Boo.Lang.Parser.BooParserBase.ast_literal_expression C# (CSharp) Method

        public QuasiquoteExpression ast_literal_expression()
        {
            QuasiquoteExpression e;

            IToken  begin = null;
            IToken  end = null;

            e = null;

            try {      // for error handling
            begin = LT(1);
            match(QQ_BEGIN);
            if (0==inputState.guessing)
            {
                e = new QuasiquoteExpression(ToLexicalInfo(begin));
            }
            {
                switch ( LA(1) )
                {
                case INDENT:
                {
                    {
                        match(INDENT);
                        ast_literal_block(e);
                        match(DEDENT);
                        {
                            switch ( LA(1) )
                            {
                            case EOL:
                            case EOS:
                            {
                                eos();
                                break;
                            }
                            case QQ_END:
                            {
                                break;
                            }
                            default:
                            {
                                throw new NoViableAltException(LT(1), getFilename());
                            }
                             }
                        }
                    }
                    break;
                }
                case ESEPARATOR:
                case CAST:
                case CHAR:
                case FALSE:
                case IMPORT:
                case NOT:
                case NULL:
                case RAISE:
                case RETURN:
                case SELF:
                case SUPER:
                case THEN:
                case TRUE:
                case TYPEOF:
                case YIELD:
                case TRIPLE_QUOTED_STRING:
                case LPAREN:
                case DOUBLE_QUOTED_STRING:
                case SINGLE_QUOTED_STRING:
                case ID:
                case MULTIPLY:
                case LBRACK:
                case COMMA:
                case SPLICE_BEGIN:
                case DOT:
                case LBRACE:
                case QQ_BEGIN:
                case SUBTRACT:
                case LONG:
                case INCREMENT:
                case DECREMENT:
                case ONES_COMPLEMENT:
                case INT:
                case BACKTICK_QUOTED_STRING:
                case RE_LITERAL:
                case DOUBLE:
                case FLOAT:
                case TIMESPAN:
                {
                    ast_literal_closure(e);
                    break;
                }
                default:
                {
                    throw new NoViableAltException(LT(1), getFilename());
                }
                 }
            }
            end = LT(1);
            match(QQ_END);
            if (0==inputState.guessing)
            {
                SetEndSourceLocation(e, end);
            }
            }
            catch (RecognitionException ex)
            {
            if (0 == inputState.guessing)
            {
                reportError(ex, "ast_literal_expression");
                recover(ex,tokenSet_41_);
            }
            else
            {
                throw ex;
            }
            }
            return e;
        }