From 33a71151ca595a0e96f3324ac536078d6cddaba5 Mon Sep 17 00:00:00 2001
From: beder <jbeder@gmail.com>
Date: Sat, 10 Sep 2011 16:50:44 -0500
Subject: [PATCH] Added helper emitter functions, but we have a problem:
 YAML::Value is already a manipulator

---
 include/yaml-cpp/value.h      |  1 +
 include/yaml-cpp/value/emit.h | 21 +++++++++++++++++++++
 src/value/emit.cpp            | 23 +++++++++++++++++++++++
 src/value/valueevents.h       |  2 +-
 util/value.cpp                |  4 +---
 5 files changed, 47 insertions(+), 4 deletions(-)
 create mode 100644 include/yaml-cpp/value/emit.h
 create mode 100644 src/value/emit.cpp

diff --git a/include/yaml-cpp/value.h b/include/yaml-cpp/value.h
index 9f11204..f4b3d61 100644
--- a/include/yaml-cpp/value.h
+++ b/include/yaml-cpp/value.h
@@ -12,5 +12,6 @@
 #include "yaml-cpp/value/iterator.h"
 #include "yaml-cpp/value/detail/impl.h"
 #include "yaml-cpp/value/parse.h"
+#include "yaml-cpp/value/emit.h"
 
 #endif // VALUE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
diff --git a/include/yaml-cpp/value/emit.h b/include/yaml-cpp/value/emit.h
new file mode 100644
index 0000000..056b65e
--- /dev/null
+++ b/include/yaml-cpp/value/emit.h
@@ -0,0 +1,21 @@
+#ifndef VALUE_EMIT_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define VALUE_EMIT_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 <string>
+#include <iosfwd>
+
+namespace YAML
+{
+	class Emitter;
+	class Value;
+	
+	Emitter& operator << (Emitter& out, const foo& value);
+	std::ostream& operator << (std::ostream& out, const Value& value);
+}
+
+#endif // VALUE_EMIT_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
diff --git a/src/value/emit.cpp b/src/value/emit.cpp
new file mode 100644
index 0000000..3cfc13d
--- /dev/null
+++ b/src/value/emit.cpp
@@ -0,0 +1,23 @@
+#include "yaml-cpp/value/emit.h"
+#include "yaml-cpp/emitfromevents.h"
+#include "yaml-cpp/emitter.h"
+#include "valueevents.h"
+
+namespace YAML
+{
+	Emitter& operator << (Emitter& out, const Value& value)
+	{
+		EmitFromEvents emitFromEvents(out);
+		ValueEvents events(value);
+		events.Emit(emitFromEvents);
+		return out;
+	}
+	
+	std::ostream& operator << (std::ostream& out, const Value& value)
+	{
+		Emitter emitter;
+		emitter << value;
+		out << emitter.c_str();
+		return out;
+	}
+}
diff --git a/src/value/valueevents.h b/src/value/valueevents.h
index eeb74d6..4a7761f 100644
--- a/src/value/valueevents.h
+++ b/src/value/valueevents.h
@@ -18,7 +18,7 @@ namespace YAML
 	class ValueEvents
 	{
 	public:
-		ValueEvents(const Value& value);
+		explicit ValueEvents(const Value& value);
 		
 		void Emit(EventHandler& handler);
 		
diff --git a/util/value.cpp b/util/value.cpp
index f5a1307..164d569 100644
--- a/util/value.cpp
+++ b/util/value.cpp
@@ -4,9 +4,7 @@
 int main()
 {
 	YAML::Value value = YAML::Parse("{foo: bar, monkey: value}");
-	for(YAML::const_iterator it=value.begin();it!=value.end();++it) {
-		std::cout << it->first.as<std::string>() << " -> " << it->second.as<std::string>() << "\n";
-	}
+	std::cout << value << "\n";
 	
 	return 0;
 }