31 lines
960 B
Rust
31 lines
960 B
Rust
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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![feature(unboxed_closures)]
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struct Parser<'a, I, O> {
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parse: Box<FnMut<(I,), Result<O, String>> + 'a>
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}
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impl<'a, I, O: 'a> Parser<'a, I, O> {
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fn compose<K: 'a>(mut self, mut rhs: Parser<O, K>) -> Parser<'a, I, K> {
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Parser {
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parse: box move |&mut: x: I| {
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match self.parse.call_mut((x,)) {
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Ok(r) => rhs.parse.call_mut((r,)),
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Err(e) => Err(e)
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}
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}
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}
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}
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}
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fn main() {}
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