Fixed bug with simple keys that are quoted scalars

src/scantoken.cpp

@@ -309,8 +309,8 @@ namespace YAML
 	{
 		std::string scalar;
 
-		// eat single or double quote
-		char quote = INPUT.get();
+		// peek at single or double quote (don't eat because we need to preserve (for the time being) the input position)
+		char quote = INPUT.peek();
 		bool single = (quote == '\'');
 
 		// setup the scanning parameters
@@ -330,6 +330,11 @@ namespace YAML
 			InsertSimpleKey();
 
 		int line = INPUT.line, column = INPUT.column;
+
+		// now eat that opening quote
+		INPUT.get();
+		
+		// and scan
 		scalar = ScanScalar(INPUT, params);
 		m_simpleKeyAllowed = false;
 

yaml-reader/parsertests.cpp

 #include "tests.h"
 #include "yaml.h"
 #include <sstream>
+#include <algorithm>
 
 namespace Test
 {
@@ -218,5 +219,33 @@ namespace Test
 
 			return true;
 		}
+
+		bool QuotedSimpleKeys()
+		{
+			std::string KeyValue[3] = { "\"double\": double\n", "'single': single\n", "plain: plain\n" };
+			
+			int perm[3] = { 0, 1, 2 };
+			do {
+				std::string input = KeyValue[perm[0]] + KeyValue[perm[1]] + KeyValue[perm[2]];
+
+				std::stringstream stream(input);
+				YAML::Parser parser(stream);
+				YAML::Node doc;
+				parser.GetNextDocument(doc);
+				
+				std::string output;
+				doc["double"] >> output;
+				if(output != "double")
+					return false;
+				doc["single"] >> output;
+				if(output != "single")
+					return false;
+				doc["plain"] >> output;
+				if(output != "plain")
+					return false;
+			} while(std::next_permutation(perm, perm + 3));
+				
+			return true;
+		}
 	}
 }

yaml-reader/tests.cpp

@@ -262,6 +262,7 @@ namespace Test
 		RunParserTest(&Parser::SimpleMap, "simple map", passed);
 		RunParserTest(&Parser::FlowSeq, "flow seq", passed);
 		RunParserTest(&Parser::FlowMap, "flow map", passed);
+		RunParserTest(&Parser::QuotedSimpleKeys, "quoted simple keys", passed);
 
 		RunEncodingTest(&EncodeToUtf8, false, "UTF-8, no BOM", passed);
 		RunEncodingTest(&EncodeToUtf8, true, "UTF-8 with BOM", passed);

yaml-reader/tests.h

@@ -28,6 +28,7 @@ namespace Test {
 		bool SimpleMap();
 		bool FlowSeq();
 		bool FlowMap();
+		bool QuotedSimpleKeys();
 	}
 	
 	namespace Emitter {