0d5bcb14ad
Many of the modifications putting in `Box::new` calls also include a pointer to Issue 22405, which tracks going back to `box <expr>` if possible in the future. (Still tried to use `Box<_>` where it sufficed; thus some tests still have `box_syntax` enabled, as they use a mix of `box` and `Box::new`.) Precursor for overloaded-`box` and placement-`in`; see Issue 22181.
25 lines
981 B
Rust
25 lines
981 B
Rust
// Copyright 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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// FIXME (#22405): Replace `Box::new` with `box` here when/if possible.
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fn borrowed_proc<'a>(x: &'a isize) -> Box<FnMut()->(isize) + 'a> {
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// This is legal, because the region bound on `proc`
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// states that it captures `x`.
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Box::new(move|| { *x })
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}
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fn static_proc(x: &isize) -> Box<FnMut()->(isize) + 'static> {
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// This is illegal, because the region bound on `proc` is 'static.
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Box::new(move|| { *x }) //~ ERROR captured variable `x` does not outlive the enclosing closure
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}
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fn main() { }
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