ProgrammingLanguageNr1.Parser.fromMinToMaxArrayCreation C# (CSharp) Method

        private AST fromMinToMaxArrayCreation()
        {
            #if WRITE_DEBUG_INFO
            Console.WriteLine("fromMinToMaxArrayCreation");
            #endif

            try {
                Token fromToken = match(Token.TokenType.FROM);

                AST minValue = expression();

                if(minValue == null) { throw new Error("Missing expression after 'from'",
                                             	Error.ErrorType.SYNTAX,
                                                    fromToken.LineNr, fromToken.LinePosition + 5 ); }

                match(Token.TokenType.TO);
                AST maxValue = expression();

                if(maxValue == null) { throw new Error("Missing expression after 'to'",
                                             	Error.ErrorType.SYNTAX,
                                                    fromToken.LineNr, fromToken.LinePosition + 3 ); }

                AST_FunctionCall callRangeFunction = new AST_FunctionCall(new Token(Token.TokenType.FUNCTION_CALL, "Range"));
                AST argumentList = new AST(new Token(Token.TokenType.NODE_GROUP, "<ARGUMENT_LIST>"));
                argumentList.addChild(minValue);
                argumentList.addChild(maxValue);
                callRangeFunction.addChild(argumentList);

                return callRangeFunction;
            }
            catch(Error e) {
                m_errorHandler.errorOccured(e);
                return null;
            }
        }