40 lines
1.2 KiB
Rust
40 lines
1.2 KiB
Rust
// Copyright 2012 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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mod argparse {
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pub struct Flag<'a> {
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name: &'a str,
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desc: &'a str,
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max_count: usize,
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value: usize
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}
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pub fn flag<'r>(name: &'r str, desc: &'r str) -> Flag<'r> {
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Flag { name: name, desc: desc, max_count: 1, value: 0 }
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}
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impl<'a> Flag<'a> {
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pub fn set_desc(self, s: &str) -> Flag<'a> {
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Flag {
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name: self.name,
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desc: s, //~ ERROR cannot infer an appropriate lifetime for automatic coercion due t
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max_count: self.max_count,
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value: self.value
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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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let f : argparse::Flag = argparse::flag("flag", "My flag");
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let updated_flag = f.set_desc("My new flag");
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assert_eq!(updated_flag.desc, "My new flag");
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}
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