(Actually) fixed the folding newline bug, but it's a bit messy, and we don't accurately make the distinction between block folding and flow folding

src/exp.cpp

@@ -83,7 +83,7 @@ namespace YAML
 
 			// now do the slash (we're not gonna check if it's a slash - you better pass one!)
 			switch(ch) {
-				case '0': return std::string("\x00", 1);
+				case '0': return std::string(1, '\x00');
 				case 'a': return "\x07";
 				case 'b': return "\x08";
 				case 't':

src/scanscalar.cpp

@@ -110,7 +110,7 @@ namespace YAML
 
 			// was this an empty line?
 			bool nextEmptyLine = Exp::Break.Matches(INPUT);
-			bool nextMoreIndented = (INPUT.peek() == ' ');
+			bool nextMoreIndented = Exp::Blank.Matches(INPUT);
 			if(params.fold && foldedNewlineCount == 0 && nextEmptyLine)
 				foldedNewlineStartedMoreIndented = moreIndented;
 
@@ -125,8 +125,9 @@ namespace YAML
 						scalar += "\n";
 					
 					if(!nextEmptyLine && foldedNewlineCount > 0) {
+						scalar += std::string(foldedNewlineCount - 1, '\n');
 						if(foldedNewlineStartedMoreIndented || nextMoreIndented)
-							scalar += std::string("\n", foldedNewlineCount);
+							scalar += "\n";
 						foldedNewlineCount = 0;
 					}
 				} else {

yaml-reader/spectests.cpp

@@ -952,6 +952,65 @@ namespace Test {
 			YAML_ASSERT(doc["Chomping"] == "Clipped empty lines\n");
 			return true;
 		}
+		
+		// 6.6
+		TEST LineFolding()
+		{
+			std::string input =
+				">-\n"
+				"  trimmed\n"
+				"  \n"
+				" \n"
+				"\n"
+				"  as\n"
+				"  space";
+			std::stringstream stream(input);
+			YAML::Parser parser(stream);
+			YAML::Node doc;
+			parser.GetNextDocument(doc);
+			
+			YAML_ASSERT(doc == "trimmed\n\n\nas space");
+			return true;
+		}
+		
+		// 6.7
+		TEST BlockFolding()
+		{
+			std::string input =
+				">\n"
+				"  foo \n"
+				" \n"
+				"  \t bar\n"
+				"\n"
+				"  baz\n";
+			std::stringstream stream(input);
+			YAML::Parser parser(stream);
+			YAML::Node doc;
+			parser.GetNextDocument(doc);
+			
+			YAML_ASSERT(doc == "foo \n\n\t bar\n\nbaz\n");
+			return true;
+		}
+		
+		// 6.8
+		TEST FlowFolding()
+		{
+			std::string input =
+				"\"\n"
+				"  foo \n"
+				" \n"
+				"  \t bar\n"
+				"\n"
+				"  baz\n"
+				"\"";
+			std::stringstream stream(input);
+			YAML::Parser parser(stream);
+			YAML::Node doc;
+			parser.GetNextDocument(doc);
+			
+			YAML_ASSERT(doc == " foo\nbar\nbaz ");
+			return true;
+		}
 	}
 
 	bool RunSpecTests()
@@ -995,6 +1054,9 @@ namespace Test {
 		RunSpecTest(&Spec::SeparationSpaces, "6.3", "Separation Spaces", passed, total);
 		RunSpecTest(&Spec::LinePrefixes, "6.4", "Line Prefixes", passed, total);
 		RunSpecTest(&Spec::EmptyLines, "6.5", "Empty Lines", passed, total);
+		RunSpecTest(&Spec::LineFolding, "6.6", "Line Folding", passed, total);
+		RunSpecTest(&Spec::BlockFolding, "6.7", "Block Folding", passed, total);
+		RunSpecTest(&Spec::FlowFolding, "6.8", "Flow Folding", passed, total);
 
 		std::cout << "Spec tests: " << passed << "/" << total << " passed\n";
 		return passed == total;