fixed SD2-1551

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/3.0@4469 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/BackendBindings/VBNetBinding/Project/Src/Extensions.cs

@@ -0,0 +1,31 @@
+// <file>
+//     <copyright see="prj:///doc/copyright.txt"/>
+//     <license see="prj:///doc/license.txt"/>
+//     <owner name="Markus Palme" email="MarkusPalme@gmx.de"/>
+//     <version>$Revision: 4094 $</version>
+// </file>
+
+using System;
+using System.Collections.Generic;
+
+namespace VBNetBinding
+{
+	public static class Extensions
+	{
+		public static T PeekOrDefault<T>(this Stack<T> stack)
+		{
+			if (stack.Count > 0)
+				return stack.Peek();
+			
+			return default(T);
+		}
+		
+		public static T PopOrDefault<T>(this Stack<T> stack)
+		{
+			if (stack.Count > 0)
+				return stack.Pop();
+			
+			return default(T);
+		}
+	}
+}

src/AddIns/BackendBindings/VBNetBinding/Project/Src/FormattingStrategy/VBNetFormattingStrategy.cs

@@ -637,7 +637,7 @@ namespace VBNetBinding.FormattingStrategy
 			
 			ApplyToRange(textArea, indentation, oldLine, newLine, begin, end);
 			
-			return indentation.Peek().Length;
+			return (indentation.PeekOrDefault() ?? string.Empty).Length;
 		}
 		
 		int GetLastVisualLine(int line, TextArea area)
@@ -652,7 +652,7 @@ namespace VBNetBinding.FormattingStrategy
 
 		void Unindent(Stack<string> indentation)
 		{
-			indentation.Pop();
+			indentation.PopOrDefault();
 		}
 
 		void Indent(TextArea textArea, Stack<string> indentation)
@@ -662,7 +662,7 @@ namespace VBNetBinding.FormattingStrategy
 			
 			string addIndent = (useSpaces) ? new string(' ', indentationSize) : "\t";
 			
-			indentation.Push(indentation.Peek() + addIndent);
+			indentation.Push((indentation.PeekOrDefault() ?? string.Empty) + addIndent);
 		}
 		
 		bool IsBlockStart(ILexer lexer, Token current, Token prev)
@@ -781,7 +781,7 @@ namespace VBNetBinding.FormattingStrategy
 				string noComments = StripComment(lineText).TrimEnd(' ', '\t', '\r', '\n');
 				
 				if (i < selBegin || i > selEnd) {
-					indentation.Pop();
+					indentation.PopOrDefault();
 					indentation.Push(GetIndentation(textArea, i));
 				}
 				
@@ -791,7 +791,7 @@ namespace VBNetBinding.FormattingStrategy
 					multiLine = false;
 				}
 				
-				SmartReplaceLine(textArea.Document, curLine, indentation.Peek() + lineText);
+				SmartReplaceLine(textArea.Document, curLine, (indentation.PeekOrDefault() ?? string.Empty) + lineText);
 				
 				// change indentation afterwards (indent next line)
 				if (!multiLine && noComments.EndsWith("_")) {

src/AddIns/BackendBindings/VBNetBinding/Project/VBNetBinding.csproj

@@ -50,6 +50,7 @@
   <ItemGroup>
     <Compile Include="Configuration\AssemblyInfo.cs" />
     <EmbeddedResource Include="Resources\BuildOptions.xfrm" />
+    <Compile Include="Src\Extensions.cs" />
     <Compile Include="Src\FormattingStrategy\VBStatement.cs" />
     <Compile Include="Src\VBNetLanguageBinding.cs" />
     <Compile Include="Src\FormattingStrategy\VBNetFormattingStrategy.cs" />