50728e5245
This converts all of borrowck's `mut` suggestions to a new `mc::ImmutabilityBlame` API instead of the current mix of various hacks. Fixes #35937. Fixes #40823.
35 lines
999 B
Rust
35 lines
999 B
Rust
// Copyright 2015 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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use std::ops::AddAssign;
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struct Int(i32);
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impl AddAssign for Int {
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fn add_assign(&mut self, _: Int) {
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unimplemented!()
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}
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}
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fn main() {
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let mut x = Int(1);
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x //~ error: use of moved value: `x`
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//~^ value used here after move
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//~| note: move occurs because `x` has type `Int`
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+=
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x; //~ value moved here
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let y = Int(2);
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//~^ consider changing this to `mut y`
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y //~ error: cannot borrow immutable local variable `y` as mutable
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//~| cannot borrow
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+=
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Int(1);
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}
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