MonoDevelop.CSharp.Completion.CSharpTextEditorCompletion.GetTextWithoutCommentsAndStrings C# (CSharp) Method

		static IEnumerable<KeyValuePair <char, int>> GetTextWithoutCommentsAndStrings (Mono.TextEditor.Document doc, int start, int end) 
		{
			bool isInString = false, isInChar = false;
			bool isInLineComment = false, isInBlockComment = false;
			
			for (int pos = start; pos < end; pos++) {
				char ch = doc.GetCharAt (pos);
				switch (ch) {
					case '\r':
					case '\n':
						isInLineComment = false;
						break;
					case '/':
						if (isInBlockComment) {
							if (pos > 0 && doc.GetCharAt (pos - 1) == '*') 
								isInBlockComment = false;
						} else  if (!isInString && !isInChar && pos + 1 < doc.Length) {
							char nextChar = doc.GetCharAt (pos + 1);
							if (nextChar == '/')
								isInLineComment = true;
							if (!isInLineComment && nextChar == '*')
								isInBlockComment = true;
						}
						break;
					case '"':
						if (!(isInChar || isInLineComment || isInBlockComment)) 
							isInString = !isInString;
						break;
					case '\'':
						if (!(isInString || isInLineComment || isInBlockComment)) 
							isInChar = !isInChar;
						break;
					default :
						if (!(isInString || isInChar || isInLineComment || isInBlockComment))
							yield return new KeyValuePair<char, int> (ch, pos);
						break;
				}
			}
		}