Mostly finished refactoring the scalar scanning.

exceptions.h

@@ -11,10 +11,10 @@ namespace YAML
 	class IllegalMapKey: public Exception {};
 	class IllegalMapValue: public Exception {};
 	class IllegalScalar: public Exception {};
-	class IllegalTabInScalar: public Exception {};
+	class IllegalTabInIndentation: public Exception {};
 	class IllegalFlowEnd: public Exception {};
-	class DocIndicatorInQuote: public Exception {};
-	class EOFInQuote: public Exception {};
+	class IllegalDocIndicator: public Exception {};
+	class IllegalEOF: public Exception {};
 	class RequiredSimpleKeyNotFound: public Exception {};
 	class ZeroIndentationInBlockScalar: public Exception {};
 	class UnexpectedCharacterInBlockScalar: public Exception {};

exp.h

@@ -25,6 +25,7 @@ namespace YAML
 
 		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;

scanner.h

@@ -19,19 +19,20 @@ namespace YAML
 		~Scanner();
 
 		Token *GetNextToken();
+		void Scan();
 
+	private:
+		// scanning
 		void ScanNextToken();
 		void ScanToNextToken();
 		Token *PushIndentTo(int column, bool sequence);
 		void PopIndentTo(int column);
 
+		// checking input
 		void InsertSimpleKey();
 		bool VerifySimpleKey();
 		void VerifyAllSimpleKeys();
 
-		void Scan();
-
-	private:
 		bool IsWhitespaceToBeEaten(char ch);
 		bool IsDocumentStart();
 		bool IsDocumentEnd();

scanscalar.h

@@ -7,35 +7,29 @@
 namespace YAML
 {
 	enum CHOMP { STRIP = -1, CLIP, KEEP };
+	enum ACTION { NONE, BREAK, THROW };
 
 	struct ScanScalarInfo {
-		ScanScalarInfo(): eatEnd(false), indent(0), eatLeadingWhitespace(0), escape(0), fold(false), trimTrailingSpaces(0), chomp(CLIP) {}
+		ScanScalarInfo(): eatEnd(false), indent(0), detectIndent(false), eatLeadingWhitespace(0), escape(0), fold(false),
+			trimTrailingSpaces(0), chomp(CLIP), onDocIndicator(NONE), onTabInIndentation(NONE), leadingSpaces(false) {}
 
+		// input:
 		RegEx end;                      // what condition ends this scalar?
 		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?
 		bool eatLeadingWhitespace;      // should we continue eating this delicious indentation after 'indent' spaces?
 		char escape;                    // what character do we escape on (i.e., slash or single quote) (0 for none)
 		bool fold;                      // do we fold line ends?
 		bool trimTrailingSpaces;        // do we remove all trailing spaces (at the very end)
 		CHOMP chomp;                    // do we strip, clip, or keep trailing newlines (at the very end)
 		                                //   Note: strip means kill all, clip means keep at most one, keep means keep all
-	};
-
-	void GetBlockIndentation(Stream& INPUT, int& indent, std::string& breaks, int topIndent);
-	std::string ScanScalar(Stream& INPUT, ScanScalarInfo info);
-
-	struct WhitespaceInfo {
-		WhitespaceInfo();
+		ACTION onDocIndicator;          // what do we do if we see a document indicator?
+		ACTION onTabInIndentation;      // what do we do if we see a tab where we should be seeing indentation spaces
 
-		void SetChompers(char ch);
-		void AddBlank(char ch);
-		void AddBreak(const std::string& line);
-		std::string Join(bool lastline = false);
-
-		bool leadingBlanks;
-		bool fold;
-		std::string whitespace, leadingBreaks, trailingBreaks;
-		int chomp, increment;
+		// output:
+		bool leadingSpaces;
 	};
+
+	std::string ScanScalar(Stream& INPUT, ScanScalarInfo& info);
 }

test.yaml

 ---
-- "quoted scalar\twith a tab\nand a newline"
-- 'This is Jesse''s single quote!'
-- |
-  here's a literal:
-  #include <iostream>
-  
-  int main()
-  {
-     std::cout << "Hello World!\n";
-     return 0;
-  }
-- key1: value1
-  key2: value2
\ No newline at end of file
+- here's a key: value
+  here's the first block: |
+  after the block: value
+  and here's a block: |-
+    What's going on?
+    How are you doing?
+    Here's some code:
+    
+      #include <iostream>
+      int main()
+      {
+         std::cout << "Hello World!\n";
+      }
+    
+    I'm doing fine!
+  and last key: value
\ No newline at end of file