7c00d77e8b
Part of issue #16640. I am leaving this issue open to handle parsing of higher-rank lifetimes in traits. This change breaks code that used unboxed closures: * Instead of `F:|&: int| -> int`, write `F:Fn(int) -> int`. * Instead of `F:|&mut: int| -> int`, write `F:FnMut(int) -> int`. * Instead of `F:|: int| -> int`, write `F:FnOnce(int) -> int`. [breaking-change]
30 lines
880 B
Rust
30 lines
880 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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#![feature(overloaded_calls)]
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fn a<F:Fn(int, int) -> int>(mut f: F) {
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let g = &mut f;
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f(1, 2); //~ ERROR cannot borrow `f` as immutable
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//~^ ERROR cannot borrow `f` as immutable
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}
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fn b<F:FnMut(int, int) -> int>(f: F) {
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f(1, 2); //~ ERROR cannot borrow immutable argument
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}
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fn c<F:FnOnce(int, int) -> int>(f: F) {
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f(1, 2);
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f(1, 2); //~ ERROR use of moved value
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}
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fn main() {}
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