Boo.Lang.Parser.BooParserBase.expression_interpolation C# (CSharp) Метод

        protected ExpressionInterpolationExpression expression_interpolation()
        {
            ExpressionInterpolationExpression e;

            IToken  firstseparator = null;
            IToken  startsep = null;
            IToken  format_sep = null;
            IToken  formatString = null;
            IToken  endsep = null;
            IToken  lastseparator = null;

            e = null;
            Expression param = null;
            LexicalInfo info = null;

            try {      // for error handling
            {
                if ((LA(1)==ESEPARATOR) && (LA(2)==ESEPARATOR))
                {
                    firstseparator = LT(1);
                    match(ESEPARATOR);
                }
                else if ((LA(1)==ESEPARATOR) && (tokenSet_5_.member(LA(2)))) {
                }
                else
                {
                    throw new NoViableAltException(LT(1), getFilename());
                }

            }
            { // ( ... )+
                int _cnt625=0;
                for (;;)
                {
                    if ((LA(1)==ESEPARATOR) && (tokenSet_5_.member(LA(2))))
                    {
                        startsep = LT(1);
                        match(ESEPARATOR);
                        if (0==inputState.guessing)
                        {

                                        if (info == null)
                                        {
                                            info = ToLexicalInfo(startsep);
                                            e = new ExpressionInterpolationExpression(info);
                                        }

                        }
                        param=expression();
                        {
                            switch ( LA(1) )
                            {
                            case ID:
                            case COLON:
                            {
                                {
                                    switch ( LA(1) )
                                    {
                                    case COLON:
                                    {
                                        format_sep = LT(1);
                                        match(COLON);
                                        break;
                                    }
                                    case ID:
                                    {
                                        break;
                                    }
                                    default:
                                    {
                                        throw new NoViableAltException(LT(1), getFilename());
                                    }
                                     }
                                }
                                formatString = LT(1);
                                match(ID);
                                break;
                            }
                            case ESEPARATOR:
                            {
                                break;
                            }
                            default:
                            {
                                throw new NoViableAltException(LT(1), getFilename());
                            }
                             }
                        }
                        if (0==inputState.guessing)
                        {

                                        if (null != param)
                                        {
                                            e.Expressions.Add(param);
                                            if (null != formatString)
                                                param.Annotate("formatString", formatString.getText());
                                        }

                        }
                        endsep = LT(1);
                        match(ESEPARATOR);
                    }
                    else
                    {
                        if (_cnt625 >= 1) { goto _loop625_breakloop; } else { throw new NoViableAltException(LT(1), getFilename());; }
                    }

                    _cnt625++;
                }
            _loop625_breakloop:				;
            }    // ( ... )+
            {
                if ((LA(1)==ESEPARATOR) && (tokenSet_41_.member(LA(2))))
                {
                    lastseparator = LT(1);
                    match(ESEPARATOR);
                }
                else if ((tokenSet_41_.member(LA(1))) && (tokenSet_15_.member(LA(2)))) {
                }
                else
                {
                    throw new NoViableAltException(LT(1), getFilename());
                }

            }
            }
            catch (RecognitionException ex)
            {
            if (0 == inputState.guessing)
            {
                reportError(ex, "expression_interpolation");
                recover(ex,tokenSet_41_);
            }
            else
            {
                throw ex;
            }
            }
            return e;
        }