remove isLastLine from interface - use stack instead; fix null reference if resolve of TypeDefinition fails

ICSharpCode.Decompiler/Ast/AstBuilder.cs

@@ -428,12 +428,12 @@ namespace ICSharpCode.Decompiler.Ast
 					} else {
 						astType = new SimpleType(name);
 
-						if (!type.HasGenericParameters) {
 						// Look for generic type parameters defined in TypeDefinition
 						// allows us to display angle brackets in unbound type names
 						// e.g. typeof(List<>)
 						TypeDefinition resolvedType = type.Resolve();
 						
+						if (!type.HasGenericParameters && resolvedType != null) {
 							for (int i = 0; i < resolvedType.GenericParameters.Count; i++) {
 								((SimpleType)astType).TypeArguments.Add(new SimpleType(""));
 							}

ICSharpCode.Decompiler/Ast/TextOutputFormatter.cs

@@ -103,7 +103,7 @@ namespace ICSharpCode.Decompiler.Ast
 			output.WriteLine();
 		}
 		
-		public void WriteComment(CommentType commentType, string content, bool isLastLine = false)
+		public void WriteComment(CommentType commentType, string content)
 		{
 			switch (commentType) {
 				case CommentType.SingleLine:
@@ -121,6 +121,7 @@ namespace ICSharpCode.Decompiler.Ast
 					output.Write("///");
 					output.Write(content);
 					inDocumentationComment = true;
+					bool isLastLine = !(nodeStack.Peek().NextSibling is Comment);
 					if (isLastLine) {
 						inDocumentationComment = false;
 						output.MarkFoldEnd();

NRefactory/ICSharpCode.NRefactory/CSharp/OutputVisitor/IOutputFormatter.cs

@@ -39,6 +39,6 @@ namespace ICSharpCode.NRefactory.CSharp
 		
 		void NewLine();
 		
-		void WriteComment(CommentType commentType, string content, bool isLastLine = false);
+		void WriteComment(CommentType commentType, string content);
 	}
 }

NRefactory/ICSharpCode.NRefactory/CSharp/OutputVisitor/OutputVisitor.cs

@@ -2147,9 +2147,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				// "1.0 / /*comment*/a", then we need to insert a space in front of the comment.
 				formatter.Space();
 			}
-			bool isContinuing = (comment.NextSibling is Comment && ((Comment)comment.NextSibling).CommentType == comment.CommentType);
-			
-			formatter.WriteComment(comment.CommentType, comment.Content, !isContinuing);
+			formatter.WriteComment(comment.CommentType, comment.Content);
 			lastWritten = LastWritten.Whitespace;
 			return null;
 		}

NRefactory/ICSharpCode.NRefactory/CSharp/OutputVisitor/TextWriterOutputFormatter.cs

@@ -88,7 +88,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			indentation--;
 		}
 		
-		public void WriteComment(CommentType commentType, string content, bool isLastLine = false)
+		public void WriteComment(CommentType commentType, string content)
 		{
 			WriteIndentation();
 			switch (commentType) {