27 lines
717 B
Rust
27 lines
717 B
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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trait double {
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fn double() -> uint;
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}
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impl double for uint {
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fn double() -> uint { self * 2u }
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}
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fn is_equal<D: double>(x: @D, exp: uint) {
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assert x.double() == exp;
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}
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pub fn main() {
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let x = @(3u as double);
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is_equal(x, 6);
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}
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