35 lines
888 B
Rust
35 lines
888 B
Rust
// Copyright 2015 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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// Test that we are able to infer a suitable kind for this closure
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// that is just called (`FnOnce`).
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use std::mem;
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struct DropMe<'a>(&'a mut i32);
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impl<'a> Drop for DropMe<'a> {
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fn drop(&mut self) {
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*self.0 += 1;
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}
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}
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fn main() {
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let mut counter = 0;
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{
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let drop_me = DropMe(&mut counter);
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let tick = || mem::drop(drop_me);
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tick();
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}
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assert_eq!(counter, 1);
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}
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