rust/src/test/auxiliary/static-methods-crate.rs

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// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#[link(name = "static_methods_crate",
vers = "0.1")];
#[crate_type = "lib"];
pub trait read {
static fn readMaybe(s: ~str) -> Option<Self>;
}
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impl int: read {
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static fn readMaybe(s: ~str) -> Option<int> {
int::from_str(s)
}
}
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impl bool: read {
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static fn readMaybe(s: ~str) -> Option<bool> {
match s {
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~"true" => Some(true),
~"false" => Some(false),
_ => None
}
}
}
pub fn read<T: read Copy>(s: ~str) -> T {
match read::readMaybe(s) {
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Some(x) => x,
_ => fail!(~"read failed!")
}
}