33 lines
1.0 KiB
Rust
33 lines
1.0 KiB
Rust
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// 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 in a by-ref once closure we move some variables even as
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// we capture others by mutable reference.
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fn call<F>(f: F) where F : FnOnce() {
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f();
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}
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fn main() {
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let mut x = vec!(format!("Hello"));
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let y = vec!(format!("World"));
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call(|| {
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// Here: `x` must be captured with a mutable reference in
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// order for us to append on it, and `y` must be captured by
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// value.
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for item in y.into_iter() {
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x.push(item);
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}
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});
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assert_eq!(x.len(), 2);
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assert_eq!(&*x[0], "Hello");
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assert_eq!(&*x[1], "World");
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}
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