:
-      return NULL;
+      return nullptr;
     case NodeType::Sequence:
       if (node* pNode = get_idx<Key>::get(m_sequence, key, pMemory))
         return pNode;
-      return NULL;
+      return nullptr;
     case NodeType::Scalar:
-      throw BadSubscript();
+      throw BadSubscript(m_mark, key);
   }
 
-  for (node_map::const_iterator it = m_map.begin(); it != m_map.end(); ++it) {
-    if (it->first->equals(key, pMemory)) {
-      return it->second;
-    }
-  }
+  auto it = std::find_if(m_map.begin(), m_map.end(), [&](const kv_pair m) {
+    return m.first->equals(key, pMemory);
+  });
 
-  return NULL;
+  return it != m_map.end() ? it->second : nullptr;
 }
 
 template <typename Key>
@@ -112,13 +154,15 @@ inline node& node_data::get(const Key& key, shared_memory_holder pMemory) {
       convert_to_map(pMemory);
       break;
     case NodeType::Scalar:
-      throw BadSubscript();
+      throw BadSubscript(m_mark, key);
   }
 
-  for (node_map::const_iterator it = m_map.begin(); it != m_map.end(); ++it) {
-    if (it->first->equals(key, pMemory)) {
-      return *it->second;
-    }
+  auto it = std::find_if(m_map.begin(), m_map.end(), [&](const kv_pair m) {
+    return m.first->equals(key, pMemory);
+  });
+
+  if (it != m_map.end()) {
+    return *it->second;
   }
 
   node& k = convert_to_node(key, pMemory);
@@ -129,12 +173,26 @@ inline node& node_data::get(const Key& key, shared_memory_holder pMemory) {
 
 template <typename Key>
 inline bool node_data::remove(const Key& key, shared_memory_holder pMemory) {
-  if (m_type != NodeType::Map)
-    return false;
+  if (m_type == NodeType::Sequence) {
+    return remove_idx<Key>::remove(m_sequence, key, m_seqSize);
+  }
 
-  for (node_map::iterator it = m_map.begin(); it != m_map.end(); ++it) {
-    if (equals(*it->first, key, pMemory)) {
-      m_map.erase(it);
+  if (m_type == NodeType::Map) {
+    kv_pairs::iterator it = m_undefinedPairs.begin();
+    while (it != m_undefinedPairs.end()) {
+      kv_pairs::iterator jt = std::next(it);
+      if (it->first->equals(key, pMemory)) {
+        m_undefinedPairs.erase(it);
+      }
+      it = jt;
+    }
+
+    auto iter = std::find_if(m_map.begin(), m_map.end(), [&](const kv_pair m) {
+      return m.first->equals(key, pMemory);
+    });
+
+    if (iter != m_map.end()) {
+      m_map.erase(iter);
       return true;
     }
   }

include/yaml-cpp/node/detail/iterator.h

@@ -8,47 +8,75 @@
 #endif
 
 #include "yaml-cpp/dll.h"
-#include "yaml-cpp/node/ptr.h"
 #include "yaml-cpp/node/detail/node_iterator.h"
-#include <boost/iterator/iterator_adaptor.hpp>
-#include <boost/utility.hpp>
+#include "yaml-cpp/node/node.h"
+#include "yaml-cpp/node/ptr.h"
+#include <cstddef>
+#include <iterator>
+
 
 namespace YAML {
 namespace detail {
 struct iterator_value;
 
 template <typename V>
-class iterator_base
-    : public boost::iterator_adaptor<iterator_base<V>, node_iterator, V,
-                                     std::forward_iterator_tag, V> {
+class iterator_base {
+
  private:
   template <typename>
   friend class iterator_base;
   struct enabler {};
-  typedef typename iterator_base::base_type base_type;
+  using base_type = node_iterator;
+
+  struct proxy {
+    explicit proxy(const V& x) : m_ref(x) {}
+    V* operator->() { return std::addressof(m_ref); }
+    operator V*() { return std::addressof(m_ref); }
+
+    V m_ref;
+  };
 
  public:
-  typedef typename iterator_base::value_type value_type;
+  using iterator_category = std::forward_iterator_tag;
+  using value_type = V;
+  using difference_type = std::ptrdiff_t;
+  using pointer = V*;
+  using reference = V;
 
  public:
-  iterator_base() {}
+  iterator_base() : m_iterator(), m_pMemory() {}
   explicit iterator_base(base_type rhs, shared_memory_holder pMemory)
-      : iterator_base::iterator_adaptor_(rhs), m_pMemory(pMemory) {}
+      : m_iterator(rhs), m_pMemory(pMemory) {}
 
   template <class W>
   iterator_base(const iterator_base<W>& rhs,
-                typename boost::enable_if<boost::is_convertible<W*, V*>,
-                                          enabler>::type = enabler())
-      : iterator_base::iterator_adaptor_(rhs.base()),
-        m_pMemory(rhs.m_pMemory) {}
+                typename std::enable_if<std::is_convertible<W*, V*>::value,
+                                        enabler>::type = enabler())
+      : m_iterator(rhs.m_iterator), m_pMemory(rhs.m_pMemory) {}
 
- private:
-  friend class boost::iterator_core_access;
+  iterator_base<V>& operator++() {
+    ++m_iterator;
+    return *this;
+  }
 
-  void increment() { this->base_reference() = boost::next(this->base()); }
+  iterator_base<V> operator++(int) {
+    iterator_base<V> iterator_pre(*this);
+    ++(*this);
+    return iterator_pre;
+  }
 
-  value_type dereference() const {
-    const typename base_type::value_type& v = *this->base();
+  template <typename W>
+  bool operator==(const iterator_base<W>& rhs) const {
+    return m_iterator == rhs.m_iterator;
+  }
+
+  template <typename W>
+  bool operator!=(const iterator_base<W>& rhs) const {
+    return m_iterator != rhs.m_iterator;
+  }
+
+  value_type operator*() const {
+    const typename base_type::value_type& v = *m_iterator;
     if (v.pNode)
       return value_type(Node(*v, m_pMemory));
     if (v.first && v.second)
@@ -56,10 +84,13 @@ class iterator_base
     return value_type();
   }
 
+  proxy operator->() const { return proxy(**this); }
+
  private:
+  base_type m_iterator;
   shared_memory_holder m_pMemory;
 };
-}
-}
+}  // namespace detail
+}  // namespace YAML
 
 #endif  // VALUE_DETAIL_ITERATOR_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/yaml-cpp/node/detail/iterator_fwd.h

@@ -13,7 +13,6 @@
 #include <vector>
 
 namespace YAML {
-class node;
 
 namespace detail {
 struct iterator_value;
@@ -21,8 +20,8 @@ template <typename V>
 class iterator_base;
 }
 
-typedef detail::iterator_base<detail::iterator_value> iterator;
-typedef detail::iterator_base<const detail::iterator_value> const_iterator;
+using iterator = detail::iterator_base<detail::iterator_value>;
+using const_iterator = detail::iterator_base<const detail::iterator_value>;
 }
 
 #endif  // VALUE_DETAIL_ITERATOR_FWD_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/yaml-cpp/node/detail/memory.h

@@ -7,8 +7,6 @@
 #pragma once
 #endif
 
-#include <boost/shared_ptr.hpp>
-#include <boost/smart_ptr/shared_ptr.hpp>
 #include <set>
 
 #include "yaml-cpp/dll.h"
@@ -24,11 +22,12 @@ namespace YAML {
 namespace detail {
 class YAML_CPP_API memory {
  public:
+  memory() : m_nodes{} {}
   node& create_node();
   void merge(const memory& rhs);
 
  private:
-  typedef std::set<shared_node> Nodes;
+  using Nodes = std::set<shared_node>;
   Nodes m_nodes;
 };
 
@@ -40,9 +39,9 @@ class YAML_CPP_API memory_holder {
   void merge(memory_holder& rhs);
 
  private:
-  boost::shared_ptr<memory> m_pMemory;
+  shared_memory m_pMemory;
 };
-}
-}
+}  // namespace detail
+}  // namespace YAML
 
 #endif  // VALUE_DETAIL_MEMORY_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/yaml-cpp/node/detail/node.h

@@ -7,24 +7,32 @@
 #pragma once
 #endif
 
-#include "yaml-cpp/emitterstyle.h"
 #include "yaml-cpp/dll.h"
-#include "yaml-cpp/node/type.h"
-#include "yaml-cpp/node/ptr.h"
+#include "yaml-cpp/emitterstyle.h"
 #include "yaml-cpp/node/detail/node_ref.h"
+#include "yaml-cpp/node/ptr.h"
+#include "yaml-cpp/node/type.h"
 #include <set>
-#include <boost/utility.hpp>
+#include <atomic>
 
 namespace YAML {
 namespace detail {
-class node : private boost::noncopyable {
+class node {
+ private:
+  struct less {
+    bool operator ()(const node* l, const node* r) const {return l->m_index < r->m_index;}
+  };
+
  public:
-  node() : m_pRef(new node_ref) {}
+  node() : m_pRef(new node_ref), m_dependencies{}, m_index{} {}
+  node(const node&) = delete;
+  node& operator=(const node&) = delete;
 
   bool is(const node& rhs) const { return m_pRef == rhs.m_pRef; }
   const node_ref* ref() const { return m_pRef.get(); }
 
   bool is_defined() const { return m_pRef->is_defined(); }
+  const Mark& mark() const { return m_pRef->mark(); }
   NodeType::value type() const { return m_pRef->type(); }
 
   const std::string& scalar() const { return m_pRef->scalar(); }
@@ -40,9 +48,8 @@ class node : private boost::noncopyable {
       return;
 
     m_pRef->mark_defined();
-    for (nodes::iterator it = m_dependencies.begin();
-         it != m_dependencies.end(); ++it)
-      (*it)->mark_defined();
+    for (node* dependency : m_dependencies)
+      dependency->mark_defined();
     m_dependencies.clear();
   }
 
@@ -64,6 +71,8 @@ class node : private boost::noncopyable {
     m_pRef->set_data(*rhs.m_pRef);
   }
 
+  void set_mark(const Mark& mark) { m_pRef->set_mark(mark); }
+
   void set_type(NodeType::value type) {
     if (type != NodeType::Undefined)
       mark_defined();
@@ -102,9 +111,10 @@ class node : private boost::noncopyable {
   node_iterator end() { return m_pRef->end(); }
 
   // sequence
-  void push_back(node& node, shared_memory_holder pMemory) {
-    m_pRef->push_back(node, pMemory);
-    node.add_dependency(*this);
+  void push_back(node& input, shared_memory_holder pMemory) {
+    m_pRef->push_back(input, pMemory);
+    input.add_dependency(*this);
+    m_index = m_amount.fetch_add(1);
   }
   void insert(node& key, node& value, shared_memory_holder pMemory) {
     m_pRef->insert(key, value, pMemory);
@@ -116,7 +126,7 @@ class node : private boost::noncopyable {
   template <typename Key>
   node* get(const Key& key, shared_memory_holder pMemory) const {
     // NOTE: this returns a non-const node so that the top-level Node can wrap
-    // it, and returns a pointer so that it can be NULL (if there is no such
+    // it, and returns a pointer so that it can be nullptr (if there is no such
     // key).
     return static_cast<const node_ref&>(*m_pRef).get(key, pMemory);
   }
@@ -133,7 +143,7 @@ class node : private boost::noncopyable {
 
   node* get(node& key, shared_memory_holder pMemory) const {
     // NOTE: this returns a non-const node so that the top-level Node can wrap
-    // it, and returns a pointer so that it can be NULL (if there is no such
+    // it, and returns a pointer so that it can be nullptr (if there is no such
     // key).
     return static_cast<const node_ref&>(*m_pRef).get(key, pMemory);
   }
@@ -156,10 +166,12 @@ class node : private boost::noncopyable {
 
  private:
   shared_node_ref m_pRef;
-  typedef std::set<node*> nodes;
+  using nodes = std::set<node*, less>;
   nodes m_dependencies;
+  size_t m_index;
+  static YAML_CPP_API std::atomic<size_t> m_amount;
 };
-}
-}
+}  // namespace detail
+}  // namespace YAML
 
 #endif  // NODE_DETAIL_NODE_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/yaml-cpp/node/detail/node_data.h

@@ -7,8 +7,6 @@
 #pragma once
 #endif
 
-#include <boost/noncopyable.hpp>
-#include <boost/utility.hpp>
 #include <list>
 #include <map>
 #include <string>
@@ -29,11 +27,14 @@ class node;
 
 namespace YAML {
 namespace detail {
-class YAML_CPP_API node_data : private boost::noncopyable {
+class YAML_CPP_API node_data {
  public:
   node_data();
+  node_data(const node_data&) = delete;
+  node_data& operator=(const node_data&) = delete;
 
   void mark_defined();
+  void set_mark(const Mark& mark);
   void set_type(NodeType::value type);
   void set_tag(const std::string& tag);
   void set_null();
@@ -41,6 +42,7 @@ class YAML_CPP_API node_data : private boost::noncopyable {
   void set_style(EmitterStyle::value style);
 
   bool is_defined() const { return m_isDefined; }
+  const Mark& mark() const { return m_mark; }
   NodeType::value type() const {
     return m_isDefined ? m_type : NodeType::Undefined;
   }
@@ -58,8 +60,8 @@ class YAML_CPP_API node_data : private boost::noncopyable {
   node_iterator end();
 
   // sequence
-  void push_back(node& node, shared_memory_holder pMemory);
-  void insert(node& key, node& value, shared_memory_holder pMemory);
+  void push_back(node& node, const shared_memory_holder& pMemory);
+  void insert(node& key, node& value, const shared_memory_holder& pMemory);
 
   // indexing
   template <typename Key>
@@ -69,9 +71,9 @@ class YAML_CPP_API node_data : private boost::noncopyable {
   template <typename Key>
   bool remove(const Key& key, shared_memory_holder pMemory);
 
-  node* get(node& key, shared_memory_holder pMemory) const;
-  node& get(node& key, shared_memory_holder pMemory);
-  bool remove(node& key, shared_memory_holder pMemory);
+  node* get(node& key, const shared_memory_holder& pMemory) const;
+  node& get(node& key, const shared_memory_holder& pMemory);
+  bool remove(node& key, const shared_memory_holder& pMemory);
 
   // map
   template <typename Key, typename Value>
@@ -79,7 +81,7 @@ class YAML_CPP_API node_data : private boost::noncopyable {
                     shared_memory_holder pMemory);
 
  public:
-  static std::string empty_scalar;
+  static const std::string& empty_scalar();
 
  private:
   void compute_seq_size() const;
@@ -89,14 +91,15 @@ class YAML_CPP_API node_data : private boost::noncopyable {
   void reset_map();
 
   void insert_map_pair(node& key, node& value);
-  void convert_to_map(shared_memory_holder pMemory);
-  void convert_sequence_to_map(shared_memory_holder pMemory);
+  void convert_to_map(const shared_memory_holder& pMemory);
+  void convert_sequence_to_map(const shared_memory_holder& pMemory);
 
   template <typename T>
   static node& convert_to_node(const T& rhs, shared_memory_holder pMemory);
 
  private:
   bool m_isDefined;
+  Mark m_mark;
   NodeType::value m_type;
   std::string m_tag;
   EmitterStyle::value m_style;
@@ -105,17 +108,17 @@ class YAML_CPP_API node_data : private boost::noncopyable {
   std::string m_scalar;
 
   // sequence
-  typedef std::vector<node*> node_seq;
+  using node_seq = std::vector<node *>;
   node_seq m_sequence;
 
   mutable std::size_t m_seqSize;
 
   // map
-  typedef std::map<node*, node*> node_map;
+  using node_map = std::vector<std::pair<node*, node*>>;
   node_map m_map;
 
-  typedef std::pair<node*, node*> kv_pair;
-  typedef std::list<kv_pair> kv_pairs;
+  using kv_pair = std::pair<node*, node*>;
+  using kv_pairs = std::list<kv_pair>;
   mutable kv_pairs m_undefinedPairs;
 };
 }

include/yaml-cpp/node/detail/node_iterator.h

@@ -9,8 +9,9 @@
 
 #include "yaml-cpp/dll.h"
 #include "yaml-cpp/node/ptr.h"
-#include <boost/iterator/iterator_facade.hpp>
-#include <boost/utility/enable_if.hpp>
+#include <cstddef>
+#include <iterator>
+#include <memory>
 #include <map>
 #include <utility>
 #include <vector>
@@ -18,16 +19,16 @@
 namespace YAML {
 namespace detail {
 struct iterator_type {
-  enum value { None, Sequence, Map };
+  enum value { NoneType, Sequence, Map };
 };
 
 template <typename V>
 struct node_iterator_value : public std::pair<V*, V*> {
-  typedef std::pair<V*, V*> kv;
+  using kv = std::pair<V*, V*>;
 
-  node_iterator_value() : kv(), pNode(0) {}
+  node_iterator_value() : kv(), pNode(nullptr) {}
   explicit node_iterator_value(V& rhs) : kv(), pNode(&rhs) {}
-  explicit node_iterator_value(V& key, V& value) : kv(&key, &value), pNode(0) {}
+  explicit node_iterator_value(V& key, V& value) : kv(&key, &value), pNode(nullptr) {}
 
   V& operator*() const { return *pNode; }
   V& operator->() const { return *pNode; }
@@ -35,36 +36,45 @@ struct node_iterator_value : public std::pair<V*, V*> {
   V* pNode;
 };
 
-typedef std::vector<node*> node_seq;
-typedef std::map<node*, node*> node_map;
+using node_seq = std::vector<node *>;
+using node_map = std::vector<std::pair<node*, node*>>;
 
 template <typename V>
 struct node_iterator_type {
-  typedef node_seq::iterator seq;
-  typedef node_map::iterator map;
+  using seq = node_seq::iterator;
+  using map = node_map::iterator;
 };
 
 template <typename V>
 struct node_iterator_type<const V> {
-  typedef node_seq::const_iterator seq;
-  typedef node_map::const_iterator map;
+  using seq = node_seq::const_iterator;
+  using map = node_map::const_iterator;
 };
 
 template <typename V>
-class node_iterator_base
-    : public boost::iterator_facade<
-          node_iterator_base<V>, node_iterator_value<V>,
-          std::forward_iterator_tag, node_iterator_value<V> > {
+class node_iterator_base {
  private:
   struct enabler {};
 
+  struct proxy {
+    explicit proxy(const node_iterator_value<V>& x) : m_ref(x) {}
+    node_iterator_value<V>* operator->() { return std::addressof(m_ref); }
+    operator node_iterator_value<V>*() { return std::addressof(m_ref); }
+
+    node_iterator_value<V> m_ref;
+  };
+
  public:
-  typedef typename node_iterator_type<V>::seq SeqIter;
-  typedef typename node_iterator_type<V>::map MapIter;
-  typedef node_iterator_value<V> value_type;
+  using iterator_category = std::forward_iterator_tag;
+  using value_type = node_iterator_value<V>;
+  using difference_type = std::ptrdiff_t;
+  using pointer = node_iterator_value<V>*;
+  using reference = node_iterator_value<V>;
+  using SeqIter = typename node_iterator_type<V>::seq;
+  using MapIter = typename node_iterator_type<V>::map;
 
   node_iterator_base()
-      : m_type(iterator_type::None), m_seqIt(), m_mapIt(), m_mapEnd() {}
+      : m_type(iterator_type::NoneType), m_seqIt(), m_mapIt(), m_mapEnd() {}
   explicit node_iterator_base(SeqIter seqIt)
       : m_type(iterator_type::Sequence),
         m_seqIt(seqIt),
@@ -80,25 +90,23 @@ class node_iterator_base
 
   template <typename W>
   node_iterator_base(const node_iterator_base<W>& rhs,
-                     typename boost::enable_if<boost::is_convertible<W*, V*>,
-                                               enabler>::type = enabler())
+                     typename std::enable_if<std::is_convertible<W*, V*>::value,
+                                             enabler>::type = enabler())
       : m_type(rhs.m_type),
         m_seqIt(rhs.m_seqIt),
         m_mapIt(rhs.m_mapIt),
         m_mapEnd(rhs.m_mapEnd) {}
 
- private:
-  friend class boost::iterator_core_access;
   template <typename>
   friend class node_iterator_base;
 
   template <typename W>
-  bool equal(const node_iterator_base<W>& rhs) const {
+  bool operator==(const node_iterator_base<W>& rhs) const {
     if (m_type != rhs.m_type)
       return false;
 
     switch (m_type) {
-      case iterator_type::None:
+      case iterator_type::NoneType:
         return true;
       case iterator_type::Sequence:
         return m_seqIt == rhs.m_seqIt;
@@ -108,9 +116,14 @@ class node_iterator_base
     return true;
   }
 
-  void increment() {
+  template <typename W>
+  bool operator!=(const node_iterator_base<W>& rhs) const {
+    return !(*this == rhs);
+  }
+
+  node_iterator_base<V>& operator++() {
     switch (m_type) {
-      case iterator_type::None:
+      case iterator_type::NoneType:
         break;
       case iterator_type::Sequence:
         ++m_seqIt;
@@ -120,11 +133,18 @@ class node_iterator_base
         m_mapIt = increment_until_defined(m_mapIt);
         break;
     }
+    return *this;
   }
 
-  value_type dereference() const {
+  node_iterator_base<V> operator++(int) {
+    node_iterator_base<V> iterator_pre(*this);
+    ++(*this);
+    return iterator_pre;
+  }
+
+  value_type operator*() const {
     switch (m_type) {
-      case iterator_type::None:
+      case iterator_type::NoneType:
         return value_type();
       case iterator_type::Sequence:
         return value_type(**m_seqIt);
@@ -134,6 +154,8 @@ class node_iterator_base
     return value_type();
   }
 
+  proxy operator->() const { return proxy(**this); }
+
   MapIter increment_until_defined(MapIter it) {
     while (it != m_mapEnd && !is_defined(it))
       ++it;
@@ -151,8 +173,8 @@ class node_iterator_base
   MapIter m_mapIt, m_mapEnd;
 };
 
-typedef node_iterator_base<node> node_iterator;
-typedef node_iterator_base<const node> const_node_iterator;
+using node_iterator = node_iterator_base<node>;
+using const_node_iterator = node_iterator_base<const node>;
 }
 }
 

include/yaml-cpp/node/detail/node_ref.h

@@ -11,15 +11,17 @@
 #include "yaml-cpp/node/type.h"
 #include "yaml-cpp/node/ptr.h"
 #include "yaml-cpp/node/detail/node_data.h"
-#include <boost/utility.hpp>
 
 namespace YAML {
 namespace detail {
-class node_ref : private boost::noncopyable {
+class node_ref {
  public:
   node_ref() : m_pData(new node_data) {}
+  node_ref(const node_ref&) = delete;
+  node_ref& operator=(const node_ref&) = delete;
 
   bool is_defined() const { return m_pData->is_defined(); }
+  const Mark& mark() const { return m_pData->mark(); }
   NodeType::value type() const { return m_pData->type(); }
   const std::string& scalar() const { return m_pData->scalar(); }
   const std::string& tag() const { return m_pData->tag(); }
@@ -28,6 +30,7 @@ class node_ref : private boost::noncopyable {
   void mark_defined() { m_pData->mark_defined(); }
   void set_data(const node_ref& rhs) { m_pData = rhs.m_pData; }
 
+  void set_mark(const Mark& mark) { m_pData->set_mark(mark); }
   void set_type(NodeType::value type) { m_pData->set_type(type); }
   void set_tag(const std::string& tag) { m_pData->set_tag(tag); }
   void set_null() { m_pData->set_null(); }

include/yaml-cpp/node/emit.h

@@ -16,10 +16,17 @@ namespace YAML {
 class Emitter;
 class Node;
 
+/**
+ * Emits the node to the given {@link Emitter}. If there is an error in writing,
+ * {@link Emitter#good} will return false.
+ */
 YAML_CPP_API Emitter& operator<<(Emitter& out, const Node& node);
+
+/** Emits the node to the given output stream. */
 YAML_CPP_API std::ostream& operator<<(std::ostream& out, const Node& node);
 
+/** Converts the node to a YAML string. */
 YAML_CPP_API std::string Dump(const Node& node);
-}
+}  // namespace YAML
 
 #endif  // NODE_EMIT_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/yaml-cpp/node/impl.h

@@ -7,18 +7,21 @@
 #pragma once
 #endif
 
-#include "yaml-cpp/node/node.h"
-#include "yaml-cpp/node/iterator.h"
+#include "yaml-cpp/exceptions.h"
 #include "yaml-cpp/node/detail/memory.h"
 #include "yaml-cpp/node/detail/node.h"
-#include "yaml-cpp/exceptions.h"
+#include "yaml-cpp/node/iterator.h"
+#include "yaml-cpp/node/node.h"
+#include <sstream>
 #include <string>
 
 namespace YAML {
-inline Node::Node() : m_isValid(true), m_pNode(NULL) {}
+inline Node::Node()
+    : m_isValid(true), m_invalidKey{}, m_pMemory(nullptr), m_pNode(nullptr) {}
 
 inline Node::Node(NodeType::value type)
     : m_isValid(true),
+      m_invalidKey{},
       m_pMemory(new detail::memory_holder),
       m_pNode(&m_pMemory->create_node()) {
   m_pNode->set_type(type);
@@ -27,6 +30,7 @@ inline Node::Node(NodeType::value type)
 template <typename T>
 inline Node::Node(const T& rhs)
     : m_isValid(true),
+      m_invalidKey{},
       m_pMemory(new detail::memory_holder),
       m_pNode(&m_pMemory->create_node()) {
   Assign(rhs);
@@ -34,24 +38,26 @@ inline Node::Node(const T& rhs)
 
 inline Node::Node(const detail::iterator_value& rhs)
     : m_isValid(rhs.m_isValid),
+      m_invalidKey(rhs.m_invalidKey),
       m_pMemory(rhs.m_pMemory),
       m_pNode(rhs.m_pNode) {}
 
-inline Node::Node(const Node& rhs)
-    : m_isValid(rhs.m_isValid),
-      m_pMemory(rhs.m_pMemory),
-      m_pNode(rhs.m_pNode) {}
+inline Node::Node(const Node&) = default;
 
-inline Node::Node(Zombie) : m_isValid(false), m_pNode(NULL) {}
+inline Node::Node(Zombie)
+    : m_isValid(false), m_invalidKey{}, m_pMemory{}, m_pNode(nullptr) {}
+
+inline Node::Node(Zombie, const std::string& key)
+    : m_isValid(false), m_invalidKey(key), m_pMemory{}, m_pNode(nullptr) {}
 
 inline Node::Node(detail::node& node, detail::shared_memory_holder pMemory)
-    : m_isValid(true), m_pMemory(pMemory), m_pNode(&node) {}
+    : m_isValid(true), m_invalidKey{}, m_pMemory(pMemory), m_pNode(&node) {}
 
-inline Node::~Node() {}
+inline Node::~Node() = default;
 
 inline void Node::EnsureNodeExists() const {
   if (!m_isValid)
-    throw InvalidNode();
+    throw InvalidNode(m_invalidKey);
   if (!m_pNode) {
     m_pMemory.reset(new detail::memory_holder);
     m_pNode = &m_pMemory->create_node();
@@ -66,9 +72,16 @@ inline bool Node::IsDefined() const {
   return m_pNode ? m_pNode->is_defined() : true;
 }
 
+inline Mark Node::Mark() const {
+  if (!m_isValid) {
+    throw InvalidNode(m_invalidKey);
+  }
+  return m_pNode ? m_pNode->mark() : Mark::null_mark();
+}
+
 inline NodeType::value Node::Type() const {
   if (!m_isValid)
-    throw InvalidNode();
+    throw InvalidNode(m_invalidKey);
   return m_pNode ? m_pNode->type() : NodeType::Null;
 }
 
@@ -80,7 +93,7 @@ struct as_if {
   explicit as_if(const Node& node_) : node(node_) {}
   const Node& node;
 
-  const T operator()(const S& fallback) const {
+  T operator()(const S& fallback) const {
     if (!node.m_pNode)
       return fallback;
 
@@ -96,7 +109,9 @@ struct as_if<std::string, S> {
   explicit as_if(const Node& node_) : node(node_) {}
   const Node& node;
 
-  const std::string operator()(const S& fallback) const {
+  std::string operator()(const S& fallback) const {
+    if (node.Type() == NodeType::Null)
+      return "null";
     if (node.Type() != NodeType::Scalar)
       return fallback;
     return node.Scalar();
@@ -108,14 +123,14 @@ struct as_if<T, void> {
   explicit as_if(const Node& node_) : node(node_) {}
   const Node& node;
 
-  const T operator()() const {
+  T operator()() const {
     if (!node.m_pNode)
-      throw TypedBadConversion<T>();
+      throw TypedBadConversion<T>(node.Mark());
 
     T t;
     if (convert<T>::decode(node, t))
       return t;
-    throw TypedBadConversion<T>();
+    throw TypedBadConversion<T>(node.Mark());
   }
 };
 
@@ -124,56 +139,54 @@ struct as_if<std::string, void> {
   explicit as_if(const Node& node_) : node(node_) {}
   const Node& node;
 
-  const std::string operator()() const {
+  std::string operator()() const {
+    if (node.Type() == NodeType::Null)
+      return "null";
     if (node.Type() != NodeType::Scalar)
-      throw TypedBadConversion<std::string>();
+      throw TypedBadConversion<std::string>(node.Mark());
     return node.Scalar();
   }
 };
 
 // access functions
 template <typename T>
-inline const T Node::as() const {
+inline T Node::as() const {
   if (!m_isValid)
-    throw InvalidNode();
+    throw InvalidNode(m_invalidKey);
   return as_if<T, void>(*this)();
 }
 
 template <typename T, typename S>
-inline const T Node::as(const S& fallback) const {
+inline T Node::as(const S& fallback) const {
   if (!m_isValid)
-    throw InvalidNode();
+    return fallback;
   return as_if<T, S>(*this)(fallback);
 }
 
 inline const std::string& Node::Scalar() const {
   if (!m_isValid)
-    throw InvalidNode();
-  return m_pNode ? m_pNode->scalar() : detail::node_data::empty_scalar;
+    throw InvalidNode(m_invalidKey);
+  return m_pNode ? m_pNode->scalar() : detail::node_data::empty_scalar();
 }
 
 inline const std::string& Node::Tag() const {
   if (!m_isValid)
-    throw InvalidNode();
-  return m_pNode ? m_pNode->tag() : detail::node_data::empty_scalar;
+    throw InvalidNode(m_invalidKey);
+  return m_pNode ? m_pNode->tag() : detail::node_data::empty_scalar();
 }
 
 inline void Node::SetTag(const std::string& tag) {
-  if (!m_isValid)
-    throw InvalidNode();
   EnsureNodeExists();
   m_pNode->set_tag(tag);
 }
 
 inline EmitterStyle::value Node::Style() const {
   if (!m_isValid)
-    throw InvalidNode();
+    throw InvalidNode(m_invalidKey);
   return m_pNode ? m_pNode->style() : EmitterStyle::Default;
 }
 
 inline void Node::SetStyle(EmitterStyle::value style) {
-  if (!m_isValid)
-    throw InvalidNode();
   EnsureNodeExists();
   m_pNode->set_style(style);
 }
@@ -181,7 +194,7 @@ inline void Node::SetStyle(EmitterStyle::value style) {
 // assignment
 inline bool Node::is(const Node& rhs) const {
   if (!m_isValid || !rhs.m_isValid)
-    throw InvalidNode();
+    throw InvalidNode(m_invalidKey);
   if (!m_pNode || !rhs.m_pNode)
     return false;
   return m_pNode->is(*rhs.m_pNode);
@@ -189,15 +202,20 @@ inline bool Node::is(const Node& rhs) const {
 
 template <typename T>
 inline Node& Node::operator=(const T& rhs) {
-  if (!m_isValid)
-    throw InvalidNode();
   Assign(rhs);
   return *this;
 }
 
+inline Node& Node::operator=(const Node& rhs) {
+  if (is(rhs))
+    return *this;
+  AssignNode(rhs);
+  return *this;
+}
+
 inline void Node::reset(const YAML::Node& rhs) {
   if (!m_isValid || !rhs.m_isValid)
-    throw InvalidNode();
+    throw InvalidNode(m_invalidKey);
   m_pMemory = rhs.m_pMemory;
   m_pNode = rhs.m_pNode;
 }
@@ -205,44 +223,27 @@ inline void Node::reset(const YAML::Node& rhs) {
 template <typename T>
 inline void Node::Assign(const T& rhs) {
   if (!m_isValid)
-    throw InvalidNode();
+    throw InvalidNode(m_invalidKey);
   AssignData(convert<T>::encode(rhs));
 }
 
 template <>
 inline void Node::Assign(const std::string& rhs) {
-  if (!m_isValid)
-    throw InvalidNode();
   EnsureNodeExists();
   m_pNode->set_scalar(rhs);
 }
 
 inline void Node::Assign(const char* rhs) {
-  if (!m_isValid)
-    throw InvalidNode();
   EnsureNodeExists();
   m_pNode->set_scalar(rhs);
 }
 
 inline void Node::Assign(char* rhs) {
-  if (!m_isValid)
-    throw InvalidNode();
   EnsureNodeExists();
   m_pNode->set_scalar(rhs);
 }
 
-inline Node& Node::operator=(const Node& rhs) {
-  if (!m_isValid || !rhs.m_isValid)
-    throw InvalidNode();
-  if (is(rhs))
-    return *this;
-  AssignNode(rhs);
-  return *this;
-}
-
 inline void Node::AssignData(const Node& rhs) {
-  if (!m_isValid || !rhs.m_isValid)
-    throw InvalidNode();
   EnsureNodeExists();
   rhs.EnsureNodeExists();
 
@@ -251,8 +252,8 @@ inline void Node::AssignData(const Node& rhs) {
 }
 
 inline void Node::AssignNode(const Node& rhs) {
-  if (!m_isValid || !rhs.m_isValid)
-    throw InvalidNode();
+  if (!m_isValid)
+    throw InvalidNode(m_invalidKey);
   rhs.EnsureNodeExists();
 
   if (!m_pNode) {
@@ -269,32 +270,32 @@ inline void Node::AssignNode(const Node& rhs) {
 // size/iterator
 inline std::size_t Node::size() const {
   if (!m_isValid)
-    throw InvalidNode();
+    throw InvalidNode(m_invalidKey);
   return m_pNode ? m_pNode->size() : 0;
 }
 
 inline const_iterator Node::begin() const {
   if (!m_isValid)
-    throw InvalidNode();
+    return const_iterator();
   return m_pNode ? const_iterator(m_pNode->begin(), m_pMemory)
                  : const_iterator();
 }
 
 inline iterator Node::begin() {
   if (!m_isValid)
-    throw InvalidNode();
+    return iterator();
   return m_pNode ? iterator(m_pNode->begin(), m_pMemory) : iterator();
 }
 
 inline const_iterator Node::end() const {
   if (!m_isValid)
-    throw InvalidNode();
+    return const_iterator();
   return m_pNode ? const_iterator(m_pNode->end(), m_pMemory) : const_iterator();
 }
 
 inline iterator Node::end() {
   if (!m_isValid)
-    throw InvalidNode();
+    return iterator();
   return m_pNode ? iterator(m_pNode->end(), m_pMemory) : iterator();
 }
 
@@ -302,13 +303,11 @@ inline iterator Node::end() {
 template <typename T>
 inline void Node::push_back(const T& rhs) {
   if (!m_isValid)
-    throw InvalidNode();
+    throw InvalidNode(m_invalidKey);
   push_back(Node(rhs));
 }
 
 inline void Node::push_back(const Node& rhs) {
-  if (!m_isValid || !rhs.m_isValid)
-    throw InvalidNode();
   EnsureNodeExists();
   rhs.EnsureNodeExists();
 
@@ -316,99 +315,49 @@ inline void Node::push_back(const Node& rhs) {
   m_pMemory->merge(*rhs.m_pMemory);
 }
 
-// helpers for indexing
-namespace detail {
-template <typename T>
-struct to_value_t {
-  explicit to_value_t(const T& t_) : t(t_) {}
-  const T& t;
-  typedef const T& return_type;
-
-  const T& operator()() const { return t; }
-};
-
-template <>
-struct to_value_t<const char*> {
-  explicit to_value_t(const char* t_) : t(t_) {}
-  const char* t;
-  typedef std::string return_type;
-
-  const std::string operator()() const { return t; }
-};
-
-template <>
-struct to_value_t<char*> {
-  explicit to_value_t(char* t_) : t(t_) {}
-  const char* t;
-  typedef std::string return_type;
-
-  const std::string operator()() const { return t; }
-};
-
-template <std::size_t N>
-struct to_value_t<char[N]> {
-  explicit to_value_t(const char* t_) : t(t_) {}
-  const char* t;
-  typedef std::string return_type;
-
-  const std::string operator()() const { return t; }
-};
-
-// converts C-strings to std::strings so they can be copied
-template <typename T>
-inline typename to_value_t<T>::return_type to_value(const T& t) {
-  return to_value_t<T>(t)();
-}
+template<typename Key>
+std::string key_to_string(const Key& key) {
+  return streamable_to_string<Key, is_streamable<std::stringstream, Key>::value>().impl(key);
 }
 
 // indexing
 template <typename Key>
 inline const Node Node::operator[](const Key& key) const {
-  if (!m_isValid)
-    throw InvalidNode();
   EnsureNodeExists();
-  detail::node* value = static_cast<const detail::node&>(*m_pNode)
-                            .get(detail::to_value(key), m_pMemory);
+  detail::node* value =
+      static_cast<const detail::node&>(*m_pNode).get(key, m_pMemory);
   if (!value) {
-    return Node(ZombieNode);
+    return Node(ZombieNode, key_to_string(key));
   }
   return Node(*value, m_pMemory);
 }
 
 template <typename Key>
 inline Node Node::operator[](const Key& key) {
-  if (!m_isValid)
-    throw InvalidNode();
   EnsureNodeExists();
-  detail::node& value = m_pNode->get(detail::to_value(key), m_pMemory);
+  detail::node& value = m_pNode->get(key, m_pMemory);
   return Node(value, m_pMemory);
 }
 
 template <typename Key>
 inline bool Node::remove(const Key& key) {
-  if (!m_isValid)
-    throw InvalidNode();
   EnsureNodeExists();
-  return m_pNode->remove(detail::to_value(key), m_pMemory);
+  return m_pNode->remove(key, m_pMemory);
 }
 
 inline const Node Node::operator[](const Node& key) const {
-  if (!m_isValid || !key.m_isValid)
-    throw InvalidNode();
   EnsureNodeExists();
   key.EnsureNodeExists();
   m_pMemory->merge(*key.m_pMemory);
   detail::node* value =
       static_cast<const detail::node&>(*m_pNode).get(*key.m_pNode, m_pMemory);
   if (!value) {
-    return Node(ZombieNode);
+    return Node(ZombieNode, key_to_string(key));
   }
   return Node(*value, m_pMemory);
 }
 
 inline Node Node::operator[](const Node& key) {
-  if (!m_isValid || !key.m_isValid)
-    throw InvalidNode();
   EnsureNodeExists();
   key.EnsureNodeExists();
   m_pMemory->merge(*key.m_pMemory);
@@ -417,8 +366,6 @@ inline Node Node::operator[](const Node& key) {
 }
 
 inline bool Node::remove(const Node& key) {
-  if (!m_isValid || !key.m_isValid)
-    throw InvalidNode();
   EnsureNodeExists();
   key.EnsureNodeExists();
   return m_pNode->remove(*key.m_pNode, m_pMemory);
@@ -427,15 +374,12 @@ inline bool Node::remove(const Node& key) {
 // map
 template <typename Key, typename Value>
 inline void Node::force_insert(const Key& key, const Value& value) {
-  if (!m_isValid)
-    throw InvalidNode();
   EnsureNodeExists();
-  m_pNode->force_insert(detail::to_value(key), detail::to_value(value),
-                        m_pMemory);
+  m_pNode->force_insert(key, value, m_pMemory);
 }
 
 // free functions
 inline bool operator==(const Node& lhs, const Node& rhs) { return lhs.is(rhs); }
-}
+}  // namespace YAML
 
 #endif  // NODE_IMPL_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/yaml-cpp/node/iterator.h

@@ -15,10 +15,13 @@
 #include <utility>
 #include <vector>
 
+// Assert in place so gcc + libc++ combination properly builds
+static_assert(std::is_constructible<YAML::Node, const YAML::Node&>::value, "Node must be copy constructable");
+
 namespace YAML {
 namespace detail {
 struct iterator_value : public Node, std::pair<Node, Node> {
-  iterator_value() {}
+  iterator_value() = default;
   explicit iterator_value(const Node& rhs)
       : Node(rhs),
         std::pair<Node, Node>(Node(Node::ZombieNode), Node(Node::ZombieNode)) {}

include/yaml-cpp/node/node.h

@@ -8,10 +8,11 @@
 #endif
 
 #include <stdexcept>
+#include <string>
 
 #include "yaml-cpp/dll.h"
 #include "yaml-cpp/emitterstyle.h"
-#include "yaml-cpp/node/detail/bool_type.h"
+#include "yaml-cpp/mark.h"
 #include "yaml-cpp/node/detail/iterator_fwd.h"
 #include "yaml-cpp/node/ptr.h"
 #include "yaml-cpp/node/type.h"
@@ -37,8 +38,8 @@ class YAML_CPP_API Node {
   template <typename T, typename S>
   friend struct as_if;
 
-  typedef YAML::iterator iterator;
-  typedef YAML::const_iterator const_iterator;
+  using iterator = YAML::iterator;
+  using const_iterator = YAML::const_iterator;
 
   Node();
   explicit Node(NodeType::value type);
@@ -48,6 +49,7 @@ class YAML_CPP_API Node {
   Node(const Node& rhs);
   ~Node();
 
+  YAML::Mark Mark() const;
   NodeType::value Type() const;
   bool IsDefined() const;
   bool IsNull() const { return Type() == NodeType::Null; }
@@ -56,14 +58,14 @@ class YAML_CPP_API Node {
   bool IsMap() const { return Type() == NodeType::Map; }
 
   // bool conversions
-  YAML_CPP_OPERATOR_BOOL();
+  explicit operator bool() const { return IsDefined(); }
   bool operator!() const { return !IsDefined(); }
 
   // access
   template <typename T>
-  const T as() const;
+  T as() const;
   template <typename T, typename S>
-  const T as(const S& fallback) const;
+  T as(const S& fallback) const;
   const std::string& Scalar() const;
 
   const std::string& Tag() const;
@@ -114,6 +116,7 @@ class YAML_CPP_API Node {
  private:
   enum Zombie { ZombieNode };
   explicit Node(Zombie);
+  explicit Node(Zombie, const std::string&);
   explicit Node(detail::node& node, detail::shared_memory_holder pMemory);
 
   void EnsureNodeExists() const;
@@ -128,6 +131,8 @@ class YAML_CPP_API Node {
 
  private:
   bool m_isValid;
+  // String representation of invalid key, if the node is invalid.
+  std::string m_invalidKey;
   mutable detail::shared_memory_holder m_pMemory;
   mutable detail::node* m_pNode;
 };

include/yaml-cpp/node/parse.h

@@ -16,15 +16,63 @@
 namespace YAML {
 class Node;
 
+/**
+ * Loads the input string as a single YAML document.
+ *
+ * @throws {@link ParserException} if it is malformed.
+ */
 YAML_CPP_API Node Load(const std::string& input);
+
+/**
+ * Loads the input string as a single YAML document.
+ *
+ * @throws {@link ParserException} if it is malformed.
+ */
 YAML_CPP_API Node Load(const char* input);
+
+/**
+ * Loads the input stream as a single YAML document.
+ *
+ * @throws {@link ParserException} if it is malformed.
+ */
 YAML_CPP_API Node Load(std::istream& input);
+
+/**
+ * Loads the input file as a single YAML document.
+ *
+ * @throws {@link ParserException} if it is malformed.
+ * @throws {@link BadFile} if the file cannot be loaded.
+ */
 YAML_CPP_API Node LoadFile(const std::string& filename);
 
+/**
+ * Loads the input string as a list of YAML documents.
+ *
+ * @throws {@link ParserException} if it is malformed.
+ */
 YAML_CPP_API std::vector<Node> LoadAll(const std::string& input);
+
+/**
+ * Loads the input string as a list of YAML documents.
+ *
+ * @throws {@link ParserException} if it is malformed.
+ */
 YAML_CPP_API std::vector<Node> LoadAll(const char* input);
+
+/**
+ * Loads the input stream as a list of YAML documents.
+ *
+ * @throws {@link ParserException} if it is malformed.
+ */
 YAML_CPP_API std::vector<Node> LoadAll(std::istream& input);
+
+/**
+ * Loads the input file as a list of YAML documents.
+ *
+ * @throws {@link ParserException} if it is malformed.
+ * @throws {@link BadFile} if the file cannot be loaded.
+ */
 YAML_CPP_API std::vector<Node> LoadAllFromFile(const std::string& filename);
-}
+}  // namespace YAML
 
 #endif  // VALUE_PARSE_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/yaml-cpp/node/ptr.h

@@ -8,7 +8,7 @@
 #endif
 
 #include "yaml-cpp/dll.h"
-#include <boost/shared_ptr.hpp>
+#include <memory>
 
 namespace YAML {
 namespace detail {
@@ -18,11 +18,11 @@ class node_data;
 class memory;
 class memory_holder;
 
-typedef boost::shared_ptr<node> shared_node;
-typedef boost::shared_ptr<node_ref> shared_node_ref;
-typedef boost::shared_ptr<node_data> shared_node_data;
-typedef boost::shared_ptr<memory_holder> shared_memory_holder;
-typedef boost::shared_ptr<memory> shared_memory;
+using shared_node = std::shared_ptr<node>;
+using shared_node_ref = std::shared_ptr<node_ref>;
+using shared_node_data = std::shared_ptr<node_data>;
+using shared_memory_holder = std::shared_ptr<memory_holder>;
+using shared_memory = std::shared_ptr<memory>;
 }
 }
 

include/yaml-cpp/noexcept.h

@@ -0,0 +1,18 @@
+#ifndef NOEXCEPT_H_768872DA_476C_11EA_88B8_90B11C0C0FF8
+#define NOEXCEPT_H_768872DA_476C_11EA_88B8_90B11C0C0FF8
+
+#if defined(_MSC_VER) ||                                            \
+    (defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || \
+     (__GNUC__ >= 4))  // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
+// This is here for compatibility with older versions of Visual Studio
+// which don't support noexcept.
+#if defined(_MSC_VER) && _MSC_VER < 1900
+    #define YAML_CPP_NOEXCEPT _NOEXCEPT
+#else
+    #define YAML_CPP_NOEXCEPT noexcept
+#endif
+
+#endif

include/yaml-cpp/noncopyable.h

@@ -1,25 +0,0 @@
-#ifndef NONCOPYABLE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
-#define NONCOPYABLE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
-
-#if defined(_MSC_VER) ||                                            \
-    (defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || \
-     (__GNUC__ >= 4))  // GCC supports "pragma once" correctly since 3.4
-#pragma once
-#endif
-
-#include "yaml-cpp/dll.h"
-
-namespace YAML {
-// this is basically boost::noncopyable
-class YAML_CPP_API noncopyable {
- protected:
-  noncopyable() {}
-  ~noncopyable() {}
-
- private:
-  noncopyable(const noncopyable&);
-  const noncopyable& operator=(const noncopyable&);
-};
-}
-
-#endif  // NONCOPYABLE_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/yaml-cpp/null.h

@@ -8,6 +8,7 @@
 #endif
 
 #include "yaml-cpp/dll.h"
+#include <string>
 
 namespace YAML {
 class Node;
@@ -17,6 +18,7 @@ inline bool operator==(const _Null&, const _Null&) { return true; }
 inline bool operator!=(const _Null&, const _Null&) { return false; }
 
 YAML_CPP_API bool IsNull(const Node& node);  // old API only
+YAML_CPP_API bool IsNullString(const std::string& str);
 
 extern YAML_CPP_API _Null Null;
 }

include/yaml-cpp/ostream_wrapper.h

@@ -17,6 +17,10 @@ class YAML_CPP_API ostream_wrapper {
  public:
   ostream_wrapper();
   explicit ostream_wrapper(std::ostream& stream);
+  ostream_wrapper(const ostream_wrapper&) = delete;
+  ostream_wrapper(ostream_wrapper&&) = delete;
+  ostream_wrapper& operator=(const ostream_wrapper&) = delete;
+  ostream_wrapper& operator=(ostream_wrapper&&) = delete;
   ~ostream_wrapper();
 
   void write(const std::string& str);
@@ -26,7 +30,7 @@ class YAML_CPP_API ostream_wrapper {
 
   const char* str() const {
     if (m_pStream) {
-      return 0;
+      return nullptr;
     } else {
       m_buffer[m_pos] = '\0';
       return &m_buffer[0];
@@ -52,7 +56,7 @@ class YAML_CPP_API ostream_wrapper {
 
 template <std::size_t N>
 inline ostream_wrapper& operator<<(ostream_wrapper& stream,
-                                   const char(&str)[N]) {
+                                   const char (&str)[N]) {
   stream.write(str, N - 1);
   return stream;
 }
@@ -67,6 +71,6 @@ inline ostream_wrapper& operator<<(ostream_wrapper& stream, char ch) {
   stream.write(&ch, 1);
   return stream;
 }
-}
+}  // namespace YAML
 
 #endif  // OSTREAM_WRAPPER_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/yaml-cpp/parser.h

@@ -11,7 +11,6 @@
 #include <memory>
 
 #include "yaml-cpp/dll.h"
-#include "yaml-cpp/noncopyable.h"
 
 namespace YAML {
 class EventHandler;
@@ -20,29 +19,72 @@ class Scanner;
 struct Directives;
 struct Token;
 
-class YAML_CPP_API Parser : private noncopyable {
+/**
+ * A parser turns a stream of bytes into one stream of "events" per YAML
+ * document in the input stream.
+ */
+class YAML_CPP_API Parser {
  public:
+  /** Constructs an empty parser (with no input. */
   Parser();
-  Parser(std::istream& in);
+
+  Parser(const Parser&) = delete;
+  Parser(Parser&&) = delete;
+  Parser& operator=(const Parser&) = delete;
+  Parser& operator=(Parser&&) = delete;
+
+  /**
+   * Constructs a parser from the given input stream. The input stream must
+   * live as long as the parser.
+   */
+  explicit Parser(std::istream& in);
+
   ~Parser();
 
-  operator bool() const;
+  /** Evaluates to true if the parser has some valid input to be read. */
+  explicit operator bool() const;
 
+  /**
+   * Resets the parser with the given input stream. Any existing state is
+   * erased.
+   */
   void Load(std::istream& in);
+
+  /**
+   * Handles the next document by calling events on the {@code eventHandler}.
+   *
+   * @throw a ParserException on error.
+   * @return false if there are no more documents
+   */
   bool HandleNextDocument(EventHandler& eventHandler);
 
   void PrintTokens(std::ostream& out);
 
  private:
+  /**
+   * Reads any directives that are next in the queue, setting the internal
+   * {@code m_pDirectives} state.
+   */
   void ParseDirectives();
+
   void HandleDirective(const Token& token);
+
+  /**
+   * Handles a "YAML" directive, which should be of the form 'major.minor' (like
+   * a version number).
+   */
   void HandleYamlDirective(const Token& token);
+
+  /**
+   * Handles a "TAG" directive, which should be of the form 'handle prefix',
+   * where 'handle' is converted to 'prefix' in the file.
+   */
   void HandleTagDirective(const Token& token);
 
  private:
-  std::auto_ptr<Scanner> m_pScanner;
-  std::auto_ptr<Directives> m_pDirectives;
+  std::unique_ptr<Scanner> m_pScanner;
+  std::unique_ptr<Directives> m_pDirectives;
 };
-}
+}  // namespace YAML
 
 #endif  // PARSER_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/yaml-cpp/stlemitter.h

@@ -16,8 +16,8 @@ namespace YAML {
 template <typename Seq>
 inline Emitter& EmitSeq(Emitter& emitter, const Seq& seq) {
   emitter << BeginSeq;
-  for (typename Seq::const_iterator it = seq.begin(); it != seq.end(); ++it)
-    emitter << *it;
+  for (const auto& v : seq)
+    emitter << v;
   emitter << EndSeq;
   return emitter;
 }
@@ -39,10 +39,9 @@ inline Emitter& operator<<(Emitter& emitter, const std::set<T>& v) {
 
 template <typename K, typename V>
 inline Emitter& operator<<(Emitter& emitter, const std::map<K, V>& m) {
-  typedef typename std::map<K, V> map;
   emitter << BeginMap;
-  for (typename map::const_iterator it = m.begin(); it != m.end(); ++it)
-    emitter << Key << it->first << Value << it->second;
+  for (const auto& v : m)
+    emitter << Key << v.first << Value << v.second;
   emitter << EndMap;
   return emitter;
 }

include/yaml-cpp/traits.h

@@ -7,6 +7,11 @@
 #pragma once
 #endif
 
+#include <type_traits>
+#include <utility>
+#include <string>
+#include <sstream>
+
 namespace YAML {
 template <typename>
 struct is_numeric {
@@ -79,7 +84,7 @@ struct is_numeric<long double> {
 
 template <bool, class T = void>
 struct enable_if_c {
-  typedef T type;
+  using type = T;
 };
 
 template <class T>
@@ -90,7 +95,7 @@ struct enable_if : public enable_if_c<Cond::value, T> {};
 
 template <bool, class T = void>
 struct disable_if_c {
-  typedef T type;
+  using type = T;
 };
 
 template <class T>
@@ -100,4 +105,31 @@ template <class Cond, class T = void>
 struct disable_if : public disable_if_c<Cond::value, T> {};
 }
 
+template <typename S, typename T>
+struct is_streamable {
+  template <typename SS, typename TT>
+  static auto test(int)
+      -> decltype(std::declval<SS&>() << std::declval<TT>(), std::true_type());
+
+  template <typename, typename>
+  static auto test(...) -> std::false_type;
+
+  static const bool value = decltype(test<S, T>(0))::value;
+};
+
+template<typename Key, bool Streamable>
+struct streamable_to_string {
+  static std::string impl(const Key& key) {
+    std::stringstream ss;
+    ss << key;
+    return ss.str();
+  }
+};
+
+template<typename Key>
+struct streamable_to_string<Key, false> {
+  static std::string impl(const Key&) {
+    return "";
+  }
+};
 #endif  // TRAITS_H_62B23520_7C8E_11DE_8A39_0800200C9A66

src/binary.cpp

@@ -1,5 +1,7 @@
 #include "yaml-cpp/binary.h"
 
+#include <cctype>
+
 namespace YAML {
 static const char encoding[] =
     "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
@@ -64,7 +66,7 @@ static const unsigned char decoding[] = {
 };
 
 std::vector<unsigned char> DecodeBase64(const std::string &input) {
-  typedef std::vector<unsigned char> ret_type;
+  using ret_type = std::vector<unsigned char>;
   if (input.empty())
     return ret_type();
 
@@ -72,22 +74,27 @@ std::vector<unsigned char> DecodeBase64(const std::string &input) {
   unsigned char *out = &ret[0];
 
   unsigned value = 0;
-  for (std::size_t i = 0; i < input.size(); i++) {
-    unsigned char d = decoding[static_cast<unsigned>(input[i])];
+  for (std::size_t i = 0, cnt = 0; i < input.size(); i++) {
+    if (std::isspace(input[i])) {
+      // skip newlines
+      continue;
+    }
+    unsigned char d = decoding[static_cast<unsigned char>(input[i])];
     if (d == 255)
       return ret_type();
 
     value = (value << 6) | d;
-    if (i % 4 == 3) {
+    if (cnt % 4 == 3) {
       *out++ = value >> 16;
       if (i > 0 && input[i - 1] != '=')
         *out++ = value >> 8;
       if (input[i] != '=')
         *out++ = value;
     }
+    ++cnt;
   }
 
   ret.resize(out - &ret[0]);
   return ret;
 }
-}
+}  // namespace YAML

src/collectionstack.h

@@ -7,8 +7,8 @@
 #pragma once
 #endif
 
-#include <stack>
 #include <cassert>
+#include <stack>
 
 namespace YAML {
 struct CollectionType {
@@ -17,6 +17,7 @@ struct CollectionType {
 
 class CollectionStack {
  public:
+  CollectionStack() : collectionStack{} {}
   CollectionType::value GetCurCollectionType() const {
     if (collectionStack.empty())
       return CollectionType::NoCollection;
@@ -28,12 +29,13 @@ class CollectionStack {
   }
   void PopCollectionType(CollectionType::value type) {
     assert(type == GetCurCollectionType());
+    (void)type;
     collectionStack.pop();
   }
 
  private:
   std::stack<CollectionType::value> collectionStack;
 };
-}
+}  // namespace YAML
 
 #endif  // COLLECTIONSTACK_H_62B23520_7C8E_11DE_8A39_0800200C9A66

src/contrib/graphbuilder.cpp

@@ -10,8 +10,7 @@ void* BuildGraphOfNextDocument(Parser& parser,
   GraphBuilderAdapter eventHandler(graphBuilder);
   if (parser.HandleNextDocument(eventHandler)) {
     return eventHandler.RootNode();
-  } else {
-    return NULL;
   }
+  return nullptr;
 }
-}
+}  // namespace YAML

src/contrib/graphbuilderadapter.cpp

@@ -49,7 +49,7 @@ void GraphBuilderAdapter::OnMapStart(const Mark &mark, const std::string &tag,
                                      EmitterStyle::value /* style */) {
   void *pNode = m_builder.NewMap(mark, tag, GetCurrentParent());
   m_containers.push(ContainerFrame(pNode, m_pKeyNode));
-  m_pKeyNode = NULL;
+  m_pKeyNode = nullptr;
   RegisterAnchor(anchor, pNode);
 }
 
@@ -62,7 +62,7 @@ void GraphBuilderAdapter::OnMapEnd() {
 
 void *GraphBuilderAdapter::GetCurrentParent() const {
   if (m_containers.empty()) {
-    return NULL;
+    return nullptr;
   }
   return m_containers.top().pContainer;
 }
@@ -83,7 +83,7 @@ void GraphBuilderAdapter::DispositionNode(void *pNode) {
   if (m_containers.top().isMap()) {
     if (m_pKeyNode) {
       m_builder.AssignInMap(pContainer, m_pKeyNode, pNode);
-      m_pKeyNode = NULL;
+      m_pKeyNode = nullptr;
     } else {
       m_pKeyNode = pNode;
     }
@@ -91,4 +91,4 @@ void GraphBuilderAdapter::DispositionNode(void *pNode) {
     m_builder.AppendToSequence(pContainer, pNode);
   }
 }
-}
+}  // namespace YAML

src/contrib/graphbuilderadapter.h

@@ -26,7 +26,15 @@ namespace YAML {
 class GraphBuilderAdapter : public EventHandler {
  public:
   GraphBuilderAdapter(GraphBuilderInterface& builder)
-      : m_builder(builder), m_pRootNode(NULL), m_pKeyNode(NULL) {}
+      : m_builder(builder),
+        m_containers{},
+        m_anchors{},
+        m_pRootNode(nullptr),
+        m_pKeyNode(nullptr) {}
+  GraphBuilderAdapter(const GraphBuilderAdapter&) = delete;
+  GraphBuilderAdapter(GraphBuilderAdapter&&) = delete;
+  GraphBuilderAdapter& operator=(const GraphBuilderAdapter&) = delete;
+  GraphBuilderAdapter& operator=(GraphBuilderAdapter&&) = delete;
 
   virtual void OnDocumentStart(const Mark& mark) { (void)mark; }
   virtual void OnDocumentEnd() {}
@@ -50,8 +58,8 @@ class GraphBuilderAdapter : public EventHandler {
   struct ContainerFrame {
     ContainerFrame(void* pSequence)
         : pContainer(pSequence), pPrevKeyNode(&sequenceMarker) {}
-    ContainerFrame(void* pMap, void* pPrevKeyNode)
-        : pContainer(pMap), pPrevKeyNode(pPrevKeyNode) {}
+    ContainerFrame(void* pMap, void* pPreviousKeyNode)
+        : pContainer(pMap), pPrevKeyNode(pPreviousKeyNode) {}
 
     void* pContainer;
     void* pPrevKeyNode;
@@ -74,6 +82,6 @@ class GraphBuilderAdapter : public EventHandler {
   void RegisterAnchor(anchor_t anchor, void* pNode);
   void DispositionNode(void* pNode);
 };
-}
+}  // namespace YAML
 
 #endif  // GRAPHBUILDERADAPTER_H_62B23520_7C8E_11DE_8A39_0800200C9A66

src/contrib/yaml-cpp.natvis

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?> 
+<!-- MSVC Debugger visualization hints for YAML::Node and YAML::detail::node -->
+<AutoVisualizer xmlns="http://schemas.microsoft.com/vstudio/debugger/natvis/2010">
+  <Type Name="YAML::Node">
+    <DisplayString Condition="!m_isValid">{{invalid}}</DisplayString>
+    <DisplayString Condition="!m_pNode">{{pNode==nullptr}}</DisplayString>
+    <DisplayString>{{ {*m_pNode} }}</DisplayString>
+    <Expand>
+      <Item Condition="m_pNode->m_pRef._Ptr->m_pData._Ptr->m_type==YAML::NodeType::Scalar" Name="scalar">m_pNode->m_pRef._Ptr->m_pData._Ptr->m_scalar</Item>
+      <Item Condition="m_pNode->m_pRef._Ptr->m_pData._Ptr->m_type==YAML::NodeType::Sequence" Name="sequence">m_pNode->m_pRef._Ptr->m_pData._Ptr->m_sequence</Item>
+      <Item Condition="m_pNode->m_pRef._Ptr->m_pData._Ptr->m_type==YAML::NodeType::Map" Name="map">m_pNode->m_pRef._Ptr->m_pData._Ptr->m_map</Item>
+      <Item Name="[details]" >m_pNode->m_pRef._Ptr->m_pData._Ptr</Item>
+    </Expand>
+  </Type>
+
+  <Type Name="YAML::detail::node">
+    <DisplayString Condition="!m_pRef._Ptr">{{node:pRef==nullptr}}</DisplayString>
+    <DisplayString Condition="!m_pRef._Ptr->m_pData._Ptr">{{node:pRef->pData==nullptr}}</DisplayString>
+    <DisplayString Condition="!m_pRef._Ptr->m_pData._Ptr->m_isDefined">{{undefined}}</DisplayString>
+    <DisplayString Condition="m_pRef._Ptr->m_pData._Ptr->m_type==YAML::NodeType::Scalar">{{{m_pRef._Ptr->m_pData._Ptr->m_scalar}}}</DisplayString>
+    <DisplayString Condition="m_pRef._Ptr->m_pData._Ptr->m_type==YAML::NodeType::Map">{{ Map {m_pRef._Ptr->m_pData._Ptr->m_map}}}</DisplayString>
+    <DisplayString Condition="m_pRef._Ptr->m_pData._Ptr->m_type==YAML::NodeType::Sequence">{{ Seq {m_pRef._Ptr->m_pData._Ptr->m_sequence}}}</DisplayString>
+    <DisplayString>{{{m_pRef._Ptr->m_pData._Ptr->m_type}}}</DisplayString>
+    <Expand>
+      <Item Condition="m_pRef._Ptr->m_pData._Ptr->m_type==YAML::NodeType::Scalar" Name="scalar">m_pRef._Ptr->m_pData._Ptr->m_scalar</Item>
+      <Item Condition="m_pRef._Ptr->m_pData._Ptr->m_type==YAML::NodeType::Sequence" Name="sequence">m_pRef._Ptr->m_pData._Ptr->m_sequence</Item>
+      <Item Condition="m_pRef._Ptr->m_pData._Ptr->m_type==YAML::NodeType::Map" Name="map">m_pRef._Ptr->m_pData._Ptr->m_map</Item>
+      <Item Name="[details]" >m_pRef._Ptr->m_pData._Ptr</Item>
+    </Expand>
+  </Type>
+
+</AutoVisualizer>

src/contrib/yaml-cpp.natvis.md

@@ -0,0 +1,9 @@
+# MSVC debugger visualizer for YAML::Node
+
+## How to use
+Add yaml-cpp.natvis to your Visual C++ project like any other source file.  It will be included in the debug information, and improve debugger display on YAML::Node and contained types. 
+
+## Compatibility and Troubleshooting
+
+This has been tested for MSVC 2017. It is expected to be compatible with VS 2015 and VS 2019. If you have any problems, you can open an issue here: https://github.com/peterchen-cp/yaml-cpp-natvis
+

src/convert.cpp

@@ -16,11 +16,7 @@ std::string tolower(const std::string& str) {
 
 template <typename T>
 bool IsEntirely(const std::string& str, T func) {
-  for (std::size_t i = 0; i < str.size(); i++)
-    if (!func(str[i]))
-      return false;
-
-  return true;
+  return std::all_of(str.begin(), str.end(), [=](char ch) { return func(ch); });
 }
 
 // IsFlexibleCase
@@ -39,7 +35,7 @@ bool IsFlexibleCase(const std::string& str) {
   std::string rest = str.substr(1);
   return firstcaps && (IsEntirely(rest, IsLower) || IsEntirely(rest, IsUpper));
 }
-}
+}  // namespace
 
 namespace YAML {
 bool convert<bool>::decode(const Node& node, bool& rhs) {
@@ -52,19 +48,22 @@ bool convert<bool>::decode(const Node& node, bool& rhs) {
   static const struct {
     std::string truename, falsename;
   } names[] = {
-      {"y", "n"}, {"yes", "no"}, {"true", "false"}, {"on", "off"},
+      {"y", "n"},
+      {"yes", "no"},
+      {"true", "false"},
+      {"on", "off"},
   };
 
   if (!IsFlexibleCase(node.Scalar()))
     return false;
 
-  for (unsigned i = 0; i < sizeof(names) / sizeof(names[0]); i++) {
-    if (names[i].truename == tolower(node.Scalar())) {
+  for (const auto& name : names) {
+    if (name.truename == tolower(node.Scalar())) {
       rhs = true;
       return true;
     }
 
-    if (names[i].falsename == tolower(node.Scalar())) {
+    if (name.falsename == tolower(node.Scalar())) {
       rhs = false;
       return true;
     }
@@ -72,4 +71,4 @@ bool convert<bool>::decode(const Node& node, bool& rhs) {
 
   return false;
 }
-}
+}  // namespace YAML

src/depthguard.cpp

@@ -0,0 +1,9 @@
+#include "yaml-cpp/depthguard.h"
+
+namespace YAML {
+
+DeepRecursion::DeepRecursion(int depth, const Mark& mark_,
+                             const std::string& msg_)
+    : ParserException(mark_, msg_), m_depth(depth) {}
+
+}  // namespace YAML

src/directives.cpp

@@ -1,16 +1,11 @@
 #include "directives.h"
 
 namespace YAML {
-Directives::Directives() {
-  // version
-  version.isDefault = true;
-  version.major = 1;
-  version.minor = 2;
-}
+Directives::Directives() : version{true, 1, 2}, tags{} {}
 
 const std::string Directives::TranslateTagHandle(
     const std::string& handle) const {
-  std::map<std::string, std::string>::const_iterator it = tags.find(handle);
+  auto it = tags.find(handle);
   if (it == tags.end()) {
     if (handle == "!!")
       return "tag:yaml.org,2002:";
@@ -19,4 +14,4 @@ const std::string Directives::TranslateTagHandle(
 
   return it->second;
 }
-}
+}  // namespace YAML

src/emit.cpp

@@ -1,7 +1,7 @@
 #include "yaml-cpp/node/emit.h"
+#include "nodeevents.h"
 #include "yaml-cpp/emitfromevents.h"
 #include "yaml-cpp/emitter.h"
-#include "nodeevents.h"
 
 namespace YAML {
 Emitter& operator<<(Emitter& out, const Node& node) {
@@ -22,4 +22,4 @@ std::string Dump(const Node& node) {
   emitter << node;
   return emitter.c_str();
 }
-}
+}  // namespace YAML

src/emitfromevents.cpp

@@ -16,10 +16,11 @@ std::string ToString(YAML::anchor_t anchor) {
   stream << anchor;
   return stream.str();
 }
-}
+}  // namespace
 
 namespace YAML {
-EmitFromEvents::EmitFromEvents(Emitter& emitter) : m_emitter(emitter) {}
+EmitFromEvents::EmitFromEvents(Emitter& emitter)
+    : m_emitter(emitter), m_stateStack{} {}
 
 void EmitFromEvents::OnDocumentStart(const Mark&) {}
 
@@ -58,6 +59,8 @@ void EmitFromEvents::OnSequenceStart(const Mark&, const std::string& tag,
     default:
       break;
   }
+  // Restore the global settings to eliminate the override from node style
+  m_emitter.RestoreGlobalModifiedSettings();
   m_emitter << BeginSeq;
   m_stateStack.push(State::WaitingForSequenceEntry);
 }
@@ -82,6 +85,8 @@ void EmitFromEvents::OnMapStart(const Mark&, const std::string& tag,
     default:
       break;
   }
+  // Restore the global settings to eliminate the override from node style
+  m_emitter.RestoreGlobalModifiedSettings();
   m_emitter << BeginMap;
   m_stateStack.push(State::WaitingForKey);
 }
@@ -111,9 +116,9 @@ void EmitFromEvents::BeginNode() {
 }
 
 void EmitFromEvents::EmitProps(const std::string& tag, anchor_t anchor) {
-  if (!tag.empty() && tag != "?")
+  if (!tag.empty() && tag != "?" && tag != "!")
     m_emitter << VerbatimTag(tag);
   if (anchor)
     m_emitter << Anchor(ToString(anchor));
 }
-}
+}  // namespace YAML

src/emitter.cpp

@@ -11,12 +11,12 @@ namespace YAML {
 class Binary;
 struct _Null;
 
-Emitter::Emitter() : m_pState(new EmitterState) {}
+Emitter::Emitter() : m_pState(new EmitterState), m_stream{} {}
 
 Emitter::Emitter(std::ostream& stream)
     : m_pState(new EmitterState), m_stream(stream) {}
 
-Emitter::~Emitter() {}
+Emitter::~Emitter() = default;
 
 const char* Emitter::c_str() const { return m_stream.str(); }
 
@@ -49,6 +49,10 @@ bool Emitter::SetBoolFormat(EMITTER_MANIP value) {
   return ok;
 }
 
+bool Emitter::SetNullFormat(EMITTER_MANIP value) {
+  return m_pState->SetNullFormat(value, FmtScope::Global);
+}
+
 bool Emitter::SetIntBase(EMITTER_MANIP value) {
   return m_pState->SetIntFormat(value, FmtScope::Global);
 }
@@ -86,6 +90,10 @@ bool Emitter::SetDoublePrecision(std::size_t n) {
   return m_pState->SetDoublePrecision(n, FmtScope::Global);
 }
 
+void Emitter::RestoreGlobalModifiedSettings() {
+  m_pState->RestoreGlobalModifiedSettings();
+}
+
 // SetLocalValue
 // . Either start/end a group, or set a modifier locally
 Emitter& Emitter::SetLocalValue(EMITTER_MANIP value) {
@@ -197,6 +205,7 @@ void Emitter::EmitBeginSeq() {
 void Emitter::EmitEndSeq() {
   if (!good())
     return;
+  FlowType::value originalType = m_pState->CurGroupFlowType();
 
   if (m_pState->CurGroupChildCount() == 0)
     m_pState->ForceFlow();
@@ -205,8 +214,12 @@ void Emitter::EmitEndSeq() {
     if (m_stream.comment())
       m_stream << "\n";
     m_stream << IndentTo(m_pState->CurIndent());
-    if (m_pState->CurGroupChildCount() == 0)
+    if (originalType == FlowType::Block) {
       m_stream << "[";
+    } else {
+      if (m_pState->CurGroupChildCount() == 0 && !m_pState->HasBegunNode())
+        m_stream << "[";
+    }
     m_stream << "]";
   }
 
@@ -227,6 +240,7 @@ void Emitter::EmitBeginMap() {
 void Emitter::EmitEndMap() {
   if (!good())
     return;
+  FlowType::value originalType = m_pState->CurGroupFlowType();
 
   if (m_pState->CurGroupChildCount() == 0)
     m_pState->ForceFlow();
@@ -235,8 +249,12 @@ void Emitter::EmitEndMap() {
     if (m_stream.comment())
       m_stream << "\n";
     m_stream << IndentTo(m_pState->CurIndent());
-    if (m_pState->CurGroupChildCount() == 0)
+    if (originalType == FlowType::Block) {
       m_stream << "{";
+    } else {
+      if (m_pState->CurGroupChildCount() == 0 && !m_pState->HasBegunNode())
+        m_stream << "{";
+    }
     m_stream << "}";
   }
 
@@ -285,10 +303,8 @@ void Emitter::PrepareTopNode(EmitterNodeType::value child) {
   if (child == EmitterNodeType::NoType)
     return;
 
-  if (m_pState->CurGroupChildCount() > 0 && m_stream.col() > 0) {
-    if (child != EmitterNodeType::NoType)
-      EmitBeginDoc();
-  }
+  if (m_pState->CurGroupChildCount() > 0 && m_stream.col() > 0)
+    EmitBeginDoc();
 
   switch (child) {
     case EmitterNodeType::NoType:
@@ -488,6 +504,9 @@ void Emitter::FlowMapPrepareSimpleKeyValue(EmitterNodeType::value child) {
     if (m_stream.comment())
       m_stream << "\n";
     m_stream << IndentTo(lastIndent);
+    if (m_pState->HasAlias()) {
+      m_stream << " ";
+    }
     m_stream << ":";
   }
 
@@ -558,6 +577,8 @@ void Emitter::BlockMapPrepareLongKey(EmitterNodeType::value child) {
       break;
     case EmitterNodeType::BlockSeq:
     case EmitterNodeType::BlockMap:
+      if (m_pState->HasBegunContent())
+        m_stream << "\n";
       break;
   }
 }
@@ -581,8 +602,12 @@ void Emitter::BlockMapPrepareLongKeyValue(EmitterNodeType::value child) {
     case EmitterNodeType::Scalar:
     case EmitterNodeType::FlowSeq:
     case EmitterNodeType::FlowMap:
+      SpaceOrIndentTo(true, curIndent + 1);
+      break;
     case EmitterNodeType::BlockSeq:
     case EmitterNodeType::BlockMap:
+      if (m_pState->HasBegunContent())
+        m_stream << "\n";
       SpaceOrIndentTo(true, curIndent + 1);
       break;
   }
@@ -621,6 +646,9 @@ void Emitter::BlockMapPrepareSimpleKeyValue(EmitterNodeType::value child) {
   const std::size_t nextIndent = curIndent + m_pState->CurGroupIndent();
 
   if (!m_pState->HasBegunNode()) {
+    if (m_pState->HasAlias()) {
+      m_stream << " ";
+    }
     m_stream << ":";
   }
 
@@ -674,16 +702,29 @@ void Emitter::StartedScalar() { m_pState->StartedScalar(); }
 // *******************************************************************************************
 // overloads of Write
 
+StringEscaping::value GetStringEscapingStyle(const EMITTER_MANIP emitterManip) {
+  switch (emitterManip) {
+    case EscapeNonAscii:
+      return StringEscaping::NonAscii;
+    case EscapeAsJson:
+      return StringEscaping::JSON;
+    default:
+      return StringEscaping::None;
+      break;
+  }
+}
+
 Emitter& Emitter::Write(const std::string& str) {
   if (!good())
     return *this;
 
-  const bool escapeNonAscii = m_pState->GetOutputCharset() == EscapeNonAscii;
+  StringEscaping::value stringEscaping = GetStringEscapingStyle(m_pState->GetOutputCharset());
+
   const StringFormat::value strFormat =
       Utils::ComputeStringFormat(str, m_pState->GetStringFormat(),
-                                 m_pState->CurGroupFlowType(), escapeNonAscii);
+                                 m_pState->CurGroupFlowType(), stringEscaping == StringEscaping::NonAscii);
 
-  if (strFormat == StringFormat::Literal)
+  if (strFormat == StringFormat::Literal || str.size() > 1024)
     m_pState->SetMapKeyFormat(YAML::LongKey, FmtScope::Local);
 
   PrepareNode(EmitterNodeType::Scalar);
@@ -696,7 +737,7 @@ Emitter& Emitter::Write(const std::string& str) {
       Utils::WriteSingleQuotedString(m_stream, str);
       break;
     case StringFormat::DoubleQuoted:
-      Utils::WriteDoubleQuotedString(m_stream, str, escapeNonAscii);
+      Utils::WriteDoubleQuotedString(m_stream, str, stringEscaping);
       break;
     case StringFormat::Literal:
       Utils::WriteLiteralString(m_stream, str,
@@ -766,6 +807,21 @@ const char* Emitter::ComputeFullBoolName(bool b) const {
                          // these answers
 }
 
+const char* Emitter::ComputeNullName() const {
+  switch (m_pState->GetNullFormat()) {
+    case LowerNull:
+      return "null";
+    case UpperNull:
+      return "NULL";
+    case CamelNull:
+      return "Null";
+    case TildeNull:
+      // fallthrough
+    default:
+      return "~";
+  }
+}
+
 Emitter& Emitter::Write(bool b) {
   if (!good())
     return *this;
@@ -787,8 +843,10 @@ Emitter& Emitter::Write(char ch) {
   if (!good())
     return *this;
 
+
+
   PrepareNode(EmitterNodeType::Scalar);
-  Utils::WriteChar(m_stream, ch);
+  Utils::WriteChar(m_stream, ch, GetStringEscapingStyle(m_pState->GetOutputCharset()));
   StartedScalar();
 
   return *this;
@@ -812,6 +870,8 @@ Emitter& Emitter::Write(const _Alias& alias) {
 
   StartedScalar();
 
+  m_pState->SetAlias();
+
   return *this;
 }
 
@@ -889,7 +949,7 @@ Emitter& Emitter::Write(const _Null& /*null*/) {
 
   PrepareNode(EmitterNodeType::Scalar);
 
-  m_stream << "~";
+  m_stream << ComputeNullName();
 
   StartedScalar();
 
@@ -908,4 +968,4 @@ Emitter& Emitter::Write(const Binary& binary) {
 
   return *this;
 }
-}
+}  // namespace YAML

src/emitterstate.cpp

@@ -6,29 +6,35 @@
 namespace YAML {
 EmitterState::EmitterState()
     : m_isGood(true),
+      m_lastError{},
+      // default global manipulators
+      m_charset(EmitNonAscii),
+      m_strFmt(Auto),
+      m_boolFmt(TrueFalseBool),
+      m_boolLengthFmt(LongBool),
+      m_boolCaseFmt(LowerCase),
+      m_nullFmt(TildeNull),
+      m_intFmt(Dec),
+      m_indent(2),
+      m_preCommentIndent(2),
+      m_postCommentIndent(1),
+      m_seqFmt(Block),
+      m_mapFmt(Block),
+      m_mapKeyFmt(Auto),
+      m_floatPrecision(std::numeric_limits<float>::max_digits10),
+      m_doublePrecision(std::numeric_limits<double>::max_digits10),
+      //
+      m_modifiedSettings{},
+      m_globalModifiedSettings{},
+      m_groups{},
       m_curIndent(0),
       m_hasAnchor(false),
+      m_hasAlias(false),
       m_hasTag(false),
       m_hasNonContent(false),
-      m_docCount(0) {
-  // set default global manipulators
-  m_charset.set(EmitNonAscii);
-  m_strFmt.set(Auto);
-  m_boolFmt.set(TrueFalseBool);
-  m_boolLengthFmt.set(LongBool);
-  m_boolCaseFmt.set(LowerCase);
-  m_intFmt.set(Dec);
-  m_indent.set(2);
-  m_preCommentIndent.set(2);
-  m_postCommentIndent.set(1);
-  m_seqFmt.set(Block);
-  m_mapFmt.set(Block);
-  m_mapKeyFmt.set(Auto);
-  m_floatPrecision.set(std::numeric_limits<float>::digits10 + 1);
-  m_doublePrecision.set(std::numeric_limits<double>::digits10 + 1);
-}
+      m_docCount(0) {}
 
-EmitterState::~EmitterState() {}
+EmitterState::~EmitterState() = default;
 
 // SetLocalValue
 // . We blindly tries to set all possible formatters to this value
@@ -39,6 +45,7 @@ void EmitterState::SetLocalValue(EMITTER_MANIP value) {
   SetBoolFormat(value, FmtScope::Local);
   SetBoolCaseFormat(value, FmtScope::Local);
   SetBoolLengthFormat(value, FmtScope::Local);
+  SetNullFormat(value, FmtScope::Local);
   SetIntFormat(value, FmtScope::Local);
   SetFlowType(GroupType::Seq, value, FmtScope::Local);
   SetFlowType(GroupType::Map, value, FmtScope::Local);
@@ -47,37 +54,43 @@ void EmitterState::SetLocalValue(EMITTER_MANIP value) {
 
 void EmitterState::SetAnchor() { m_hasAnchor = true; }
 
+void EmitterState::SetAlias() { m_hasAlias = true; }
+
 void EmitterState::SetTag() { m_hasTag = true; }
 
 void EmitterState::SetNonContent() { m_hasNonContent = true; }
 
 void EmitterState::SetLongKey() {
   assert(!m_groups.empty());
-  if (m_groups.empty())
+  if (m_groups.empty()) {
     return;
+  }
 
-  assert(m_groups.top().type == GroupType::Map);
-  m_groups.top().longKey = true;
+  assert(m_groups.back()->type == GroupType::Map);
+  m_groups.back()->longKey = true;
 }
 
 void EmitterState::ForceFlow() {
   assert(!m_groups.empty());
-  if (m_groups.empty())
+  if (m_groups.empty()) {
     return;
+  }
 
-  m_groups.top().flowType = FlowType::Flow;
+  m_groups.back()->flowType = FlowType::Flow;
 }
 
 void EmitterState::StartedNode() {
   if (m_groups.empty()) {
     m_docCount++;
   } else {
-    m_groups.top().childCount++;
-    if (m_groups.top().childCount % 2 == 0)
-      m_groups.top().longKey = false;
+    m_groups.back()->childCount++;
+    if (m_groups.back()->childCount % 2 == 0) {
+      m_groups.back()->longKey = false;
+    }
   }
 
   m_hasAnchor = false;
+  m_hasAlias = false;
   m_hasTag = false;
   m_hasNonContent = false;
 }
@@ -87,15 +100,13 @@ EmitterNodeType::value EmitterState::NextGroupType(
   if (type == GroupType::Seq) {
     if (GetFlowType(type) == Block)
       return EmitterNodeType::BlockSeq;
-    else
-      return EmitterNodeType::FlowSeq;
-  } else {
-    if (GetFlowType(type) == Block)
-      return EmitterNodeType::BlockMap;
-    else
-      return EmitterNodeType::FlowMap;
+    return EmitterNodeType::FlowSeq;
   }
 
+  if (GetFlowType(type) == Block)
+    return EmitterNodeType::BlockMap;
+  return EmitterNodeType::FlowMap;
+
   // can't happen
   assert(false);
   return EmitterNodeType::NoType;
@@ -121,41 +132,56 @@ void EmitterState::StartedScalar() {
 void EmitterState::StartedGroup(GroupType::value type) {
   StartedNode();
 
-  const int lastGroupIndent = (m_groups.empty() ? 0 : m_groups.top().indent);
+  const std::size_t lastGroupIndent =
+      (m_groups.empty() ? 0 : m_groups.back()->indent);
   m_curIndent += lastGroupIndent;
 
-  std::auto_ptr<Group> pGroup(new Group(type));
+  // TODO: Create move constructors for settings types to simplify transfer
+  std::unique_ptr<Group> pGroup(new Group(type));
 
   // transfer settings (which last until this group is done)
-  pGroup->modifiedSettings = m_modifiedSettings;
+  //
+  // NB: if pGroup->modifiedSettings == m_modifiedSettings,
+  // m_modifiedSettings is not changed!
+  pGroup->modifiedSettings = std::move(m_modifiedSettings);
 
   // set up group
-  if (GetFlowType(type) == Block)
+  if (GetFlowType(type) == Block) {
     pGroup->flowType = FlowType::Block;
-  else
+  } else {
     pGroup->flowType = FlowType::Flow;
+  }
   pGroup->indent = GetIndent();
 
-  m_groups.push(pGroup);
+  m_groups.push_back(std::move(pGroup));
 }
 
 void EmitterState::EndedGroup(GroupType::value type) {
   if (m_groups.empty()) {
-    if (type == GroupType::Seq)
+    if (type == GroupType::Seq) {
       return SetError(ErrorMsg::UNEXPECTED_END_SEQ);
-    else
-      return SetError(ErrorMsg::UNEXPECTED_END_MAP);
+    }
+    return SetError(ErrorMsg::UNEXPECTED_END_MAP);
+  }
+
+  if (m_hasTag) {
+    SetError(ErrorMsg::INVALID_TAG);
+  }
+  if (m_hasAnchor) {
+    SetError(ErrorMsg::INVALID_ANCHOR);
   }
 
   // get rid of the current group
   {
-    std::auto_ptr<Group> pFinishedGroup = m_groups.pop();
-    if (pFinishedGroup->type != type)
+    std::unique_ptr<Group> pFinishedGroup = std::move(m_groups.back());
+    m_groups.pop_back();
+    if (pFinishedGroup->type != type) {
       return SetError(ErrorMsg::UNMATCHED_GROUP_TAG);
+    }
   }
 
   // reset old settings
-  std::size_t lastIndent = (m_groups.empty() ? 0 : m_groups.top().indent);
+  std::size_t lastIndent = (m_groups.empty() ? 0 : m_groups.back()->indent);
   assert(m_curIndent >= lastIndent);
   m_curIndent -= lastIndent;
 
@@ -164,49 +190,59 @@ void EmitterState::EndedGroup(GroupType::value type) {
   m_globalModifiedSettings.restore();
 
   ClearModifiedSettings();
+  m_hasAnchor = false;
+  m_hasTag = false;
+  m_hasNonContent = false;
 }
 
 EmitterNodeType::value EmitterState::CurGroupNodeType() const {
-  if (m_groups.empty())
+  if (m_groups.empty()) {
     return EmitterNodeType::NoType;
+  }
 
-  return m_groups.top().NodeType();
+  return m_groups.back()->NodeType();
 }
 
 GroupType::value EmitterState::CurGroupType() const {
-  return m_groups.empty() ? GroupType::NoType : m_groups.top().type;
+  return m_groups.empty() ? GroupType::NoType : m_groups.back()->type;
 }
 
 FlowType::value EmitterState::CurGroupFlowType() const {
-  return m_groups.empty() ? FlowType::NoType : m_groups.top().flowType;
+  return m_groups.empty() ? FlowType::NoType : m_groups.back()->flowType;
 }
 
-int EmitterState::CurGroupIndent() const {
-  return m_groups.empty() ? 0 : m_groups.top().indent;
+std::size_t EmitterState::CurGroupIndent() const {
+  return m_groups.empty() ? 0 : m_groups.back()->indent;
 }
 
 std::size_t EmitterState::CurGroupChildCount() const {
-  return m_groups.empty() ? m_docCount : m_groups.top().childCount;
+  return m_groups.empty() ? m_docCount : m_groups.back()->childCount;
 }
 
 bool EmitterState::CurGroupLongKey() const {
-  return m_groups.empty() ? false : m_groups.top().longKey;
+  return m_groups.empty() ? false : m_groups.back()->longKey;
 }
 
-int EmitterState::LastIndent() const {
-  if (m_groups.size() <= 1)
+std::size_t EmitterState::LastIndent() const {
+  if (m_groups.size() <= 1) {
     return 0;
+  }
 
-  return m_curIndent - m_groups.top(-1).indent;
+  return m_curIndent - m_groups[m_groups.size() - 2]->indent;
 }
 
 void EmitterState::ClearModifiedSettings() { m_modifiedSettings.clear(); }
 
+void EmitterState::RestoreGlobalModifiedSettings() {
+  m_globalModifiedSettings.restore();
+}
+
 bool EmitterState::SetOutputCharset(EMITTER_MANIP value,
                                     FmtScope::value scope) {
   switch (value) {
     case EmitNonAscii:
     case EscapeNonAscii:
+    case EscapeAsJson:
       _Set(m_charset, value, scope);
       return true;
     default:
@@ -264,6 +300,19 @@ bool EmitterState::SetBoolCaseFormat(EMITTER_MANIP value,
   }
 }
 
+bool EmitterState::SetNullFormat(EMITTER_MANIP value, FmtScope::value scope) {
+  switch (value) {
+    case LowerNull:
+    case UpperNull:
+    case CamelNull:
+    case TildeNull:
+      _Set(m_nullFmt, value, scope);
+      return true;
+    default:
+      return false;
+  }
+}
+
 bool EmitterState::SetIntFormat(EMITTER_MANIP value, FmtScope::value scope) {
   switch (value) {
     case Dec:
@@ -334,17 +383,18 @@ bool EmitterState::SetMapKeyFormat(EMITTER_MANIP value, FmtScope::value scope) {
   }
 }
 
-bool EmitterState::SetFloatPrecision(int value, FmtScope::value scope) {
-  if (value < 0 || value > std::numeric_limits<float>::digits10 + 1)
+bool EmitterState::SetFloatPrecision(std::size_t value, FmtScope::value scope) {
+  if (value > std::numeric_limits<float>::max_digits10)
     return false;
   _Set(m_floatPrecision, value, scope);
   return true;
 }
 
-bool EmitterState::SetDoublePrecision(int value, FmtScope::value scope) {
-  if (value < 0 || value > std::numeric_limits<double>::digits10 + 1)
+bool EmitterState::SetDoublePrecision(std::size_t value,
+                                      FmtScope::value scope) {
+  if (value > std::numeric_limits<double>::max_digits10)
     return false;
   _Set(m_doublePrecision, value, scope);
   return true;
 }
-}
+}  // namespace YAML

src/emitterstate.h

@@ -7,15 +7,15 @@
 #pragma once
 #endif
 
-#include "ptr_stack.h"
 #include "setting.h"
 #include "yaml-cpp/emitterdef.h"
 #include "yaml-cpp/emittermanip.h"
+
 #include <cassert>
-#include <vector>
-#include <stack>
 #include <memory>
+#include <stack>
 #include <stdexcept>
+#include <vector>
 
 namespace YAML {
 struct FmtScope {
@@ -43,6 +43,7 @@ class EmitterState {
 
   // node handling
   void SetAnchor();
+  void SetAlias();
   void SetTag();
   void SetNonContent();
   void SetLongKey();
@@ -58,13 +59,14 @@ class EmitterState {
 
   GroupType::value CurGroupType() const;
   FlowType::value CurGroupFlowType() const;
-  int CurGroupIndent() const;
+  std::size_t CurGroupIndent() const;
   std::size_t CurGroupChildCount() const;
   bool CurGroupLongKey() const;
 
-  int LastIndent() const;
-  int CurIndent() const { return m_curIndent; }
+  std::size_t LastIndent() const;
+  std::size_t CurIndent() const { return m_curIndent; }
   bool HasAnchor() const { return m_hasAnchor; }
+  bool HasAlias() const { return m_hasAlias; }
   bool HasTag() const { return m_hasTag; }
   bool HasBegunNode() const {
     return m_hasAnchor || m_hasTag || m_hasNonContent;
@@ -72,6 +74,7 @@ class EmitterState {
   bool HasBegunContent() const { return m_hasAnchor || m_hasTag; }
 
   void ClearModifiedSettings();
+  void RestoreGlobalModifiedSettings();
 
   // formatters
   void SetLocalValue(EMITTER_MANIP value);
@@ -91,16 +94,19 @@ class EmitterState {
   bool SetBoolCaseFormat(EMITTER_MANIP value, FmtScope::value scope);
   EMITTER_MANIP GetBoolCaseFormat() const { return m_boolCaseFmt.get(); }
 
+  bool SetNullFormat(EMITTER_MANIP value, FmtScope::value scope);
+  EMITTER_MANIP GetNullFormat() const { return m_nullFmt.get(); }
+
   bool SetIntFormat(EMITTER_MANIP value, FmtScope::value scope);
   EMITTER_MANIP GetIntFormat() const { return m_intFmt.get(); }
 
   bool SetIndent(std::size_t value, FmtScope::value scope);
-  int GetIndent() const { return m_indent.get(); }
+  std::size_t GetIndent() const { return m_indent.get(); }
 
   bool SetPreCommentIndent(std::size_t value, FmtScope::value scope);
-  int GetPreCommentIndent() const { return m_preCommentIndent.get(); }
+  std::size_t GetPreCommentIndent() const { return m_preCommentIndent.get(); }
   bool SetPostCommentIndent(std::size_t value, FmtScope::value scope);
-  int GetPostCommentIndent() const { return m_postCommentIndent.get(); }
+  std::size_t GetPostCommentIndent() const { return m_postCommentIndent.get(); }
 
   bool SetFlowType(GroupType::value groupType, EMITTER_MANIP value,
                    FmtScope::value scope);
@@ -109,9 +115,9 @@ class EmitterState {
   bool SetMapKeyFormat(EMITTER_MANIP value, FmtScope::value scope);
   EMITTER_MANIP GetMapKeyFormat() const { return m_mapKeyFmt.get(); }
 
-  bool SetFloatPrecision(int value, FmtScope::value scope);
+  bool SetFloatPrecision(std::size_t value, FmtScope::value scope);
   std::size_t GetFloatPrecision() const { return m_floatPrecision.get(); }
-  bool SetDoublePrecision(int value, FmtScope::value scope);
+  bool SetDoublePrecision(std::size_t value, FmtScope::value scope);
   std::size_t GetDoublePrecision() const { return m_doublePrecision.get(); }
 
  private:
@@ -131,25 +137,31 @@ class EmitterState {
   Setting<EMITTER_MANIP> m_boolFmt;
   Setting<EMITTER_MANIP> m_boolLengthFmt;
   Setting<EMITTER_MANIP> m_boolCaseFmt;
+  Setting<EMITTER_MANIP> m_nullFmt;
   Setting<EMITTER_MANIP> m_intFmt;
   Setting<std::size_t> m_indent;
   Setting<std::size_t> m_preCommentIndent, m_postCommentIndent;
   Setting<EMITTER_MANIP> m_seqFmt;
   Setting<EMITTER_MANIP> m_mapFmt;
   Setting<EMITTER_MANIP> m_mapKeyFmt;
-  Setting<int> m_floatPrecision;
-  Setting<int> m_doublePrecision;
+  Setting<std::size_t> m_floatPrecision;
+  Setting<std::size_t> m_doublePrecision;
 
   SettingChanges m_modifiedSettings;
   SettingChanges m_globalModifiedSettings;
 
   struct Group {
     explicit Group(GroupType::value type_)
-        : type(type_), indent(0), childCount(0), longKey(false) {}
+        : type(type_),
+          flowType{},
+          indent(0),
+          childCount(0),
+          longKey(false),
+          modifiedSettings{} {}
 
     GroupType::value type;
     FlowType::value flowType;
-    int indent;
+    std::size_t indent;
     std::size_t childCount;
     bool longKey;
 
@@ -174,9 +186,10 @@ class EmitterState {
     }
   };
 
-  ptr_stack<Group> m_groups;
+  std::vector<std::unique_ptr<Group>> m_groups;
   std::size_t m_curIndent;
   bool m_hasAnchor;
+  bool m_hasAlias;
   bool m_hasTag;
   bool m_hasNonContent;
   std::size_t m_docCount;
@@ -198,6 +211,6 @@ void EmitterState::_Set(Setting<T>& fmt, T value, FmtScope::value scope) {
       assert(false);
   }
 }
-}
+}  // namespace YAML
 
 #endif  // EMITTERSTATE_H_62B23520_7C8E_11DE_8A39_0800200C9A66

src/emitterutils.cpp

@@ -1,3 +1,4 @@
+#include <algorithm>
 #include <iomanip>
 #include <sstream>
 
@@ -8,6 +9,7 @@
 #include "regeximpl.h"
 #include "stringsource.h"
 #include "yaml-cpp/binary.h"  // IWYU pragma: keep
+#include "yaml-cpp/null.h"
 #include "yaml-cpp/ostream_wrapper.h"
 
 namespace YAML {
@@ -133,12 +135,12 @@ void WriteCodePoint(ostream_wrapper& out, int codePoint) {
   if (codePoint < 0 || codePoint > 0x10FFFF) {
     codePoint = REPLACEMENT_CHARACTER;
   }
-  if (codePoint < 0x7F) {
+  if (codePoint <= 0x7F) {
     out << static_cast<char>(codePoint);
-  } else if (codePoint < 0x7FF) {
+  } else if (codePoint <= 0x7FF) {
     out << static_cast<char>(0xC0 | (codePoint >> 6))
         << static_cast<char>(0x80 | (codePoint & 0x3F));
-  } else if (codePoint < 0xFFFF) {
+  } else if (codePoint <= 0xFFFF) {
     out << static_cast<char>(0xE0 | (codePoint >> 12))
         << static_cast<char>(0x80 | ((codePoint >> 6) & 0x3F))
         << static_cast<char>(0x80 | (codePoint & 0x3F));
@@ -152,12 +154,8 @@ void WriteCodePoint(ostream_wrapper& out, int codePoint) {
 
 bool IsValidPlainScalar(const std::string& str, FlowType::value flowType,
                         bool allowOnlyAscii) {
-  if (str.empty()) {
-    return false;
-  }
-
   // check against null
-  if (str == "null") {
+  if (IsNullString(str)) {
     return false;
   }
 
@@ -176,12 +174,12 @@ bool IsValidPlainScalar(const std::string& str, FlowType::value flowType,
 
   // then check until something is disallowed
   static const RegEx& disallowed_flow =
-      Exp::EndScalarInFlow() || (Exp::BlankOrBreak() + Exp::Comment()) ||
-      Exp::NotPrintable() || Exp::Utf8_ByteOrderMark() || Exp::Break() ||
+      Exp::EndScalarInFlow() | (Exp::BlankOrBreak() + Exp::Comment()) |
+      Exp::NotPrintable() | Exp::Utf8_ByteOrderMark() | Exp::Break() |
       Exp::Tab();
   static const RegEx& disallowed_block =
-      Exp::EndScalar() || (Exp::BlankOrBreak() + Exp::Comment()) ||
-      Exp::NotPrintable() || Exp::Utf8_ByteOrderMark() || Exp::Break() ||
+      Exp::EndScalar() | (Exp::BlankOrBreak() + Exp::Comment()) |
+      Exp::NotPrintable() | Exp::Utf8_ByteOrderMark() | Exp::Break() |
       Exp::Tab();
   const RegEx& disallowed =
       flowType == FlowType::Flow ? disallowed_flow : disallowed_block;
@@ -202,15 +200,10 @@ bool IsValidPlainScalar(const std::string& str, FlowType::value flowType,
 
 bool IsValidSingleQuotedScalar(const std::string& str, bool escapeNonAscii) {
   // TODO: check for non-printable characters?
-  for (std::size_t i = 0; i < str.size(); i++) {
-    if (escapeNonAscii && (0x80 <= static_cast<unsigned char>(str[i]))) {
-      return false;
-    }
-    if (str[i] == '\n') {
-      return false;
-    }
-  }
-  return true;
+  return std::none_of(str.begin(), str.end(), [=](char ch) {
+    return (escapeNonAscii && (0x80 <= static_cast<unsigned char>(ch))) ||
+           (ch == '\n');
+  });
 }
 
 bool IsValidLiteralScalar(const std::string& str, FlowType::value flowType,
@@ -220,28 +213,39 @@ bool IsValidLiteralScalar(const std::string& str, FlowType::value flowType,
   }
 
   // TODO: check for non-printable characters?
-  for (std::size_t i = 0; i < str.size(); i++) {
-    if (escapeNonAscii && (0x80 <= static_cast<unsigned char>(str[i]))) {
-      return false;
-    }
-  }
-  return true;
+  return std::none_of(str.begin(), str.end(), [=](char ch) {
+    return (escapeNonAscii && (0x80 <= static_cast<unsigned char>(ch)));
+  });
 }
 
-void WriteDoubleQuoteEscapeSequence(ostream_wrapper& out, int codePoint) {
+std::pair<uint16_t, uint16_t> EncodeUTF16SurrogatePair(int codePoint) {
+  const uint32_t leadOffset = 0xD800 - (0x10000 >> 10);
+
+  return {
+    leadOffset | (codePoint >> 10),
+    0xDC00 | (codePoint & 0x3FF),
+  };
+}
+
+void WriteDoubleQuoteEscapeSequence(ostream_wrapper& out, int codePoint, StringEscaping::value stringEscapingStyle) {
   static const char hexDigits[] = "0123456789abcdef";
 
   out << "\\";
   int digits = 8;
-  if (codePoint < 0xFF) {
+  if (codePoint < 0xFF && stringEscapingStyle != StringEscaping::JSON) {
     out << "x";
     digits = 2;
   } else if (codePoint < 0xFFFF) {
     out << "u";
     digits = 4;
-  } else {
+  } else if (stringEscapingStyle != StringEscaping::JSON) {
     out << "U";
     digits = 8;
+  } else {
+    auto surrogatePair = EncodeUTF16SurrogatePair(codePoint);
+    WriteDoubleQuoteEscapeSequence(out, surrogatePair.first, stringEscapingStyle);
+    WriteDoubleQuoteEscapeSequence(out, surrogatePair.second, stringEscapingStyle);
+    return;
   }
 
   // Write digits into the escape sequence
@@ -261,7 +265,7 @@ bool WriteAliasName(ostream_wrapper& out, const std::string& str) {
   }
   return true;
 }
-}
+}  // namespace
 
 StringFormat::value ComputeStringFormat(const std::string& str,
                                         EMITTER_MANIP strFormat,
@@ -313,7 +317,7 @@ bool WriteSingleQuotedString(ostream_wrapper& out, const std::string& str) {
 }
 
 bool WriteDoubleQuotedString(ostream_wrapper& out, const std::string& str,
-                             bool escapeNonAscii) {
+                             StringEscaping::value stringEscaping) {
   out << "\"";
   int codePoint;
   for (std::string::const_iterator i = str.begin();
@@ -337,16 +341,19 @@ bool WriteDoubleQuotedString(ostream_wrapper& out, const std::string& str,
       case '\b':
         out << "\\b";
         break;
+      case '\f':
+        out << "\\f";
+        break;
       default:
         if (codePoint < 0x20 ||
             (codePoint >= 0x80 &&
              codePoint <= 0xA0)) {  // Control characters and non-breaking space
-          WriteDoubleQuoteEscapeSequence(out, codePoint);
+          WriteDoubleQuoteEscapeSequence(out, codePoint, stringEscaping);
         } else if (codePoint == 0xFEFF) {  // Byte order marks (ZWNS) should be
                                            // escaped (YAML 1.2, sec. 5.2)
-          WriteDoubleQuoteEscapeSequence(out, codePoint);
-        } else if (escapeNonAscii && codePoint > 0x7E) {
-          WriteDoubleQuoteEscapeSequence(out, codePoint);
+          WriteDoubleQuoteEscapeSequence(out, codePoint, stringEscaping);
+        } else if (stringEscaping == StringEscaping::NonAscii && codePoint > 0x7E) {
+          WriteDoubleQuoteEscapeSequence(out, codePoint, stringEscaping);
         } else {
           WriteCodePoint(out, codePoint);
         }
@@ -357,42 +364,50 @@ bool WriteDoubleQuotedString(ostream_wrapper& out, const std::string& str,
 }
 
 bool WriteLiteralString(ostream_wrapper& out, const std::string& str,
-                        int indent) {
+                        std::size_t indent) {
   out << "|\n";
-  out << IndentTo(indent);
   int codePoint;
   for (std::string::const_iterator i = str.begin();
        GetNextCodePointAndAdvance(codePoint, i, str.end());) {
     if (codePoint == '\n') {
-      out << "\n" << IndentTo(indent);
+      out << "\n";
     } else {
+      out<< IndentTo(indent);
       WriteCodePoint(out, codePoint);
     }
   }
   return true;
 }
 
-bool WriteChar(ostream_wrapper& out, char ch) {
+bool WriteChar(ostream_wrapper& out, char ch, StringEscaping::value stringEscapingStyle) {
   if (('a' <= ch && ch <= 'z') || ('A' <= ch && ch <= 'Z')) {
     out << ch;
-  } else if ((0x20 <= ch && ch <= 0x7e) || ch == ' ') {
-    out << "\"" << ch << "\"";
+  } else if (ch == '\"') {
+    out << R"("\"")";
   } else if (ch == '\t') {
-    out << "\"\\t\"";
+    out << R"("\t")";
   } else if (ch == '\n') {
-    out << "\"\\n\"";
+    out << R"("\n")";
   } else if (ch == '\b') {
-    out << "\"\\b\"";
+    out << R"("\b")";
+  } else if (ch == '\r') {
+    out << R"("\r")";
+  } else if (ch == '\f') {
+    out << R"("\f")";
+  } else if (ch == '\\') {
+    out << R"("\\")";
+  } else if (0x20 <= ch && ch <= 0x7e) {
+    out << "\"" << ch << "\"";
   } else {
     out << "\"";
-    WriteDoubleQuoteEscapeSequence(out, ch);
+    WriteDoubleQuoteEscapeSequence(out, ch, stringEscapingStyle);
     out << "\"";
   }
   return true;
 }
 
 bool WriteComment(ostream_wrapper& out, const std::string& str,
-                  int postCommentIndent) {
+                  std::size_t postCommentIndent) {
   const std::size_t curIndent = out.col();
   out << "#" << Indentation(postCommentIndent);
   out.set_comment();
@@ -400,8 +415,8 @@ bool WriteComment(ostream_wrapper& out, const std::string& str,
   for (std::string::const_iterator i = str.begin();
        GetNextCodePointAndAdvance(codePoint, i, str.end());) {
     if (codePoint == '\n') {
-      out << "\n" << IndentTo(curIndent) << "#"
-          << Indentation(postCommentIndent);
+      out << "\n"
+          << IndentTo(curIndent) << "#" << Indentation(postCommentIndent);
       out.set_comment();
     } else {
       WriteCodePoint(out, codePoint);
@@ -475,8 +490,8 @@ bool WriteTagWithPrefix(ostream_wrapper& out, const std::string& prefix,
 
 bool WriteBinary(ostream_wrapper& out, const Binary& binary) {
   WriteDoubleQuotedString(out, EncodeBase64(binary.data(), binary.size()),
-                          false);
+                          StringEscaping::None);
   return true;
 }
-}
-}
+}  // namespace Utils
+}  // namespace YAML

src/emitterutils.h

@@ -24,6 +24,10 @@ struct StringFormat {
   enum value { Plain, SingleQuoted, DoubleQuoted, Literal };
 };
 
+struct StringEscaping {
+  enum value { None, NonAscii, JSON };
+};
+
 namespace Utils {
 StringFormat::value ComputeStringFormat(const std::string& str,
                                         EMITTER_MANIP strFormat,
@@ -32,12 +36,13 @@ StringFormat::value ComputeStringFormat(const std::string& str,
 
 bool WriteSingleQuotedString(ostream_wrapper& out, const std::string& str);
 bool WriteDoubleQuotedString(ostream_wrapper& out, const std::string& str,
-                             bool escapeNonAscii);
+                             StringEscaping::value stringEscaping);
 bool WriteLiteralString(ostream_wrapper& out, const std::string& str,
-                        int indent);
-bool WriteChar(ostream_wrapper& out, char ch);
+                        std::size_t indent);
+bool WriteChar(ostream_wrapper& out, char ch,
+               StringEscaping::value stringEscapingStyle);
 bool WriteComment(ostream_wrapper& out, const std::string& str,
-                  int postCommentIndent);
+                  std::size_t postCommentIndent);
 bool WriteAlias(ostream_wrapper& out, const std::string& str);
 bool WriteAnchor(ostream_wrapper& out, const std::string& str);
 bool WriteTag(ostream_wrapper& out, const std::string& str, bool verbatim);

src/exceptions.cpp

@@ -0,0 +1,20 @@
+#include "yaml-cpp/exceptions.h"
+#include "yaml-cpp/noexcept.h"
+
+namespace YAML {
+
+// These destructors are defined out-of-line so the vtable is only emitted once.
+Exception::~Exception() YAML_CPP_NOEXCEPT = default;
+ParserException::~ParserException() YAML_CPP_NOEXCEPT = default;
+RepresentationException::~RepresentationException() YAML_CPP_NOEXCEPT = default;
+InvalidScalar::~InvalidScalar() YAML_CPP_NOEXCEPT = default;
+KeyNotFound::~KeyNotFound() YAML_CPP_NOEXCEPT = default;
+InvalidNode::~InvalidNode() YAML_CPP_NOEXCEPT = default;
+BadConversion::~BadConversion() YAML_CPP_NOEXCEPT = default;
+BadDereference::~BadDereference() YAML_CPP_NOEXCEPT = default;
+BadSubscript::~BadSubscript() YAML_CPP_NOEXCEPT = default;
+BadPushback::~BadPushback() YAML_CPP_NOEXCEPT = default;
+BadInsert::~BadInsert() YAML_CPP_NOEXCEPT = default;
+EmitterException::~EmitterException() YAML_CPP_NOEXCEPT = default;
+BadFile::~BadFile() YAML_CPP_NOEXCEPT = default;
+}  // namespace YAML

src/exp.cpp

@@ -12,8 +12,7 @@ namespace YAML {
 namespace Exp {
 unsigned ParseHex(const std::string& str, const Mark& mark) {
   unsigned value = 0;
-  for (std::size_t i = 0; i < str.size(); i++) {
-    char ch = str[i];
+  for (char ch : str) {
     int digit = 0;
     if ('a' <= ch && ch <= 'f')
       digit = ch - 'a' + 10;
@@ -55,14 +54,16 @@ std::string Escape(Stream& in, int codeLength) {
   // now break it up into chars
   if (value <= 0x7F)
     return Str(value);
-  else if (value <= 0x7FF)
+
+  if (value <= 0x7FF)
     return Str(0xC0 + (value >> 6)) + Str(0x80 + (value & 0x3F));
-  else if (value <= 0xFFFF)
+
+  if (value <= 0xFFFF)
     return Str(0xE0 + (value >> 12)) + Str(0x80 + ((value >> 6) & 0x3F)) +
            Str(0x80 + (value & 0x3F));
-  else
-    return Str(0xF0 + (value >> 18)) + Str(0x80 + ((value >> 12) & 0x3F)) +
-           Str(0x80 + ((value >> 6) & 0x3F)) + Str(0x80 + (value & 0x3F));
+
+  return Str(0xF0 + (value >> 18)) + Str(0x80 + ((value >> 12) & 0x3F)) +
+         Str(0x80 + ((value >> 6) & 0x3F)) + Str(0x80 + (value & 0x3F));
 }
 
 // Escape
@@ -104,7 +105,7 @@ std::string Escape(Stream& in) {
     case 'e':
       return "\x1B";
     case ' ':
-      return "\x20";
+      return R"( )";
     case '\"':
       return "\"";
     case '\'':
@@ -132,5 +133,5 @@ std::string Escape(Stream& in) {
   std::stringstream msg;
   throw ParserException(in.mark(), std::string(ErrorMsg::INVALID_ESCAPE) + ch);
 }
-}
-}
+}  // namespace Exp
+}  // namespace YAML

src/exp.h

@@ -20,6 +20,10 @@ namespace YAML {
 
 namespace Exp {
 // misc
+inline const RegEx& Empty() {
+  static const RegEx e;
+  return e;
+}
 inline const RegEx& Space() {
   static const RegEx e = RegEx(' ');
   return e;
@@ -29,15 +33,15 @@ inline const RegEx& Tab() {
   return e;
 }
 inline const RegEx& Blank() {
-  static const RegEx e = Space() || Tab();
+  static const RegEx e = Space() | Tab();
   return e;
 }
 inline const RegEx& Break() {
-  static const RegEx e = RegEx('\n') || RegEx("\r\n");
+  static const RegEx e = RegEx('\n') | RegEx("\r\n");
   return e;
 }
 inline const RegEx& BlankOrBreak() {
-  static const RegEx e = Blank() || Break();
+  static const RegEx e = Blank() | Break();
   return e;
 }
 inline const RegEx& Digit() {
@@ -45,29 +49,29 @@ inline const RegEx& Digit() {
   return e;
 }
 inline const RegEx& Alpha() {
-  static const RegEx e = RegEx('a', 'z') || RegEx('A', 'Z');
+  static const RegEx e = RegEx('a', 'z') | RegEx('A', 'Z');
   return e;
 }
 inline const RegEx& AlphaNumeric() {
-  static const RegEx e = Alpha() || Digit();
+  static const RegEx e = Alpha() | Digit();
   return e;
 }
 inline const RegEx& Word() {
-  static const RegEx e = AlphaNumeric() || RegEx('-');
+  static const RegEx e = AlphaNumeric() | RegEx('-');
   return e;
 }
 inline const RegEx& Hex() {
-  static const RegEx e = Digit() || RegEx('A', 'F') || RegEx('a', 'f');
+  static const RegEx e = Digit() | RegEx('A', 'F') | RegEx('a', 'f');
   return e;
 }
 // Valid Unicode code points that are not part of c-printable (YAML 1.2, sec.
 // 5.1)
 inline const RegEx& NotPrintable() {
   static const RegEx e =
-      RegEx(0) ||
-      RegEx("\x01\x02\x03\x04\x05\x06\x07\x08\x0B\x0C\x7F", REGEX_OR) ||
-      RegEx(0x0E, 0x1F) ||
-      (RegEx('\xC2') + (RegEx('\x80', '\x84') || RegEx('\x86', '\x9F')));
+      RegEx(0) |
+      RegEx("\x01\x02\x03\x04\x05\x06\x07\x08\x0B\x0C\x7F", REGEX_OR) |
+      RegEx(0x0E, 0x1F) |
+      (RegEx('\xC2') + (RegEx('\x80', '\x84') | RegEx('\x86', '\x9F')));
   return e;
 }
 inline const RegEx& Utf8_ByteOrderMark() {
@@ -78,19 +82,19 @@ inline const RegEx& Utf8_ByteOrderMark() {
 // actual tags
 
 inline const RegEx& DocStart() {
-  static const RegEx e = RegEx("---") + (BlankOrBreak() || RegEx());
+  static const RegEx e = RegEx("---") + (BlankOrBreak() | RegEx());
   return e;
 }
 inline const RegEx& DocEnd() {
-  static const RegEx e = RegEx("...") + (BlankOrBreak() || RegEx());
+  static const RegEx e = RegEx("...") + (BlankOrBreak() | RegEx());
   return e;
 }
 inline const RegEx& DocIndicator() {
-  static const RegEx e = DocStart() || DocEnd();
+  static const RegEx e = DocStart() | DocEnd();
   return e;
 }
 inline const RegEx& BlockEntry() {
-  static const RegEx e = RegEx('-') + (BlankOrBreak() || RegEx());
+  static const RegEx e = RegEx('-') + (BlankOrBreak() | RegEx());
   return e;
 }
 inline const RegEx& Key() {
@@ -102,11 +106,11 @@ inline const RegEx& KeyInFlow() {
   return e;
 }
 inline const RegEx& Value() {
-  static const RegEx e = RegEx(':') + (BlankOrBreak() || RegEx());
+  static const RegEx e = RegEx(':') + (BlankOrBreak() | RegEx());
   return e;
 }
 inline const RegEx& ValueInFlow() {
-  static const RegEx e = RegEx(':') + (BlankOrBreak() || RegEx(",}", REGEX_OR));
+  static const RegEx e = RegEx(':') + (BlankOrBreak() | RegEx(",]}", REGEX_OR));
   return e;
 }
 inline const RegEx& ValueInJSONFlow() {
@@ -118,20 +122,20 @@ inline const RegEx Comment() {
   return e;
 }
 inline const RegEx& Anchor() {
-  static const RegEx e = !(RegEx("[]{},", REGEX_OR) || BlankOrBreak());
+  static const RegEx e = !(RegEx("[]{},", REGEX_OR) | BlankOrBreak());
   return e;
 }
 inline const RegEx& AnchorEnd() {
-  static const RegEx e = RegEx("?:,]}%@`", REGEX_OR) || BlankOrBreak();
+  static const RegEx e = RegEx("?:,]}%@`", REGEX_OR) | BlankOrBreak();
   return e;
 }
 inline const RegEx& URI() {
-  static const RegEx e = Word() || RegEx("#;/?:@&=+$,_.!~*'()[]", REGEX_OR) ||
+  static const RegEx e = Word() | RegEx("#;/?:@&=+$,_.!~*'()[]", REGEX_OR) |
                          (RegEx('%') + Hex() + Hex());
   return e;
 }
 inline const RegEx& Tag() {
-  static const RegEx e = Word() || RegEx("#;/?:@&=+$_.~*'", REGEX_OR) ||
+  static const RegEx e = Word() | RegEx("#;/?:@&=+$_.~*'()", REGEX_OR) |
                          (RegEx('%') + Hex() + Hex());
   return e;
 }
@@ -144,27 +148,36 @@ inline const RegEx& Tag() {
 // space.
 inline const RegEx& PlainScalar() {
   static const RegEx e =
-      !(BlankOrBreak() || RegEx(",[]{}#&*!|>\'\"%@`", REGEX_OR) ||
-        (RegEx("-?:", REGEX_OR) + (BlankOrBreak() || RegEx())));
+      !(BlankOrBreak() | RegEx(",[]{}#&*!|>\'\"%@`", REGEX_OR) |
+        (RegEx("-?:", REGEX_OR) + (BlankOrBreak() | RegEx())));
   return e;
 }
 inline const RegEx& PlainScalarInFlow() {
   static const RegEx e =
-      !(BlankOrBreak() || RegEx("?,[]{}#&*!|>\'\"%@`", REGEX_OR) ||
-        (RegEx("-:", REGEX_OR) + Blank()));
+      !(BlankOrBreak() | RegEx("?,[]{}#&*!|>\'\"%@`", REGEX_OR) |
+        (RegEx("-:", REGEX_OR) + (Blank() | RegEx())));
   return e;
 }
 inline const RegEx& EndScalar() {
-  static const RegEx e = RegEx(':') + (BlankOrBreak() || RegEx());
+  static const RegEx e = RegEx(':') + (BlankOrBreak() | RegEx());
   return e;
 }
 inline const RegEx& EndScalarInFlow() {
   static const RegEx e =
-      (RegEx(':') + (BlankOrBreak() || RegEx() || RegEx(",]}", REGEX_OR))) ||
+      (RegEx(':') + (BlankOrBreak() | RegEx() | RegEx(",]}", REGEX_OR))) |
       RegEx(",?[]{}", REGEX_OR);
   return e;
 }
 
+inline const RegEx& ScanScalarEndInFlow() {
+  static const RegEx e = (EndScalarInFlow() | (BlankOrBreak() + Comment()));
+  return e;
+}
+
+inline const RegEx& ScanScalarEnd() {
+  static const RegEx e = EndScalar() | (BlankOrBreak() + Comment());
+  return e;
+}
 inline const RegEx& EscSingleQuote() {
   static const RegEx e = RegEx("\'\'");
   return e;
@@ -179,15 +192,15 @@ inline const RegEx& ChompIndicator() {
   return e;
 }
 inline const RegEx& Chomp() {
-  static const RegEx e = (ChompIndicator() + Digit()) ||
-                         (Digit() + ChompIndicator()) || ChompIndicator() ||
+  static const RegEx e = (ChompIndicator() + Digit()) |
+                         (Digit() + ChompIndicator()) | ChompIndicator() |
                          Digit();
   return e;
 }
 
 // and some functions
 std::string Escape(Stream& in);
-}
+}  // namespace Exp
 
 namespace Keys {
 const char Directive = '%';
@@ -203,7 +216,7 @@ const char LiteralScalar = '|';
 const char FoldedScalar = '>';
 const char VerbatimTagStart = '<';
 const char VerbatimTagEnd = '>';
-}
-}
+}  // namespace Keys
+}  // namespace YAML
 
 #endif  // EXP_H_62B23520_7C8E_11DE_8A39_0800200C9A66

src/memory.cpp

@@ -22,5 +22,5 @@ node& memory::create_node() {
 void memory::merge(const memory& rhs) {
   m_nodes.insert(rhs.m_nodes.begin(), rhs.m_nodes.end());
 }
-}
-}
+}  // namespace detail
+}  // namespace YAML

src/node.cpp

@@ -9,4 +9,4 @@ Node Clone(const Node& node) {
   events.Emit(builder);
   return builder.Root();
 }
-}
+}  // namespace YAML

src/node_data.cpp

@@ -1,5 +1,6 @@
-#include <assert.h>
-#include <boost/smart_ptr/shared_ptr.hpp>
+#include <algorithm>
+#include <cassert>
+#include <iterator>
 #include <sstream>
 
 #include "yaml-cpp/exceptions.h"
@@ -12,14 +13,24 @@
 
 namespace YAML {
 namespace detail {
+YAML_CPP_API std::atomic<size_t> node::m_amount{0};
 
-std::string node_data::empty_scalar;
+const std::string& node_data::empty_scalar() {
+  static const std::string svalue;
+  return svalue;
+}
 
 node_data::node_data()
     : m_isDefined(false),
+      m_mark(Mark::null_mark()),
       m_type(NodeType::Null),
+      m_tag{},
       m_style(EmitterStyle::Default),
-      m_seqSize(0) {}
+      m_scalar{},
+      m_sequence{},
+      m_seqSize(0),
+      m_map{},
+      m_undefinedPairs{} {}
 
 void node_data::mark_defined() {
   if (m_type == NodeType::Undefined)
@@ -27,6 +38,8 @@ void node_data::mark_defined() {
   m_isDefined = true;
 }
 
+void node_data::set_mark(const Mark& mark) { m_mark = mark; }
+
 void node_data::set_type(NodeType::value type) {
   if (type == NodeType::Undefined) {
     m_type = type;
@@ -97,9 +110,9 @@ void node_data::compute_seq_size() const {
 }
 
 void node_data::compute_map_size() const {
-  kv_pairs::iterator it = m_undefinedPairs.begin();
+  auto it = m_undefinedPairs.begin();
   while (it != m_undefinedPairs.end()) {
-    kv_pairs::iterator jt = boost::next(it);
+    auto jt = std::next(it);
     if (it->first->is_defined() && it->second->is_defined())
       m_undefinedPairs.erase(it);
     it = jt;
@@ -108,7 +121,7 @@ void node_data::compute_map_size() const {
 
 const_node_iterator node_data::begin() const {
   if (!m_isDefined)
-    return const_node_iterator();
+    return {};
 
   switch (m_type) {
     case NodeType::Sequence:
@@ -116,13 +129,13 @@ const_node_iterator node_data::begin() const {
     case NodeType::Map:
       return const_node_iterator(m_map.begin(), m_map.end());
     default:
-      return const_node_iterator();
+      return {};
   }
 }
 
 node_iterator node_data::begin() {
   if (!m_isDefined)
-    return node_iterator();
+    return {};
 
   switch (m_type) {
     case NodeType::Sequence:
@@ -130,13 +143,13 @@ node_iterator node_data::begin() {
     case NodeType::Map:
       return node_iterator(m_map.begin(), m_map.end());
     default:
-      return node_iterator();
+      return {};
   }
 }
 
 const_node_iterator node_data::end() const {
   if (!m_isDefined)
-    return const_node_iterator();
+    return {};
 
   switch (m_type) {
     case NodeType::Sequence:
@@ -144,13 +157,13 @@ const_node_iterator node_data::end() const {
     case NodeType::Map:
       return const_node_iterator(m_map.end(), m_map.end());
     default:
-      return const_node_iterator();
+      return {};
   }
 }
 
 node_iterator node_data::end() {
   if (!m_isDefined)
-    return node_iterator();
+    return {};
 
   switch (m_type) {
     case NodeType::Sequence:
@@ -158,12 +171,13 @@ node_iterator node_data::end() {
     case NodeType::Map:
       return node_iterator(m_map.end(), m_map.end());
     default:
-      return node_iterator();
+      return {};
   }
 }
 
 // sequence
-void node_data::push_back(node& node, shared_memory_holder /* pMemory */) {
+void node_data::push_back(node& node,
+                          const shared_memory_holder& /* pMemory */) {
   if (m_type == NodeType::Undefined || m_type == NodeType::Null) {
     m_type = NodeType::Sequence;
     reset_sequence();
@@ -175,7 +189,8 @@ void node_data::push_back(node& node, shared_memory_holder /* pMemory */) {
   m_sequence.push_back(&node);
 }
 
-void node_data::insert(node& key, node& value, shared_memory_holder pMemory) {
+void node_data::insert(node& key, node& value,
+                       const shared_memory_holder& pMemory) {
   switch (m_type) {
     case NodeType::Map:
       break;
@@ -185,27 +200,28 @@ void node_data::insert(node& key, node& value, shared_memory_holder pMemory) {
       convert_to_map(pMemory);
       break;
     case NodeType::Scalar:
-      throw BadSubscript();
+      throw BadSubscript(m_mark, key);
   }
 
   insert_map_pair(key, value);
 }
 
 // indexing
-node* node_data::get(node& key, shared_memory_holder /* pMemory */) const {
+node* node_data::get(node& key,
+                     const shared_memory_holder& /* pMemory */) const {
   if (m_type != NodeType::Map) {
-    return NULL;
+    return nullptr;
   }
 
-  for (node_map::const_iterator it = m_map.begin(); it != m_map.end(); ++it) {
-    if (it->first->is(key))
-      return it->second;
+  for (const auto& it : m_map) {
+    if (it.first->is(key))
+      return it.second;
   }
 
-  return NULL;
+  return nullptr;
 }
 
-node& node_data::get(node& key, shared_memory_holder pMemory) {
+node& node_data::get(node& key, const shared_memory_holder& pMemory) {
   switch (m_type) {
     case NodeType::Map:
       break;
@@ -215,12 +231,12 @@ node& node_data::get(node& key, shared_memory_holder pMemory) {
       convert_to_map(pMemory);
       break;
     case NodeType::Scalar:
-      throw BadSubscript();
+      throw BadSubscript(m_mark, key);
   }
 
-  for (node_map::const_iterator it = m_map.begin(); it != m_map.end(); ++it) {
-    if (it->first->is(key))
-      return *it->second;
+  for (const auto& it : m_map) {
+    if (it.first->is(key))
+      return *it.second;
   }
 
   node& value = pMemory->create_node();
@@ -228,15 +244,26 @@ node& node_data::get(node& key, shared_memory_holder pMemory) {
   return value;
 }
 
-bool node_data::remove(node& key, shared_memory_holder /* pMemory */) {
+bool node_data::remove(node& key, const shared_memory_holder& /* pMemory */) {
   if (m_type != NodeType::Map)
     return false;
 
-  for (node_map::iterator it = m_map.begin(); it != m_map.end(); ++it) {
-    if (it->first->is(key)) {
-      m_map.erase(it);
-      return true;
-    }
+  for (auto it = m_undefinedPairs.begin(); it != m_undefinedPairs.end();) {
+    auto jt = std::next(it);
+    if (it->first->is(key))
+      m_undefinedPairs.erase(it);
+    it = jt;
+  }
+
+  auto it =
+      std::find_if(m_map.begin(), m_map.end(),
+                   [&](std::pair<YAML::detail::node*, YAML::detail::node*> j) {
+                     return (j.first->is(key));
+                   });
+
+  if (it != m_map.end()) {
+    m_map.erase(it);
+    return true;
   }
 
   return false;
@@ -253,12 +280,13 @@ void node_data::reset_map() {
 }
 
 void node_data::insert_map_pair(node& key, node& value) {
-  m_map[&key] = &value;
+  m_map.emplace_back(&key, &value);
+
   if (!key.is_defined() || !value.is_defined())
-    m_undefinedPairs.push_back(kv_pair(&key, &value));
+    m_undefinedPairs.emplace_back(&key, &value);
 }
 
-void node_data::convert_to_map(shared_memory_holder pMemory) {
+void node_data::convert_to_map(const shared_memory_holder& pMemory) {
   switch (m_type) {
     case NodeType::Undefined:
     case NodeType::Null:
@@ -276,7 +304,7 @@ void node_data::convert_to_map(shared_memory_holder pMemory) {
   }
 }
 
-void node_data::convert_sequence_to_map(shared_memory_holder pMemory) {
+void node_data::convert_sequence_to_map(const shared_memory_holder& pMemory) {
   assert(m_type == NodeType::Sequence);
 
   reset_map();
@@ -292,5 +320,5 @@ void node_data::convert_sequence_to_map(shared_memory_holder pMemory) {
   reset_sequence();
   m_type = NodeType::Map;
 }
-}
-}
+}  // namespace detail
+}  // namespace YAML

src/nodebuilder.cpp

@@ -1,4 +1,3 @@
-#include <assert.h>
 #include <cassert>
 
 #include "nodebuilder.h"
@@ -11,11 +10,16 @@ namespace YAML {
 struct Mark;
 
 NodeBuilder::NodeBuilder()
-    : m_pMemory(new detail::memory_holder), m_pRoot(0), m_mapDepth(0) {
-  m_anchors.push_back(0);  // since the anchors start at 1
+    : m_pMemory(new detail::memory_holder),
+      m_pRoot(nullptr),
+      m_stack{},
+      m_anchors{},
+      m_keys{},
+      m_mapDepth(0) {
+  m_anchors.push_back(nullptr);  // since the anchors start at 1
 }
 
-NodeBuilder::~NodeBuilder() {}
+NodeBuilder::~NodeBuilder() = default;
 
 Node NodeBuilder::Root() {
   if (!m_pRoot)
@@ -28,8 +32,8 @@ void NodeBuilder::OnDocumentStart(const Mark&) {}
 
 void NodeBuilder::OnDocumentEnd() {}
 
-void NodeBuilder::OnNull(const Mark& /* mark */, anchor_t anchor) {
-  detail::node& node = Push(anchor);
+void NodeBuilder::OnNull(const Mark& mark, anchor_t anchor) {
+  detail::node& node = Push(mark, anchor);
   node.set_null();
   Pop();
 }
@@ -40,18 +44,17 @@ void NodeBuilder::OnAlias(const Mark& /* mark */, anchor_t anchor) {
   Pop();
 }
 
-void NodeBuilder::OnScalar(const Mark& /* mark */, const std::string& tag,
+void NodeBuilder::OnScalar(const Mark& mark, const std::string& tag,
                            anchor_t anchor, const std::string& value) {
-  detail::node& node = Push(anchor);
+  detail::node& node = Push(mark, anchor);
   node.set_scalar(value);
   node.set_tag(tag);
   Pop();
 }
 
-void NodeBuilder::OnSequenceStart(const Mark& /* mark */,
-                                  const std::string& tag, anchor_t anchor,
-                                  EmitterStyle::value style) {
-  detail::node& node = Push(anchor);
+void NodeBuilder::OnSequenceStart(const Mark& mark, const std::string& tag,
+                                  anchor_t anchor, EmitterStyle::value style) {
+  detail::node& node = Push(mark, anchor);
   node.set_tag(tag);
   node.set_type(NodeType::Sequence);
   node.set_style(style);
@@ -59,9 +62,9 @@ void NodeBuilder::OnSequenceStart(const Mark& /* mark */,
 
 void NodeBuilder::OnSequenceEnd() { Pop(); }
 
-void NodeBuilder::OnMapStart(const Mark& /* mark */, const std::string& tag,
+void NodeBuilder::OnMapStart(const Mark& mark, const std::string& tag,
                              anchor_t anchor, EmitterStyle::value style) {
-  detail::node& node = Push(anchor);
+  detail::node& node = Push(mark, anchor);
   node.set_type(NodeType::Map);
   node.set_tag(tag);
   node.set_style(style);
@@ -74,8 +77,9 @@ void NodeBuilder::OnMapEnd() {
   Pop();
 }
 
-detail::node& NodeBuilder::Push(anchor_t anchor) {
+detail::node& NodeBuilder::Push(const Mark& mark, anchor_t anchor) {
   detail::node& node = m_pMemory->create_node();
+  node.set_mark(mark);
   RegisterAnchor(anchor, node);
   Push(node);
   return node;
@@ -88,7 +92,7 @@ void NodeBuilder::Push(detail::node& node) {
 
   m_stack.push_back(&node);
   if (needsKey)
-    m_keys.push_back(PushedKey(&node, false));
+    m_keys.emplace_back(&node, false);
 }
 
 void NodeBuilder::Pop() {
@@ -127,4 +131,4 @@ void NodeBuilder::RegisterAnchor(anchor_t anchor, detail::node& node) {
     m_anchors.push_back(&node);
   }
 }
-}
+}  // namespace YAML

src/nodebuilder.h

@@ -27,28 +27,32 @@ class Node;
 class NodeBuilder : public EventHandler {
  public:
   NodeBuilder();
-  virtual ~NodeBuilder();
+  NodeBuilder(const NodeBuilder&) = delete;
+  NodeBuilder(NodeBuilder&&) = delete;
+  NodeBuilder& operator=(const NodeBuilder&) = delete;
+  NodeBuilder& operator=(NodeBuilder&&) = delete;
+  ~NodeBuilder() override;
 
   Node Root();
 
-  virtual void OnDocumentStart(const Mark& mark);
-  virtual void OnDocumentEnd();
+  void OnDocumentStart(const Mark& mark) override;
+  void OnDocumentEnd() override;
 
-  virtual void OnNull(const Mark& mark, anchor_t anchor);
-  virtual void OnAlias(const Mark& mark, anchor_t anchor);
-  virtual void OnScalar(const Mark& mark, const std::string& tag,
-                        anchor_t anchor, const std::string& value);
+  void OnNull(const Mark& mark, anchor_t anchor) override;
+  void OnAlias(const Mark& mark, anchor_t anchor) override;
+  void OnScalar(const Mark& mark, const std::string& tag,
+                        anchor_t anchor, const std::string& value) override;
 
-  virtual void OnSequenceStart(const Mark& mark, const std::string& tag,
-                               anchor_t anchor, EmitterStyle::value style);
-  virtual void OnSequenceEnd();
+  void OnSequenceStart(const Mark& mark, const std::string& tag,
+                               anchor_t anchor, EmitterStyle::value style) override;
+  void OnSequenceEnd() override;
 
-  virtual void OnMapStart(const Mark& mark, const std::string& tag,
-                          anchor_t anchor, EmitterStyle::value style);
-  virtual void OnMapEnd();
+  void OnMapStart(const Mark& mark, const std::string& tag,
+                          anchor_t anchor, EmitterStyle::value style) override;
+  void OnMapEnd() override;
 
  private:
-  detail::node& Push(anchor_t anchor);
+  detail::node& Push(const Mark& mark, anchor_t anchor);
   void Push(detail::node& node);
   void Pop();
   void RegisterAnchor(anchor_t anchor, detail::node& node);
@@ -57,14 +61,14 @@ class NodeBuilder : public EventHandler {
   detail::shared_memory_holder m_pMemory;
   detail::node* m_pRoot;
 
-  typedef std::vector<detail::node*> Nodes;
+  using Nodes = std::vector<detail::node *>;
   Nodes m_stack;
   Nodes m_anchors;
 
-  typedef std::pair<detail::node*, bool> PushedKey;
+  using PushedKey = std::pair<detail::node*, bool>;
   std::vector<PushedKey> m_keys;
   std::size_t m_mapDepth;
 };
-}
+}  // namespace YAML
 
 #endif  // NODE_NODEBUILDER_H_62B23520_7C8E_11DE_8A39_0800200C9A66

src/nodeevents.cpp

@@ -13,14 +13,14 @@ void NodeEvents::AliasManager::RegisterReference(const detail::node& node) {
 
 anchor_t NodeEvents::AliasManager::LookupAnchor(
     const detail::node& node) const {
-  AnchorByIdentity::const_iterator it = m_anchorByIdentity.find(node.ref());
+  auto it = m_anchorByIdentity.find(node.ref());
   if (it == m_anchorByIdentity.end())
     return 0;
   return it->second;
 }
 
 NodeEvents::NodeEvents(const Node& node)
-    : m_pMemory(node.m_pMemory), m_root(node.m_pNode) {
+    : m_pMemory(node.m_pMemory), m_root(node.m_pNode), m_refCount{} {
   if (m_root)
     Setup(*m_root);
 }
@@ -32,13 +32,12 @@ void NodeEvents::Setup(const detail::node& node) {
     return;
 
   if (node.type() == NodeType::Sequence) {
-    for (detail::const_node_iterator it = node.begin(); it != node.end(); ++it)
-      Setup(**it);
+    for (auto element : node)
+      Setup(*element);
   } else if (node.type() == NodeType::Map) {
-    for (detail::const_node_iterator it = node.begin(); it != node.end();
-         ++it) {
-      Setup(*it->first);
-      Setup(*it->second);
+    for (auto element : node) {
+      Setup(*element.first);
+      Setup(*element.second);
     }
   }
 }
@@ -77,17 +76,15 @@ void NodeEvents::Emit(const detail::node& node, EventHandler& handler,
       break;
     case NodeType::Sequence:
       handler.OnSequenceStart(Mark(), node.tag(), anchor, node.style());
-      for (detail::const_node_iterator it = node.begin(); it != node.end();
-           ++it)
-        Emit(**it, handler, am);
+      for (auto element : node)
+        Emit(*element, handler, am);
       handler.OnSequenceEnd();
       break;
     case NodeType::Map:
       handler.OnMapStart(Mark(), node.tag(), anchor, node.style());
-      for (detail::const_node_iterator it = node.begin(); it != node.end();
-           ++it) {
-        Emit(*it->first, handler, am);
-        Emit(*it->second, handler, am);
+      for (auto element : node) {
+        Emit(*element.first, handler, am);
+        Emit(*element.second, handler, am);
       }
       handler.OnMapEnd();
       break;
@@ -95,7 +92,7 @@ void NodeEvents::Emit(const detail::node& node, EventHandler& handler,
 }
 
 bool NodeEvents::IsAliased(const detail::node& node) const {
-  RefCount::const_iterator it = m_refCount.find(node.ref());
+  auto it = m_refCount.find(node.ref());
   return it != m_refCount.end() && it->second > 1;
 }
-}
+}  // namespace YAML

src/nodeevents.h

@@ -26,13 +26,17 @@ class Node;
 class NodeEvents {
  public:
   explicit NodeEvents(const Node& node);
+  NodeEvents(const NodeEvents&) = delete;
+  NodeEvents(NodeEvents&&) = delete;
+  NodeEvents& operator=(const NodeEvents&) = delete;
+  NodeEvents& operator=(NodeEvents&&) = delete;
 
   void Emit(EventHandler& handler);
 
  private:
   class AliasManager {
    public:
-    AliasManager() : m_curAnchor(0) {}
+    AliasManager() : m_anchorByIdentity{}, m_curAnchor(0) {}
 
     void RegisterReference(const detail::node& node);
     anchor_t LookupAnchor(const detail::node& node) const;
@@ -41,7 +45,7 @@ class NodeEvents {
     anchor_t _CreateNewAnchor() { return ++m_curAnchor; }
 
    private:
-    typedef std::map<const detail::node_ref*, anchor_t> AnchorByIdentity;
+    using AnchorByIdentity = std::map<const detail::node_ref*, anchor_t>;
     AnchorByIdentity m_anchorByIdentity;
 
     anchor_t m_curAnchor;
@@ -56,9 +60,9 @@ class NodeEvents {
   detail::shared_memory_holder m_pMemory;
   detail::node* m_root;
 
-  typedef std::map<const detail::node_ref*, int> RefCount;
+  using RefCount = std::map<const detail::node_ref*, int>;
   RefCount m_refCount;
 };
-}
+}  // namespace YAML
 
 #endif  // NODE_NODEEVENTS_H_62B23520_7C8E_11DE_8A39_0800200C9A66

src/null.cpp

@@ -2,4 +2,9 @@
 
 namespace YAML {
 _Null Null;
+
+bool IsNullString(const std::string& str) {
+  return str.empty() || str == "~" || str == "null" || str == "Null" ||
+         str == "NULL";
 }
+}  // namespace YAML

src/ostream_wrapper.cpp

@@ -7,16 +7,21 @@
 namespace YAML {
 ostream_wrapper::ostream_wrapper()
     : m_buffer(1, '\0'),
-      m_pStream(0),
+      m_pStream(nullptr),
       m_pos(0),
       m_row(0),
       m_col(0),
       m_comment(false) {}
 
 ostream_wrapper::ostream_wrapper(std::ostream& stream)
-    : m_pStream(&stream), m_pos(0), m_row(0), m_col(0), m_comment(false) {}
+    : m_buffer{},
+      m_pStream(&stream),
+      m_pos(0),
+      m_row(0),
+      m_col(0),
+      m_comment(false) {}
 
-ostream_wrapper::~ostream_wrapper() {}
+ostream_wrapper::~ostream_wrapper() = default;
 
 void ostream_wrapper::write(const std::string& str) {
   if (m_pStream) {
@@ -26,8 +31,8 @@ void ostream_wrapper::write(const std::string& str) {
     std::copy(str.begin(), str.end(), m_buffer.begin() + m_pos);
   }
 
-  for (std::size_t i = 0; i < str.size(); i++) {
-    update_pos(str[i]);
+  for (char ch : str) {
+    update_pos(ch);
   }
 }
 
@@ -54,4 +59,4 @@ void ostream_wrapper::update_pos(char ch) {
     m_comment = false;
   }
 }
-}
+}  // namespace YAML

src/parse.cpp

@@ -3,10 +3,10 @@
 #include <fstream>
 #include <sstream>
 
-#include "yaml-cpp/node/node.h"
-#include "yaml-cpp/node/impl.h"
-#include "yaml-cpp/parser.h"
 #include "nodebuilder.h"
+#include "yaml-cpp/node/impl.h"
+#include "yaml-cpp/node/node.h"
+#include "yaml-cpp/parser.h"
 
 namespace YAML {
 Node Load(const std::string& input) {
@@ -22,16 +22,18 @@ Node Load(const char* input) {
 Node Load(std::istream& input) {
   Parser parser(input);
   NodeBuilder builder;
-  if (!parser.HandleNextDocument(builder))
+  if (!parser.HandleNextDocument(builder)) {
     return Node();
+  }
 
   return builder.Root();
 }
 
 Node LoadFile(const std::string& filename) {
-  std::ifstream fin(filename.c_str());
-  if (!fin)
-    throw BadFile();
+  std::ifstream fin(filename);
+  if (!fin) {
+    throw BadFile(filename);
+  }
   return Load(fin);
 }
 
@@ -49,10 +51,11 @@ std::vector<Node> LoadAll(std::istream& input) {
   std::vector<Node> docs;
 
   Parser parser(input);
-  while (1) {
+  while (true) {
     NodeBuilder builder;
-    if (!parser.HandleNextDocument(builder))
+    if (!parser.HandleNextDocument(builder)) {
       break;
+    }
     docs.push_back(builder.Root());
   }
 
@@ -60,9 +63,10 @@ std::vector<Node> LoadAll(std::istream& input) {
 }
 
 std::vector<Node> LoadAllFromFile(const std::string& filename) {
-  std::ifstream fin(filename.c_str());
-  if (!fin)
-    throw BadFile();
+  std::ifstream fin(filename);
+  if (!fin) {
+    throw BadFile(filename);
+  }
   return LoadAll(fin);
 }
-}
+}  // namespace YAML

src/parser.cpp

@@ -11,55 +11,47 @@
 namespace YAML {
 class EventHandler;
 
-Parser::Parser() {}
+Parser::Parser() : m_pScanner{}, m_pDirectives{} {}
 
-Parser::Parser(std::istream& in) { Load(in); }
+Parser::Parser(std::istream& in) : Parser() { Load(in); }
 
-Parser::~Parser() {}
+Parser::~Parser() = default;
 
-Parser::operator bool() const {
-  return m_pScanner.get() && !m_pScanner->empty();
-}
+Parser::operator bool() const { return m_pScanner && !m_pScanner->empty(); }
 
 void Parser::Load(std::istream& in) {
   m_pScanner.reset(new Scanner(in));
   m_pDirectives.reset(new Directives);
 }
 
-// HandleNextDocument
-// . Handles the next document
-// . Throws a ParserException on error.
-// . Returns false if there are no more documents
 bool Parser::HandleNextDocument(EventHandler& eventHandler) {
-  if (!m_pScanner.get())
+  if (!m_pScanner)
     return false;
 
   ParseDirectives();
-  if (m_pScanner->empty())
+  if (m_pScanner->empty()) {
     return false;
+  }
 
   SingleDocParser sdp(*m_pScanner, *m_pDirectives);
   sdp.HandleDocument(eventHandler);
   return true;
 }
 
-// ParseDirectives
-// . Reads any directives that are next in the queue.
 void Parser::ParseDirectives() {
   bool readDirective = false;
 
-  while (1) {
-    if (m_pScanner->empty())
-      break;
-
+  while (!m_pScanner->empty()) {
     Token& token = m_pScanner->peek();
-    if (token.type != Token::DIRECTIVE)
+    if (token.type != Token::DIRECTIVE) {
       break;
+    }
 
     // we keep the directives from the last document if none are specified;
     // but if any directives are specific, then we reset them
-    if (!readDirective)
+    if (!readDirective) {
       m_pDirectives.reset(new Directives);
+    }
 
     readDirective = true;
     HandleDirective(token);
@@ -68,61 +60,60 @@ void Parser::ParseDirectives() {
 }
 
 void Parser::HandleDirective(const Token& token) {
-  if (token.value == "YAML")
+  if (token.value == "YAML") {
     HandleYamlDirective(token);
-  else if (token.value == "TAG")
+  } else if (token.value == "TAG") {
     HandleTagDirective(token);
+  }
 }
 
-// HandleYamlDirective
-// . Should be of the form 'major.minor' (like a version number)
 void Parser::HandleYamlDirective(const Token& token) {
-  if (token.params.size() != 1)
+  if (token.params.size() != 1) {
     throw ParserException(token.mark, ErrorMsg::YAML_DIRECTIVE_ARGS);
+  }
 
-  if (!m_pDirectives->version.isDefault)
+  if (!m_pDirectives->version.isDefault) {
     throw ParserException(token.mark, ErrorMsg::REPEATED_YAML_DIRECTIVE);
+  }
 
   std::stringstream str(token.params[0]);
   str >> m_pDirectives->version.major;
   str.get();
   str >> m_pDirectives->version.minor;
-  if (!str || str.peek() != EOF)
+  if (!str || str.peek() != EOF) {
     throw ParserException(
         token.mark, std::string(ErrorMsg::YAML_VERSION) + token.params[0]);
+  }
 
-  if (m_pDirectives->version.major > 1)
+  if (m_pDirectives->version.major > 1) {
     throw ParserException(token.mark, ErrorMsg::YAML_MAJOR_VERSION);
+  }
 
   m_pDirectives->version.isDefault = false;
   // TODO: warning on major == 1, minor > 2?
 }
 
-// HandleTagDirective
-// . Should be of the form 'handle prefix', where 'handle' is converted to
-// 'prefix' in the file.
 void Parser::HandleTagDirective(const Token& token) {
   if (token.params.size() != 2)
     throw ParserException(token.mark, ErrorMsg::TAG_DIRECTIVE_ARGS);
 
   const std::string& handle = token.params[0];
   const std::string& prefix = token.params[1];
-  if (m_pDirectives->tags.find(handle) != m_pDirectives->tags.end())
+  if (m_pDirectives->tags.find(handle) != m_pDirectives->tags.end()) {
     throw ParserException(token.mark, ErrorMsg::REPEATED_TAG_DIRECTIVE);
+  }
 
   m_pDirectives->tags[handle] = prefix;
 }
 
 void Parser::PrintTokens(std::ostream& out) {
-  if (!m_pScanner.get())
+  if (!m_pScanner) {
     return;
+  }
 
-  while (1) {
-    if (m_pScanner->empty())
-      break;
-
+  while (!m_pScanner->empty()) {
     out << m_pScanner->peek() << "\n";
     m_pScanner->pop();
   }
 }
-}
+}  // namespace YAML

src/ptr_stack.h

@@ -1,53 +0,0 @@
-#ifndef PTR_STACK_H_62B23520_7C8E_11DE_8A39_0800200C9A66
-#define PTR_STACK_H_62B23520_7C8E_11DE_8A39_0800200C9A66
-
-#if defined(_MSC_VER) ||                                            \
-    (defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || \
-     (__GNUC__ >= 4))  // GCC supports "pragma once" correctly since 3.4
-#pragma once
-#endif
-
-#include <cstddef>
-#include <cstdlib>
-#include <memory>
-#include <vector>
-
-#include "yaml-cpp/noncopyable.h"
-
-template <typename T>
-class ptr_stack : private YAML::noncopyable {
- public:
-  ptr_stack() {}
-  ~ptr_stack() { clear(); }
-
-  void clear() {
-    for (std::size_t i = 0; i < m_data.size(); i++)
-      delete m_data[i];
-    m_data.clear();
-  }
-
-  std::size_t size() const { return m_data.size(); }
-  bool empty() const { return m_data.empty(); }
-
-  void push(std::auto_ptr<T> t) {
-    m_data.push_back(NULL);
-    m_data.back() = t.release();
-  }
-  std::auto_ptr<T> pop() {
-    std::auto_ptr<T> t(m_data.back());
-    m_data.pop_back();
-    return t;
-  }
-  T& top() { return *m_data.back(); }
-  const T& top() const { return *m_data.back(); }
-
-  T& top(std::ptrdiff_t diff) { return **(m_data.end() - 1 + diff); }
-  const T& top(std::ptrdiff_t diff) const {
-    return **(m_data.end() - 1 + diff);
-  }
-
- private:
-  std::vector<T*> m_data;
-};
-
-#endif  // PTR_STACK_H_62B23520_7C8E_11DE_8A39_0800200C9A66

src/ptr_vector.h

@@ -12,38 +12,34 @@
 #include <memory>
 #include <vector>
 
-#include "yaml-cpp/noncopyable.h"
-
 namespace YAML {
 
+// TODO: This class is no longer needed
 template <typename T>
-class ptr_vector : private YAML::noncopyable {
+class ptr_vector {
  public:
-  ptr_vector() {}
-  ~ptr_vector() { clear(); }
+  ptr_vector() : m_data{} {}
+  ptr_vector(const ptr_vector&) = delete;
+  ptr_vector(ptr_vector&&) = default;
+  ptr_vector& operator=(const ptr_vector&) = delete;
+  ptr_vector& operator=(ptr_vector&&) = default;
 
-  void clear() {
-    for (std::size_t i = 0; i < m_data.size(); i++)
-      delete m_data[i];
-    m_data.clear();
-  }
+  void clear() { m_data.clear(); }
 
   std::size_t size() const { return m_data.size(); }
   bool empty() const { return m_data.empty(); }
 
-  void push_back(std::auto_ptr<T> t) {
-    m_data.push_back(NULL);
-    m_data.back() = t.release();
-  }
+  void push_back(std::unique_ptr<T>&& t) { m_data.push_back(std::move(t)); }
   T& operator[](std::size_t i) { return *m_data[i]; }
   const T& operator[](std::size_t i) const { return *m_data[i]; }
 
-  T& back() { return *m_data.back(); }
-  const T& back() const { return *m_data.back(); }
+  T& back() { return *(m_data.back().get()); }
+
+  const T& back() const { return *(m_data.back().get()); }
 
  private:
-  std::vector<T*> m_data;
+  std::vector<std::unique_ptr<T>> m_data;
 };
-}
+}  // namespace YAML
 
 #endif  // PTR_VECTOR_H_62B23520_7C8E_11DE_8A39_0800200C9A66

src/regex_yaml.cpp

@@ -2,18 +2,16 @@
 
 namespace YAML {
 // constructors
-RegEx::RegEx() : m_op(REGEX_EMPTY) {}
 
-RegEx::RegEx(REGEX_OP op) : m_op(op) {}
+RegEx::RegEx(REGEX_OP op) : m_op(op), m_a(0), m_z(0), m_params{} {}
+RegEx::RegEx() : RegEx(REGEX_EMPTY) {}
 
-RegEx::RegEx(char ch) : m_op(REGEX_MATCH), m_a(ch) {}
+RegEx::RegEx(char ch) : m_op(REGEX_MATCH), m_a(ch), m_z(0), m_params{} {}
 
-RegEx::RegEx(char a, char z) : m_op(REGEX_RANGE), m_a(a), m_z(z) {}
+RegEx::RegEx(char a, char z) : m_op(REGEX_RANGE), m_a(a), m_z(z), m_params{} {}
 
-RegEx::RegEx(const std::string& str, REGEX_OP op) : m_op(op) {
-  for (std::size_t i = 0; i < str.size(); i++)
-    m_params.push_back(RegEx(str[i]));
-}
+RegEx::RegEx(const std::string& str, REGEX_OP op)
+    : m_op(op), m_a(0), m_z(0), m_params(str.begin(), str.end()) {}
 
 // combination constructors
 RegEx operator!(const RegEx& ex) {
@@ -22,14 +20,14 @@ RegEx operator!(const RegEx& ex) {
   return ret;
 }
 
-RegEx operator||(const RegEx& ex1, const RegEx& ex2) {
+RegEx operator|(const RegEx& ex1, const RegEx& ex2) {
   RegEx ret(REGEX_OR);
   ret.m_params.push_back(ex1);
   ret.m_params.push_back(ex2);
   return ret;
 }
 
-RegEx operator&&(const RegEx& ex1, const RegEx& ex2) {
+RegEx operator&(const RegEx& ex1, const RegEx& ex2) {
   RegEx ret(REGEX_AND);
   ret.m_params.push_back(ex1);
   ret.m_params.push_back(ex2);
@@ -42,4 +40,4 @@ RegEx operator+(const RegEx& ex1, const RegEx& ex2) {
   ret.m_params.push_back(ex2);
   return ret;
 }
-}
+}  // namespace YAML

src/regex_yaml.h

@@ -10,6 +10,8 @@
 #include <string>
 #include <vector>
 
+#include "yaml-cpp/dll.h"
+
 namespace YAML {
 class Stream;
 
@@ -26,18 +28,18 @@ enum REGEX_OP {
 // simplified regular expressions
 // . Only straightforward matches (no repeated characters)
 // . Only matches from start of string
-class RegEx {
+class YAML_CPP_API RegEx {
  public:
   RegEx();
-  RegEx(char ch);
+  explicit RegEx(char ch);
   RegEx(char a, char z);
   RegEx(const std::string& str, REGEX_OP op = REGEX_SEQ);
-  ~RegEx() {}
+  ~RegEx() = default;
 
-  friend RegEx operator!(const RegEx& ex);
-  friend RegEx operator||(const RegEx& ex1, const RegEx& ex2);
-  friend RegEx operator&&(const RegEx& ex1, const RegEx& ex2);
-  friend RegEx operator+(const RegEx& ex1, const RegEx& ex2);
+  friend YAML_CPP_API RegEx operator!(const RegEx& ex);
+  friend YAML_CPP_API RegEx operator|(const RegEx& ex1, const RegEx& ex2);
+  friend YAML_CPP_API RegEx operator&(const RegEx& ex1, const RegEx& ex2);
+  friend YAML_CPP_API RegEx operator+(const RegEx& ex1, const RegEx& ex2);
 
   bool Matches(char ch) const;
   bool Matches(const std::string& str) const;
@@ -51,7 +53,7 @@ class RegEx {
   int Match(const Source& source) const;
 
  private:
-  RegEx(REGEX_OP op);
+  explicit RegEx(REGEX_OP op);
 
   template <typename Source>
   bool IsValidSource(const Source& source) const;
@@ -75,10 +77,11 @@ class RegEx {
 
  private:
   REGEX_OP m_op;
-  char m_a, m_z;
+  char m_a{};
+  char m_z{};
   std::vector<RegEx> m_params;
 };
-}
+}  // namespace YAML
 
 #include "regeximpl.h"
 

src/regeximpl.h

@@ -8,8 +8,8 @@
 #endif
 
 #include "stream.h"
-#include "stringsource.h"
 #include "streamcharsource.h"
+#include "stringsource.h"
 
 namespace YAML {
 // query matches
@@ -106,9 +106,8 @@ inline int RegEx::MatchOpEmpty(const Source& source) const {
 template <>
 inline int RegEx::MatchOpEmpty<StringCharSource>(
     const StringCharSource& source) const {
-  return !source
-             ? 0
-             : -1;  // the empty regex only is successful on the empty string
+  return !source ? 0 : -1;  // the empty regex only is successful on the empty
+                            // string
 }
 
 // MatchOperator
@@ -130,8 +129,8 @@ inline int RegEx::MatchOpRange(const Source& source) const {
 // OrOperator
 template <typename Source>
 inline int RegEx::MatchOpOr(const Source& source) const {
-  for (std::size_t i = 0; i < m_params.size(); i++) {
-    int n = m_params[i].MatchUnchecked(source);
+  for (const RegEx& param : m_params) {
+    int n = param.MatchUnchecked(source);
     if (n >= 0)
       return n;
   }
@@ -169,11 +168,11 @@ inline int RegEx::MatchOpNot(const Source& source) const {
 template <typename Source>
 inline int RegEx::MatchOpSeq(const Source& source) const {
   int offset = 0;
-  for (std::size_t i = 0; i < m_params.size(); i++) {
-    int n = m_params[i].Match(source + offset);  // note Match, not
-                                                 // MatchUnchecked because we
-                                                 // need to check validity after
-                                                 // the offset
+  for (const RegEx& param : m_params) {
+    int n = param.Match(source + offset);  // note Match, not
+                                           // MatchUnchecked because we
+                                           // need to check validity after
+                                           // the offset
     if (n == -1)
       return -1;
     offset += n;
@@ -181,6 +180,6 @@ inline int RegEx::MatchOpSeq(const Source& source) const {
 
   return offset;
 }
-}
+}  // namespace YAML
 
 #endif  // REGEXIMPL_H_62B23520_7C8E_11DE_8A39_0800200C9A66

src/scanner.cpp

@@ -9,30 +9,29 @@
 namespace YAML {
 Scanner::Scanner(std::istream& in)
     : INPUT(in),
+      m_tokens{},
       m_startedStream(false),
       m_endedStream(false),
       m_simpleKeyAllowed(false),
-      m_canBeJSONFlow(false) {}
+      m_canBeJSONFlow(false),
+      m_simpleKeys{},
+      m_indents{},
+      m_indentRefs{},
+      m_flows{} {}
 
-Scanner::~Scanner() {}
+Scanner::~Scanner() = default;
 
-// empty
-// . Returns true if there are no more tokens to be read
 bool Scanner::empty() {
   EnsureTokensInQueue();
   return m_tokens.empty();
 }
 
-// pop
-// . Simply removes the next token on the queue.
 void Scanner::pop() {
   EnsureTokensInQueue();
   if (!m_tokens.empty())
     m_tokens.pop();
 }
 
-// peek
-// . Returns (but does not remove) the next token on the queue.
 Token& Scanner::peek() {
   EnsureTokensInQueue();
   assert(!m_tokens.empty());  // should we be asserting here? I mean, we really
@@ -49,21 +48,17 @@ Token& Scanner::peek() {
   return m_tokens.front();
 }
 
-// mark
-// . Returns the current mark in the stream
 Mark Scanner::mark() const { return INPUT.mark(); }
 
-// EnsureTokensInQueue
-// . Scan until there's a valid token at the front of the queue,
-//   or we're sure the queue is empty.
 void Scanner::EnsureTokensInQueue() {
-  while (1) {
+  while (true) {
     if (!m_tokens.empty()) {
       Token& token = m_tokens.front();
 
       // if this guy's valid, then we're done
-      if (token.status == Token::VALID)
+      if (token.status == Token::VALID) {
         return;
+      }
 
       // here's where we clean up the impossible tokens
       if (token.status == Token::INVALID) {
@@ -75,25 +70,25 @@ void Scanner::EnsureTokensInQueue() {
     }
 
     // no token? maybe we've actually finished
-    if (m_endedStream)
+    if (m_endedStream) {
       return;
+    }
 
     // no? then scan...
     ScanNextToken();
   }
 }
 
-// ScanNextToken
-// . The main scanning function; here we branch out and
-//   scan whatever the next token should be.
 void Scanner::ScanNextToken() {
-  if (m_endedStream)
+  if (m_endedStream) {
     return;
+  }
 
-  if (!m_startedStream)
+  if (!m_startedStream) {
     return StartStream();
+  }
 
-  // get rid of whitespace, etc. (in between tokens it should be irrelevent)
+  // get rid of whitespace, etc. (in between tokens it should be irrelevant)
   ScanToNextToken();
 
   // maybe need to end some blocks
@@ -104,85 +99,102 @@ void Scanner::ScanNextToken() {
   // *****
 
   // end of stream
-  if (!INPUT)
+  if (!INPUT) {
     return EndStream();
+  }
 
-  if (INPUT.column() == 0 && INPUT.peek() == Keys::Directive)
+  if (INPUT.column() == 0 && INPUT.peek() == Keys::Directive) {
     return ScanDirective();
+  }
 
   // document token
-  if (INPUT.column() == 0 && Exp::DocStart().Matches(INPUT))
+  if (INPUT.column() == 0 && Exp::DocStart().Matches(INPUT)) {
     return ScanDocStart();
+  }
 
-  if (INPUT.column() == 0 && Exp::DocEnd().Matches(INPUT))
+  if (INPUT.column() == 0 && Exp::DocEnd().Matches(INPUT)) {
     return ScanDocEnd();
+  }
 
   // flow start/end/entry
-  if (INPUT.peek() == Keys::FlowSeqStart || INPUT.peek() == Keys::FlowMapStart)
+  if (INPUT.peek() == Keys::FlowSeqStart ||
+      INPUT.peek() == Keys::FlowMapStart) {
     return ScanFlowStart();
+  }
 
-  if (INPUT.peek() == Keys::FlowSeqEnd || INPUT.peek() == Keys::FlowMapEnd)
+  if (INPUT.peek() == Keys::FlowSeqEnd || INPUT.peek() == Keys::FlowMapEnd) {
     return ScanFlowEnd();
+  }
 
-  if (INPUT.peek() == Keys::FlowEntry)
+  if (INPUT.peek() == Keys::FlowEntry) {
     return ScanFlowEntry();
+  }
 
   // block/map stuff
-  if (Exp::BlockEntry().Matches(INPUT))
+  if (Exp::BlockEntry().Matches(INPUT)) {
     return ScanBlockEntry();
+  }
 
-  if ((InBlockContext() ? Exp::Key() : Exp::KeyInFlow()).Matches(INPUT))
+  if ((InBlockContext() ? Exp::Key() : Exp::KeyInFlow()).Matches(INPUT)) {
     return ScanKey();
+  }
 
-  if (GetValueRegex().Matches(INPUT))
+  if (GetValueRegex().Matches(INPUT)) {
     return ScanValue();
+  }
 
   // alias/anchor
-  if (INPUT.peek() == Keys::Alias || INPUT.peek() == Keys::Anchor)
+  if (INPUT.peek() == Keys::Alias || INPUT.peek() == Keys::Anchor) {
     return ScanAnchorOrAlias();
+  }
 
   // tag
-  if (INPUT.peek() == Keys::Tag)
+  if (INPUT.peek() == Keys::Tag) {
     return ScanTag();
+  }
 
   // special scalars
   if (InBlockContext() && (INPUT.peek() == Keys::LiteralScalar ||
-                           INPUT.peek() == Keys::FoldedScalar))
+                           INPUT.peek() == Keys::FoldedScalar)) {
     return ScanBlockScalar();
+  }
 
-  if (INPUT.peek() == '\'' || INPUT.peek() == '\"')
+  if (INPUT.peek() == '\'' || INPUT.peek() == '\"') {
     return ScanQuotedScalar();
+  }
 
   // plain scalars
   if ((InBlockContext() ? Exp::PlainScalar() : Exp::PlainScalarInFlow())
-          .Matches(INPUT))
+          .Matches(INPUT)) {
     return ScanPlainScalar();
+  }
 
   // don't know what it is!
   throw ParserException(INPUT.mark(), ErrorMsg::UNKNOWN_TOKEN);
 }
 
-// ScanToNextToken
-// . Eats input until we reach the next token-like thing.
 void Scanner::ScanToNextToken() {
-  while (1) {
+  while (true) {
     // first eat whitespace
     while (INPUT && IsWhitespaceToBeEaten(INPUT.peek())) {
-      if (InBlockContext() && Exp::Tab().Matches(INPUT))
+      if (InBlockContext() && Exp::Tab().Matches(INPUT)) {
         m_simpleKeyAllowed = false;
+      }
       INPUT.eat(1);
     }
 
     // then eat a comment
     if (Exp::Comment().Matches(INPUT)) {
       // eat until line break
-      while (INPUT && !Exp::Break().Matches(INPUT))
+      while (INPUT && !Exp::Break().Matches(INPUT)) {
         INPUT.eat(1);
+      }
     }
 
     // if it's NOT a line break, then we're done!
-    if (!Exp::Break().Matches(INPUT))
+    if (!Exp::Break().Matches(INPUT)) {
       break;
+    }
 
     // otherwise, let's eat the line break and keep going
     int n = Exp::Break().Match(INPUT);
@@ -192,8 +204,9 @@ void Scanner::ScanToNextToken() {
     InvalidateSimpleKey();
 
     // new line - we may be able to accept a simple key now
-    if (InBlockContext())
+    if (InBlockContext()) {
       m_simpleKeyAllowed = true;
+    }
   }
 }
 
@@ -210,40 +223,39 @@ void Scanner::ScanToNextToken() {
 //   that they can't contribute to indentation, so once you've seen a tab in a
 //   line, you can't start a simple key
 bool Scanner::IsWhitespaceToBeEaten(char ch) {
-  if (ch == ' ')
+  if (ch == ' ') {
     return true;
+  }
 
-  if (ch == '\t')
+  if (ch == '\t') {
     return true;
+  }
 
   return false;
 }
 
-// GetValueRegex
-// . Get the appropriate regex to check if it's a value token
 const RegEx& Scanner::GetValueRegex() const {
-  if (InBlockContext())
+  if (InBlockContext()) {
     return Exp::Value();
+  }
 
   return m_canBeJSONFlow ? Exp::ValueInJSONFlow() : Exp::ValueInFlow();
 }
 
-// StartStream
-// . Set the initial conditions for starting a stream.
 void Scanner::StartStream() {
   m_startedStream = true;
   m_simpleKeyAllowed = true;
-  std::auto_ptr<IndentMarker> pIndent(new IndentMarker(-1, IndentMarker::NONE));
-  m_indentRefs.push_back(pIndent);
+  std::unique_ptr<IndentMarker> pIndent(
+      new IndentMarker(-1, IndentMarker::NONE));
+  m_indentRefs.push_back(std::move(pIndent));
   m_indents.push(&m_indentRefs.back());
 }
 
-// EndStream
-// . Close out the stream, finish up, etc.
 void Scanner::EndStream() {
   // force newline
-  if (INPUT.column() > 0)
+  if (INPUT.column() > 0) {
     INPUT.ResetColumn();
+  }
 
   PopAllIndents();
   PopAllSimpleKeys();
@@ -271,84 +283,80 @@ Token::TYPE Scanner::GetStartTokenFor(IndentMarker::INDENT_TYPE type) const {
   throw std::runtime_error("yaml-cpp: internal error, invalid indent type");
 }
 
-// PushIndentTo
-// . Pushes an indentation onto the stack, and enqueues the
-//   proper token (sequence start or mapping start).
-// . Returns the indent marker it generates (if any).
 Scanner::IndentMarker* Scanner::PushIndentTo(int column,
                                              IndentMarker::INDENT_TYPE type) {
   // are we in flow?
-  if (InFlowContext())
-    return 0;
+  if (InFlowContext()) {
+    return nullptr;
+  }
 
-  std::auto_ptr<IndentMarker> pIndent(new IndentMarker(column, type));
+  std::unique_ptr<IndentMarker> pIndent(new IndentMarker(column, type));
   IndentMarker& indent = *pIndent;
   const IndentMarker& lastIndent = *m_indents.top();
 
   // is this actually an indentation?
-  if (indent.column < lastIndent.column)
-    return 0;
+  if (indent.column < lastIndent.column) {
+    return nullptr;
+  }
   if (indent.column == lastIndent.column &&
       !(indent.type == IndentMarker::SEQ &&
-        lastIndent.type == IndentMarker::MAP))
-    return 0;
+        lastIndent.type == IndentMarker::MAP)) {
+    return nullptr;
+  }
 
   // push a start token
   indent.pStartToken = PushToken(GetStartTokenFor(type));
 
   // and then the indent
   m_indents.push(&indent);
-  m_indentRefs.push_back(pIndent);
+  m_indentRefs.push_back(std::move(pIndent));
   return &m_indentRefs.back();
 }
 
-// PopIndentToHere
-// . Pops indentations off the stack until we reach the current indentation
-// level,
-//   and enqueues the proper token each time.
-// . Then pops all invalid indentations off.
 void Scanner::PopIndentToHere() {
   // are we in flow?
-  if (InFlowContext())
+  if (InFlowContext()) {
     return;
+  }
 
   // now pop away
   while (!m_indents.empty()) {
     const IndentMarker& indent = *m_indents.top();
-    if (indent.column < INPUT.column())
+    if (indent.column < INPUT.column()) {
       break;
+    }
     if (indent.column == INPUT.column() &&
         !(indent.type == IndentMarker::SEQ &&
-          !Exp::BlockEntry().Matches(INPUT)))
+          !Exp::BlockEntry().Matches(INPUT))) {
       break;
+    }
 
     PopIndent();
   }
 
-  while (!m_indents.empty() && m_indents.top()->status == IndentMarker::INVALID)
+  while (!m_indents.empty() &&
+         m_indents.top()->status == IndentMarker::INVALID) {
     PopIndent();
+  }
 }
 
-// PopAllIndents
-// . Pops all indentations (except for the base empty one) off the stack,
-//   and enqueues the proper token each time.
 void Scanner::PopAllIndents() {
   // are we in flow?
-  if (InFlowContext())
+  if (InFlowContext()) {
     return;
+  }
 
   // now pop away
   while (!m_indents.empty()) {
     const IndentMarker& indent = *m_indents.top();
-    if (indent.type == IndentMarker::NONE)
+    if (indent.type == IndentMarker::NONE) {
       break;
+    }
 
     PopIndent();
   }
 }
 
-// PopIndent
-// . Pops a single indent, pushing the proper token
 void Scanner::PopIndent() {
   const IndentMarker& indent = *m_indents.top();
   m_indents.pop();
@@ -358,23 +366,20 @@ void Scanner::PopIndent() {
     return;
   }
 
-  if (indent.type == IndentMarker::SEQ)
+  if (indent.type == IndentMarker::SEQ) {
     m_tokens.push(Token(Token::BLOCK_SEQ_END, INPUT.mark()));
-  else if (indent.type == IndentMarker::MAP)
+  } else if (indent.type == IndentMarker::MAP) {
     m_tokens.push(Token(Token::BLOCK_MAP_END, INPUT.mark()));
+  }
 }
 
-// GetTopIndent
 int Scanner::GetTopIndent() const {
-  if (m_indents.empty())
+  if (m_indents.empty()) {
     return 0;
+  }
   return m_indents.top()->column;
 }
 
-// ThrowParserException
-// . Throws a ParserException with the current token location
-//   (if available).
-// . Does not parse any more tokens.
 void Scanner::ThrowParserException(const std::string& msg) const {
   Mark mark = Mark::null_mark();
   if (!m_tokens.empty()) {
@@ -383,4 +388,4 @@ void Scanner::ThrowParserException(const std::string& msg) const {
   }
   throw ParserException(mark, msg);
 }
-}
+}  // namespace YAML

src/scanner.h

@@ -24,15 +24,24 @@ namespace YAML {
 class Node;
 class RegEx;
 
+/**
+ * A scanner transforms a stream of characters into a stream of tokens.
+ */
 class Scanner {
  public:
-  Scanner(std::istream &in);
+  explicit Scanner(std::istream &in);
   ~Scanner();
 
-  // token queue management (hopefully this looks kinda stl-ish)
+  /** Returns true if there are no more tokens to be read. */
   bool empty();
+
+  /** Removes the next token in the queue. */
   void pop();
+
+  /** Returns, but does not remove, the next token in the queue. */
   Token &peek();
+
+  /** Returns the current mark in the input stream. */
   Mark mark() const;
 
  private:
@@ -40,7 +49,7 @@ class Scanner {
     enum INDENT_TYPE { MAP, SEQ, NONE };
     enum STATUS { VALID, INVALID, UNKNOWN };
     IndentMarker(int column_, INDENT_TYPE type_)
-        : column(column_), type(type_), status(VALID), pStartToken(0) {}
+        : column(column_), type(type_), status(VALID), pStartToken(nullptr) {}
 
     int column;
     INDENT_TYPE type;
@@ -52,11 +61,29 @@ class Scanner {
 
  private:
   // scanning
+
+  /**
+   * Scans until there's a valid token at the front of the queue, or the queue
+   * is empty. The state can be checked by {@link #empty}, and the next token
+   * retrieved by {@link #peek}.
+   */
   void EnsureTokensInQueue();
+
+  /**
+   * The main scanning function; this method branches out to scan whatever the
+   * next token should be.
+   */
   void ScanNextToken();
+
+  /** Eats the input stream until it reaches the next token-like thing. */
   void ScanToNextToken();
+
+  /** Sets the initial conditions for starting a stream. */
   void StartStream();
+
+  /** Closes out the stream, finish up, etc. */
   void EndStream();
+
   Token *PushToken(Token::TYPE type);
 
   bool InFlowContext() const { return !m_flows.empty(); }
@@ -64,9 +91,29 @@ class Scanner {
   std::size_t GetFlowLevel() const { return m_flows.size(); }
 
   Token::TYPE GetStartTokenFor(IndentMarker::INDENT_TYPE type) const;
+
+  /**
+   * Pushes an indentation onto the stack, and enqueues the proper token
+   * (sequence start or mapping start).
+   *
+   * @return the indent marker it generates (if any).
+   */
   IndentMarker *PushIndentTo(int column, IndentMarker::INDENT_TYPE type);
+
+  /**
+   * Pops indentations off the stack until it reaches the current indentation
+   * level, and enqueues the proper token each time. Then pops all invalid
+   * indentations off.
+   */
   void PopIndentToHere();
+
+  /**
+   * Pops all indentations (except for the base empty one) off the stack, and
+   * enqueues the proper token each time.
+   */
   void PopAllIndents();
+
+  /** Pops a single indent, pushing the proper token. */
   void PopIndent();
   int GetTopIndent() const;
 
@@ -78,9 +125,17 @@ class Scanner {
   bool VerifySimpleKey();
   void PopAllSimpleKeys();
 
+  /**
+   * Throws a ParserException with the current token location (if available),
+   * and does not parse any more tokens.
+   */
   void ThrowParserException(const std::string &msg) const;
 
   bool IsWhitespaceToBeEaten(char ch);
+
+  /**
+   * Returns the appropriate regex to check if the next token is a value token.
+   */
   const RegEx &GetValueRegex() const;
 
   struct SimpleKey {

src/scanscalar.cpp

@@ -28,22 +28,29 @@ std::string ScanScalar(Stream& INPUT, ScanScalarParams& params) {
   std::string scalar;
   params.leadingSpaces = false;
 
+  if (!params.end) {
+    params.end = &Exp::Empty();
+  }
+
   while (INPUT) {
     // ********************************
     // Phase #1: scan until line ending
 
     std::size_t lastNonWhitespaceChar = scalar.size();
     bool escapedNewline = false;
-    while (!params.end.Matches(INPUT) && !Exp::Break().Matches(INPUT)) {
-      if (!INPUT)
+    while (!params.end->Matches(INPUT) && !Exp::Break().Matches(INPUT)) {
+      if (!INPUT) {
         break;
+      }
 
       // document indicator?
       if (INPUT.column() == 0 && Exp::DocIndicator().Matches(INPUT)) {
-        if (params.onDocIndicator == BREAK)
+        if (params.onDocIndicator == BREAK) {
           break;
-        else if (params.onDocIndicator == THROW)
+        }
+        if (params.onDocIndicator == THROW) {
           throw ParserException(INPUT.mark(), ErrorMsg::DOC_IN_SCALAR);
+        }
       }
 
       foundNonEmptyLine = true;
@@ -70,27 +77,31 @@ std::string ScanScalar(Stream& INPUT, ScanScalarParams& params) {
       // otherwise, just add the damn character
       char ch = INPUT.get();
       scalar += ch;
-      if (ch != ' ' && ch != '\t')
+      if (ch != ' ' && ch != '\t') {
         lastNonWhitespaceChar = scalar.size();
+      }
     }
 
     // eof? if we're looking to eat something, then we throw
     if (!INPUT) {
-      if (params.eatEnd)
+      if (params.eatEnd) {
         throw ParserException(INPUT.mark(), ErrorMsg::EOF_IN_SCALAR);
+      }
       break;
     }
 
     // doc indicator?
     if (params.onDocIndicator == BREAK && INPUT.column() == 0 &&
-        Exp::DocIndicator().Matches(INPUT))
+        Exp::DocIndicator().Matches(INPUT)) {
       break;
+    }
 
     // are we done via character match?
-    int n = params.end.Match(INPUT);
+    int n = params.end->Match(INPUT);
     if (n >= 0) {
-      if (params.eatEnd)
+      if (params.eatEnd) {
         INPUT.eat(n);
+      }
       break;
     }
 
@@ -107,23 +118,33 @@ std::string ScanScalar(Stream& INPUT, ScanScalarParams& params) {
     // Phase #3: scan initial spaces
 
     // first the required indentation
-    while (INPUT.peek() == ' ' && (INPUT.column() < params.indent ||
-                                   (params.detectIndent && !foundNonEmptyLine)))
+    while (INPUT.peek() == ' ' &&
+           (INPUT.column() < params.indent ||
+            (params.detectIndent && !foundNonEmptyLine)) &&
+           !params.end->Matches(INPUT)) {
       INPUT.eat(1);
+    }
 
     // update indent if we're auto-detecting
-    if (params.detectIndent && !foundNonEmptyLine)
+    if (params.detectIndent && !foundNonEmptyLine) {
       params.indent = std::max(params.indent, INPUT.column());
+    }
 
     // and then the rest of the whitespace
     while (Exp::Blank().Matches(INPUT)) {
       // we check for tabs that masquerade as indentation
       if (INPUT.peek() == '\t' && INPUT.column() < params.indent &&
-          params.onTabInIndentation == THROW)
+          params.onTabInIndentation == THROW) {
         throw ParserException(INPUT.mark(), ErrorMsg::TAB_IN_INDENTATION);
+      }
 
-      if (!params.eatLeadingWhitespace)
+      if (!params.eatLeadingWhitespace) {
         break;
+      }
+
+      if (params.end->Matches(INPUT)) {
+        break;
+      }
 
       INPUT.eat(1);
     }
@@ -143,26 +164,29 @@ std::string ScanScalar(Stream& INPUT, ScanScalarParams& params) {
           break;
         case FOLD_BLOCK:
           if (!emptyLine && !nextEmptyLine && !moreIndented &&
-              !nextMoreIndented && INPUT.column() >= params.indent)
+              !nextMoreIndented && INPUT.column() >= params.indent) {
             scalar += " ";
-          else if (nextEmptyLine)
+          } else if (nextEmptyLine) {
             foldedNewlineCount++;
-          else
+          } else {
             scalar += "\n";
+          }
 
           if (!nextEmptyLine && foldedNewlineCount > 0) {
             scalar += std::string(foldedNewlineCount - 1, '\n');
             if (foldedNewlineStartedMoreIndented ||
-                nextMoreIndented | !foundNonEmptyLine)
+                nextMoreIndented | !foundNonEmptyLine) {
               scalar += "\n";
+            }
             foldedNewlineCount = 0;
           }
           break;
         case FOLD_FLOW:
-          if (nextEmptyLine)
+          if (nextEmptyLine) {
             scalar += "\n";
-          else if (!emptyLine && !nextEmptyLine && !escapedNewline)
+          } else if (!emptyLine && !escapedNewline) {
             scalar += " ";
+          }
           break;
       }
     }
@@ -180,37 +204,43 @@ std::string ScanScalar(Stream& INPUT, ScanScalarParams& params) {
 
   // post-processing
   if (params.trimTrailingSpaces) {
-    std::size_t pos = scalar.find_last_not_of(' ');
+    std::size_t pos = scalar.find_last_not_of(" \t");
     if (lastEscapedChar != std::string::npos) {
-      if (pos < lastEscapedChar || pos == std::string::npos)
+      if (pos < lastEscapedChar || pos == std::string::npos) {
         pos = lastEscapedChar;
+      }
     }
-    if (pos < scalar.size())
+    if (pos < scalar.size()) {
       scalar.erase(pos + 1);
+    }
   }
 
   switch (params.chomp) {
     case CLIP: {
       std::size_t pos = scalar.find_last_not_of('\n');
       if (lastEscapedChar != std::string::npos) {
-        if (pos < lastEscapedChar || pos == std::string::npos)
+        if (pos < lastEscapedChar || pos == std::string::npos) {
           pos = lastEscapedChar;
+        }
       }
-      if (pos == std::string::npos)
+      if (pos == std::string::npos) {
         scalar.erase();
-      else if (pos + 1 < scalar.size())
+      } else if (pos + 1 < scalar.size()) {
         scalar.erase(pos + 2);
+      }
     } break;
     case STRIP: {
       std::size_t pos = scalar.find_last_not_of('\n');
       if (lastEscapedChar != std::string::npos) {
-        if (pos < lastEscapedChar || pos == std::string::npos)
+        if (pos < lastEscapedChar || pos == std::string::npos) {
           pos = lastEscapedChar;
+        }
       }
-      if (pos == std::string::npos)
+      if (pos == std::string::npos) {
         scalar.erase();
-      else if (pos < scalar.size())
+      } else if (pos < scalar.size()) {
         scalar.erase(pos + 1);
+      }
     } break;
     default:
       break;
@@ -218,4 +248,4 @@ std::string ScanScalar(Stream& INPUT, ScanScalarParams& params) {
 
   return scalar;
 }
-}
+}  // namespace YAML

src/scanscalar.h

@@ -19,7 +19,8 @@ enum FOLD { DONT_FOLD, FOLD_BLOCK, FOLD_FLOW };
 
 struct ScanScalarParams {
   ScanScalarParams()
-      : eatEnd(false),
+      : end(nullptr),
+        eatEnd(false),
         indent(0),
         detectIndent(false),
         eatLeadingWhitespace(0),
@@ -32,7 +33,8 @@ struct ScanScalarParams {
         leadingSpaces(false) {}
 
   // input:
-  RegEx end;          // what condition ends this scalar?
+  const RegEx* end;   // what condition ends this scalar?
+                      // unowned.
   bool eatEnd;        // should we eat that condition when we see it?
   int indent;         // what level of indentation should be eaten and ignored?
   bool detectIndent;  // should we try to autodetect the indent?
@@ -55,7 +57,7 @@ struct ScanScalarParams {
   bool leadingSpaces;
 };
 
-std::string ScanScalar(Stream& INPUT, ScanScalarParams& info);
+std::string ScanScalar(Stream& INPUT, ScanScalarParams& params);
 }
 
 #endif  // SCANSCALAR_H_62B23520_7C8E_11DE_8A39_0800200C9A66

src/scantag.cpp

@@ -78,4 +78,4 @@ const std::string ScanTagSuffix(Stream& INPUT) {
 
   return tag;
 }
-}
+}  // namespace YAML

src/scantoken.cpp

@@ -37,7 +37,7 @@ void Scanner::ScanDirective() {
     token.value += INPUT.get();
 
   // read parameters
-  while (1) {
+  while (true) {
     // first get rid of whitespace
     while (Exp::Blank().Matches(INPUT))
       INPUT.eat(1);
@@ -171,7 +171,7 @@ void Scanner::ScanBlockEntry() {
 
 // Key
 void Scanner::ScanKey() {
-  // handle keys diffently in the block context (and manage indents)
+  // handle keys differently in the block context (and manage indents)
   if (InBlockContext()) {
     if (!m_simpleKeyAllowed)
       throw ParserException(INPUT.mark(), ErrorMsg::MAP_KEY);
@@ -199,7 +199,7 @@ void Scanner::ScanValue() {
     // seems fine)
     m_simpleKeyAllowed = false;
   } else {
-    // handle values diffently in the block context (and manage indents)
+    // handle values differently in the block context (and manage indents)
     if (InBlockContext()) {
       if (!m_simpleKeyAllowed)
         throw ParserException(INPUT.mark(), ErrorMsg::MAP_VALUE);
@@ -297,8 +297,8 @@ void Scanner::ScanPlainScalar() {
 
   // set up the scanning parameters
   ScanScalarParams params;
-  params.end = (InFlowContext() ? Exp::EndScalarInFlow() : Exp::EndScalar()) ||
-               (Exp::BlankOrBreak() + Exp::Comment());
+  params.end =
+      (InFlowContext() ? &Exp::ScanScalarEndInFlow() : &Exp::ScanScalarEnd());
   params.eatEnd = false;
   params.indent = (InFlowContext() ? 0 : GetTopIndent() + 1);
   params.fold = FOLD_FLOW;
@@ -338,7 +338,8 @@ void Scanner::ScanQuotedScalar() {
 
   // setup the scanning parameters
   ScanScalarParams params;
-  params.end = (single ? RegEx(quote) && !Exp::EscSingleQuote() : RegEx(quote));
+  RegEx end = (single ? RegEx(quote) & !Exp::EscSingleQuote() : RegEx(quote));
+  params.end = &end;
   params.eatEnd = true;
   params.escape = (single ? '\'' : '\\');
   params.indent = 0;
@@ -433,4 +434,4 @@ void Scanner::ScanBlockScalar() {
   token.value = scalar;
   m_tokens.push(token);
 }
-}
+}  // namespace YAML

src/setting.h

@@ -7,41 +7,46 @@
 #pragma once
 #endif
 
+#include "yaml-cpp/noexcept.h"
 #include <memory>
+#include <utility>
 #include <vector>
-#include "yaml-cpp/noncopyable.h"
 
 namespace YAML {
-class SettingChangeBase;
+
+class SettingChangeBase {
+ public:
+  virtual ~SettingChangeBase() = default;
+  virtual void pop() = 0;
+};
 
 template <typename T>
 class Setting {
  public:
   Setting() : m_value() {}
+  Setting(const T& value) : m_value() { set(value); }
 
   const T get() const { return m_value; }
-  std::auto_ptr<SettingChangeBase> set(const T& value);
+  std::unique_ptr<SettingChangeBase> set(const T& value);
   void restore(const Setting<T>& oldSetting) { m_value = oldSetting.get(); }
 
  private:
   T m_value;
 };
 
-class SettingChangeBase {
- public:
-  virtual ~SettingChangeBase() {}
-  virtual void pop() = 0;
-};
-
 template <typename T>
 class SettingChange : public SettingChangeBase {
  public:
-  SettingChange(Setting<T>* pSetting) : m_pCurSetting(pSetting) {
-    // copy old setting to save its state
-    m_oldSetting = *pSetting;
-  }
+  SettingChange(Setting<T>* pSetting)
+      : m_pCurSetting(pSetting),
+        m_oldSetting(*pSetting)  // copy old setting to save its state
+  {}
+  SettingChange(const SettingChange&) = delete;
+  SettingChange(SettingChange&&) = delete;
+  SettingChange& operator=(const SettingChange&) = delete;
+  SettingChange& operator=(SettingChange&&) = delete;
 
-  virtual void pop() { m_pCurSetting->restore(m_oldSetting); }
+  void pop() override { m_pCurSetting->restore(m_oldSetting); }
 
  private:
   Setting<T>* m_pCurSetting;
@@ -49,51 +54,47 @@ class SettingChange : public SettingChangeBase {
 };
 
 template <typename T>
-inline std::auto_ptr<SettingChangeBase> Setting<T>::set(const T& value) {
-  std::auto_ptr<SettingChangeBase> pChange(new SettingChange<T>(this));
+inline std::unique_ptr<SettingChangeBase> Setting<T>::set(const T& value) {
+  std::unique_ptr<SettingChangeBase> pChange(new SettingChange<T>(this));
   m_value = value;
   return pChange;
 }
 
-class SettingChanges : private noncopyable {
+class SettingChanges {
  public:
-  SettingChanges() {}
-  ~SettingChanges() { clear(); }
-
-  void clear() {
-    restore();
-
-    for (setting_changes::const_iterator it = m_settingChanges.begin();
-         it != m_settingChanges.end(); ++it)
-      delete *it;
-    m_settingChanges.clear();
-  }
-
-  void restore() {
-    for (setting_changes::const_iterator it = m_settingChanges.begin();
-         it != m_settingChanges.end(); ++it)
-      (*it)->pop();
-  }
-
-  void push(std::auto_ptr<SettingChangeBase> pSettingChange) {
-    m_settingChanges.push_back(pSettingChange.release());
-  }
-
-  // like std::auto_ptr - assignment is transfer of ownership
-  SettingChanges& operator=(SettingChanges& rhs) {
+  SettingChanges() : m_settingChanges{} {}
+  SettingChanges(const SettingChanges&) = delete;
+  SettingChanges(SettingChanges&&) YAML_CPP_NOEXCEPT = default;
+  SettingChanges& operator=(const SettingChanges&) = delete;
+  SettingChanges& operator=(SettingChanges&& rhs) YAML_CPP_NOEXCEPT {
     if (this == &rhs)
       return *this;
 
     clear();
-    m_settingChanges = rhs.m_settingChanges;
-    rhs.m_settingChanges.clear();
+    std::swap(m_settingChanges, rhs.m_settingChanges);
+
     return *this;
   }
+  ~SettingChanges() { clear(); }
+
+  void clear() YAML_CPP_NOEXCEPT {
+    restore();
+    m_settingChanges.clear();
+  }
+
+  void restore() YAML_CPP_NOEXCEPT {
+    for (const auto& setting : m_settingChanges)
+      setting->pop();
+  }
+
+  void push(std::unique_ptr<SettingChangeBase> pSettingChange) {
+    m_settingChanges.push_back(std::move(pSettingChange));
+  }
 
  private:
-  typedef std::vector<SettingChangeBase*> setting_changes;
+  using setting_changes = std::vector<std::unique_ptr<SettingChangeBase>>;
   setting_changes m_settingChanges;
 };
-}
+}  // namespace YAML
 
 #endif  // SETTING_H_62B23520_7C8E_11DE_8A39_0800200C9A66

src/simplekey.cpp

@@ -5,7 +5,11 @@ namespace YAML {
 struct Mark;
 
 Scanner::SimpleKey::SimpleKey(const Mark& mark_, std::size_t flowLevel_)
-    : mark(mark_), flowLevel(flowLevel_), pIndent(0), pMapStart(0), pKey(0) {}
+    : mark(mark_),
+      flowLevel(flowLevel_),
+      pIndent(nullptr),
+      pMapStart(nullptr),
+      pKey(nullptr) {}
 
 void Scanner::SimpleKey::Validate() {
   // Note: pIndent will *not* be garbage here;
@@ -125,4 +129,4 @@ void Scanner::PopAllSimpleKeys() {
   while (!m_simpleKeys.empty())
     m_simpleKeys.pop();
 }
-}
+}  // namespace YAML