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26 lines
734 B
Rust
26 lines
734 B
Rust
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// Copyright 2013-2014 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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// Check that safe fns are not a subtype of unsafe fns.
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fn foo(x: i32) -> i32 {
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x * 22
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}
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fn bar(x: fn(i32) -> i32) -> unsafe fn(i32) -> i32 {
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x // OK, coercion!
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}
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fn main() {
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let f = bar(foo);
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let x = unsafe { f(2) };
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assert_eq!(x, 44);
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}
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