public final void mESC() throws RecognitionException {
        try {
            // C:\\Documents and Settings\\Administrator\\workspace_android4\\myosotis\\grammar\\Calc.g:119:5: ( '\\\\' ( 'b' | 't' | 'n' | 'f' | 'r' | '\\\"' | '\\'' | '\\\\' ) )
            // C:\\Documents and Settings\\Administrator\\workspace_android4\\myosotis\\grammar\\Calc.g:119:7: '\\\\' ( 'b' | 't' | 'n' | 'f' | 'r' | '\\\"' | '\\'' | '\\\\' )
            {
            match('\\'); 
            if ( input.LA(1)=='\"'||input.LA(1)=='\''||input.LA(1)=='\\'||input.LA(1)=='b'||input.LA(1)=='f'||input.LA(1)=='n'||input.LA(1)=='r'||input.LA(1)=='t' ) {
                input.consume();

            }
            else {
                MismatchedSetException mse = new MismatchedSetException(null,input);
                recover(mse);
                throw mse;}


            }

        }
        finally {
        }
    }