/// <summary> /// Extracts the body of the given preprocessor directive symbol, parses it, and returns the parsed expression. /// </summary> /// <param name="parser">The C# parser.</param> /// <param name="sourceCode">The source code containing the preprocessor directive symbol.</param> /// <param name="preprocessorSymbol">The preprocessor directive symbol.</param> /// <param name="startIndex">The index of the start of the expression body within the text string.</param> /// <returns>Returns the expression.</returns> internal static Expression GetConditionalPreprocessorBodyExpression( CsParser parser, SourceCode sourceCode, Symbol preprocessorSymbol, int startIndex) { Param.AssertNotNull(parser, "parser"); Param.AssertNotNull(sourceCode, "sourceCode"); Param.AssertNotNull(preprocessorSymbol, "preprocessorSymbol"); Param.AssertGreaterThanOrEqualToZero(startIndex, "startIndex"); Debug.Assert(preprocessorSymbol.SymbolType == SymbolType.PreprocessorDirective, "The symbol is not a preprocessor directive."); string text = preprocessorSymbol.Text.Substring(startIndex, preprocessorSymbol.Text.Length - startIndex).Trim(); if (text.Length > 0) { using (StringReader reader = new StringReader(text)) { // Extract the symbols within this text. CodeLexer lexer = new CodeLexer(parser, sourceCode, new CodeReader(reader)); List<Symbol> symbolList = lexer.GetSymbols(sourceCode, null); SymbolManager directiveSymbols = new SymbolManager(symbolList); CodeParser preprocessorBodyParser = new CodeParser(parser, directiveSymbols); // Parse these symbols to create the body expression. return preprocessorBodyParser.GetNextConditionalPreprocessorExpression(sourceCode); } } // The directive has no body. return null; }
internal static Expression GetConditionalPreprocessorBodyExpression(CsParser parser, SourceCode sourceCode, Symbol preprocessorSymbol, int startIndex) { string s = preprocessorSymbol.Text.Substring(startIndex, preprocessorSymbol.Text.Length - startIndex).Trim(); if (s.Length > 0) { StringReader code = new StringReader(s); CodeLexer lexer = new CodeLexer(parser, sourceCode, new CodeReader(code)); SymbolManager symbols = new SymbolManager(lexer.GetSymbols(sourceCode, null)); CodeParser parser2 = new CodeParser(parser, symbols); return parser2.GetNextConditionalPreprocessorExpression(sourceCode); } return null; }