private static bool Expression() { string lexeme = Tokens.GetToken().lexeme; if (lexeme == "(") { if (semanticPass) { SemanticActions.oPush(Tokens.GetToken()); } Tokens.NextToken(); if (!Expression()) { SyntaxError(Tokens.GetToken(), "expression"); } if (Tokens.GetToken().lexeme != ")") { SyntaxError(Tokens.GetToken(), ")"); } if (semanticPass) { SemanticActions.ShuntYardAll(); } Tokens.NextToken(); Expressionz(); return(true); } else if (lexeme == "+" || lexeme == "-" || lexeme == "true" || lexeme == "false" || lexeme == "null" || lexeme == "this" || Tokens.GetToken().type == Token.Type.Number || Tokens.GetToken().type == Token.Type.Character) { if (Tokens.GetToken().lexeme == "this") { if (semanticPass) { SemanticActions.iPush(Tokens.GetToken(), scope); SemanticActions.iExist(); } Tokens.NextToken(); Member_Refz(); Expressionz(); return(true); } else if (lexeme == "true" || lexeme == "false" || lexeme == "null") { string[] data = new string[2]; data[0] = "returnType:bool"; data[1] = "accessMod:public"; Symbol symbol; if (lexeme == "true") { symbol = new Symbol("g", ("Btrue"), "1", "blit", data); } else if (lexeme == "false") { symbol = new Symbol("g", ("Bfalse"), "0", "blit", data); } else { data[0] = "returnType:null"; symbol = new Symbol("g", "null", "2018", "null", data); } SymbolTable.Add(symbol); if (semanticPass) { SemanticActions.lPush(symbol, Tokens.GetToken(), scope); } Tokens.NextToken(); Expressionz(); return(true); } else if (numeric_literal()) { Tokens.NextToken(); Expressionz(); return(true); } else if (character_literal()) { Tokens.NextToken(); Expressionz(); return(true); } return(false); } else if (Tokens.GetToken().type == Token.Type.Identifier) { currentIdentifier = Tokens.GetToken().lexeme; if (semanticPass) { SemanticActions.iPush(Tokens.GetToken(), scope); } Tokens.NextToken(); Fn_Arr_Member(); if (semanticPass) { SemanticActions.iExist(); } Member_Refz(); Expressionz(); return(true); } return(false); }