public final ANTLRv3Parser.notTerminal_return notTerminal() throws RecognitionException {
        ANTLRv3Parser.notTerminal_return retval = new ANTLRv3Parser.notTerminal_return();
        retval.start = input.LT(1);

        CommonTree root_0 = null;

        Token set128=null;

        CommonTree set128_tree=null;

        try {
            // back-end/koopa/trees/antlr/filter/generator/ANTLRv3.g:321:2: ( CHAR_LITERAL | TOKEN_REF | STRING_LITERAL )
            // back-end/koopa/trees/antlr/filter/generator/ANTLRv3.g:
            {
            root_0 = (CommonTree)adaptor.nil();

            set128=(Token)input.LT(1);
            if ( (input.LA(1)>=TOKEN_REF && input.LA(1)<=CHAR_LITERAL) ) {
                input.consume();
                if ( state.backtracking==0 ) adaptor.addChild(root_0, (CommonTree)adaptor.create(set128));
                state.errorRecovery=false;state.failed=false;
            }
            else {
                if (state.backtracking>0) {state.failed=true; return retval;}
                MismatchedSetException mse = new MismatchedSetException(null,input);
                throw mse;
            }


            }

            retval.stop = input.LT(-1);

            if ( state.backtracking==0 ) {

            retval.tree = (CommonTree)adaptor.rulePostProcessing(root_0);
            adaptor.setTokenBoundaries(retval.tree, retval.start, retval.stop);
            }
        }
        catch (RecognitionException re) {
            reportError(re);
            recover(input,re);
    	retval.tree = (CommonTree)adaptor.errorNode(input, retval.start, input.LT(-1), re);

        }
        finally {
        }
        return retval;
    }