More simple scalar scanning.

document.cpp

@@ -36,8 +36,9 @@ namespace YAML
 
 		try {
 			scanner.Scan();
-		} catch(const UnknownToken& e) {
+		} catch(const Exception& e) {
 		}
+		getchar();
 //		if(!scanner)
 //			return;
 

exceptions.h

@@ -11,4 +11,5 @@ namespace YAML
 	class IllegalMapKey: public Exception {};
 	class IllegalMapValue: public Exception {};
 	class IllegalScalar: public Exception {};
+	class IllegalTabInScalar: public Exception {};
 }

scanner.h

@@ -43,13 +43,14 @@ namespace YAML
 
 	private:
 		char GetChar();
+		void Eat(int n = 1);
+		std::string Peek(int n);
+
 		void EatLineBreak();
-		void EatDocumentStart();
-		void EatDocumentEnd();
 
-		bool IsWhitespaceToBeEaten();
-		bool IsLineBreak();
-		bool IsBlank();
+		bool IsWhitespaceToBeEaten(char ch);
+		bool IsLineBreak(char ch);
+		bool IsBlank(char ch);
 		bool IsDocumentStart();
 		bool IsDocumentEnd();
 		bool IsBlockEntry();

token.h

@@ -2,7 +2,7 @@
 
 namespace YAML
 {
-	class Token {};
+	class Token { public: virtual ~Token() {} };
 
 	class StreamStartToken: public Token {};
 	class StreamEndToken: public Token {};