Moved all code to src/ and include/ directories.

src/exp.h

@@ -0,0 +1,71 @@
+#pragma once
+
+#include "regex.h"
+#include <string>
+#include <ios>
+#include "stream.h"
+
+namespace YAML
+{
+	////////////////////////////////////////////////////////////////////////////////
+	// Here we store a bunch of expressions for matching different parts of the file.
+
+	namespace Exp
+	{
+		// misc
+		const RegEx Blank = RegEx(' ') || RegEx('\t');
+		const RegEx Break = RegEx('\n');
+		const RegEx BlankOrBreak = Blank || Break;
+		const RegEx Digit = RegEx('0', '9');
+		const RegEx Alpha = RegEx('a', 'z') || RegEx('A', 'Z');
+		const RegEx AlphaNumeric = Alpha || Digit;
+		const RegEx Hex = Digit || RegEx('A', 'F') || RegEx('a', 'f');
+
+		// actual tags
+
+		const RegEx DocStart = RegEx("---") + (BlankOrBreak || RegEx(EOF) || RegEx());
+		const RegEx DocEnd = RegEx("...") + (BlankOrBreak || RegEx(EOF) || RegEx());
+		const RegEx DocIndicator = DocStart || DocEnd;
+		const RegEx BlockEntry = RegEx('-') + (BlankOrBreak || RegEx(EOF));
+		const RegEx Key = RegEx('?'),
+		            KeyInFlow = RegEx('?') + BlankOrBreak;
+		const RegEx Value = RegEx(':') + BlankOrBreak,
+		            ValueInFlow = RegEx(':') + BlankOrBreak;
+		const RegEx Comment = RegEx('#');
+		const RegEx AnchorEnd = RegEx("?:,]}%@`", REGEX_OR) || BlankOrBreak;
+
+		// Plain scalar rules:
+		// . Cannot start with a blank.
+		// . Can never start with any of , [ ] { } # & * ! | > \' \" % @ `
+		// . In the block context - ? : must be not be followed with a space.
+		// . In the flow context ? is illegal and : and - must not be followed with a space.
+		const RegEx PlainScalar = !(BlankOrBreak || RegEx(",[]{}#&*!|>\'\"%@`", REGEX_OR) || (RegEx("-?:", REGEX_OR) + Blank)),
+		            PlainScalarInFlow = !(BlankOrBreak || RegEx("?,[]{}#&*!|>\'\"%@`", REGEX_OR) || (RegEx("-:", REGEX_OR) + Blank));
+		const RegEx EndScalar = RegEx(':') + BlankOrBreak,
+		            EndScalarInFlow = (RegEx(':') + BlankOrBreak) || RegEx(",?[]{}", REGEX_OR);
+
+		const RegEx EscSingleQuote = RegEx("\'\'");
+		const RegEx EscBreak = RegEx('\\') + Break;
+
+		const RegEx ChompIndicator = RegEx("+-", REGEX_OR);
+		const RegEx Chomp = (ChompIndicator + Digit) || (Digit + ChompIndicator) || ChompIndicator || Digit;
+
+		// and some functions
+		std::string Escape(Stream& in);
+	}
+
+	namespace Keys
+	{
+		const char Directive = '%';
+		const char FlowSeqStart = '[';
+		const char FlowSeqEnd = ']';
+		const char FlowMapStart = '{';
+		const char FlowMapEnd = '}';
+		const char FlowEntry = ',';
+		const char Alias = '*';
+		const char Anchor = '&';
+		const char Tag = '!';
+		const char LiteralScalar = '|';
+		const char FoldedScalar = '>';
+	}
+}