32d0dbd49a
enumerations that implement the `Drop` trait.
This breaks code like:
struct Struct {
f: String,
g: String,
}
impl Drop for Struct { ... }
fn main() {
let x = Struct { ... };
drop(x);
x.f = ...;
}
Change this code to not create partially-initialized structures. For
example:
struct Struct {
f: String,
g: String,
}
impl Drop for Struct { ... }
fn main() {
let x = Struct { ... };
drop(x);
x = Struct {
f: ...,
g: ...,
}
}
Closes #18571.
[breaking-change]
----
(Joint authorship by pcwalton and Ryman; thanks all!)
23 lines
726 B
Rust
23 lines
726 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::mem;
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struct Test { f: usize }
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impl Drop for Test {
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fn drop(&mut self) {}
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}
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fn main() {
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let mut x = (Test { f: 2 }, Test { f: 4 });
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mem::drop(x.0);
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x.0.f = 3;
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//~^ ERROR partial reinitialization of uninitialized structure `x.0`
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}
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