25 lines
747 B
Rust
25 lines
747 B
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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// Check that `&mut` objects cannot be borrowed twice, just like
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// other `&mut` pointers.
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trait Foo {
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fn f1<'a>(&'a mut self) -> &'a ();
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fn f2(&mut self);
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}
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fn test(x: &mut Foo) {
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let _y = x.f1();
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x.f2(); //~ ERROR cannot borrow `*x` as mutable
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}
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fn main() {}
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