1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
13 #![allow(unknown_features)]
14 #![feature(box_syntax)]
15 #![feature(unboxed_closures)]
17 struct Parser<'a, I, O> {
18 parse: Box<FnMut<(I,), Result<O, String>> + 'a>
21 impl<'a, I, O: 'a> Parser<'a, I, O> {
22 fn compose<K: 'a>(mut self, mut rhs: Parser<'a, O, K>) -> Parser<'a, I, K> {
24 parse: box move |&mut: x: I| {
25 match (self.parse)(x) {
26 Ok(r) => (rhs.parse)(r),