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.
46 lines
1.3 KiB
Rust
46 lines
1.3 KiB
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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#![feature(unsafe_destructor)]
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use std::cell::Cell;
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#[derive(Debug)]
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struct r<'a> {
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i: &'a Cell<isize>,
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}
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#[unsafe_destructor]
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impl<'a> Drop for r<'a> {
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fn drop(&mut self) {
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unsafe {
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self.i.set(self.i.get() + 1);
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}
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}
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}
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fn f<T>(__isize: Vec<T> , _j: Vec<T> ) {
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}
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fn clone<T: Clone>(t: &T) -> T { t.clone() }
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fn main() {
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let i1 = &Cell::new(0);
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let i2 = &Cell::new(1);
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// FIXME (#22405): Replace `Box::new` with `box` here when/if possible.
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let r1 = vec!(Box::new(r { i: i1 }));
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let r2 = vec!(Box::new(r { i: i2 }));
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f(clone(&r1), clone(&r2));
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//~^ ERROR the trait `core::clone::Clone` is not implemented for the type
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//~^^ ERROR the trait `core::clone::Clone` is not implemented for the type
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println!("{:?}", (r2, i1.get()));
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println!("{:?}", (r1, i2.get()));
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}
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