ee67e14034
In addition to the `Fn*` family of traits, closures now implement `Copy` (and similarly `Clone`) if all of the captures do.
22 lines
767 B
Rust
22 lines
767 B
Rust
// Copyright 2017 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 closures do not implement `Clone` if their environment is not `Clone`.
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struct S(i32);
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fn main() {
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let a = S(5);
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let hello = move || {
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println!("Hello {}", a.0);
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};
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let hello = hello.clone(); //~ ERROR the trait bound `S: std::clone::Clone` is not satisfied
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}
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