30 lines
805 B
Rust
30 lines
805 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 thing<A> {
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fn foo() -> Option<A>;
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}
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impl<A> int: thing<A> {
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fn foo() -> Option<A> { None }
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}
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fn foo_func<A, B: thing<A>>(x: B) -> Option<A> { x.foo() }
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struct A { a: int }
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pub fn main() {
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for iter::eachi(&(Some(A {a: 0}))) |i, a| {
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debug!("%u %d", i, a.a);
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}
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let _x: Option<float> = foo_func(0);
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}
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