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1 | // Copyright 2012 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. | |
4 | // | |
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. | |
10 | ||
11 | mod argparse { | |
1a4d82fc JJ |
12 | pub struct Flag<'a> { |
13 | name: &'a str, | |
54a0048b | 14 | pub desc: &'a str, |
1a4d82fc JJ |
15 | max_count: usize, |
16 | value: usize | |
223e47cc LB |
17 | } |
18 | ||
19 | pub fn flag<'r>(name: &'r str, desc: &'r str) -> Flag<'r> { | |
20 | Flag { name: name, desc: desc, max_count: 1, value: 0 } | |
21 | } | |
22 | ||
1a4d82fc JJ |
23 | impl<'a> Flag<'a> { |
24 | pub fn set_desc(self, s: &str) -> Flag<'a> { | |
54a0048b | 25 | Flag { //~ ERROR cannot infer |
223e47cc | 26 | name: self.name, |
54a0048b | 27 | desc: s, |
223e47cc LB |
28 | max_count: self.max_count, |
29 | value: self.value | |
30 | } | |
31 | } | |
32 | } | |
33 | } | |
34 | ||
35 | fn main () { | |
1a4d82fc JJ |
36 | let f : argparse::Flag = argparse::flag("flag", "My flag"); |
37 | let updated_flag = f.set_desc("My new flag"); | |
85aaf69f | 38 | assert_eq!(updated_flag.desc, "My new flag"); |
223e47cc | 39 | } |