mirror of https://github.com/rust-lang/rust
41 lines
698 B
Rust
41 lines
698 B
Rust
// Regression test for #30104
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//@ check-pass
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use std::ops::{Deref, DerefMut};
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fn box_two_field(v: &mut Box<(i32, i32)>) {
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let _a = &mut v.0;
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let _b = &mut v.1;
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}
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fn box_destructure(v: &mut Box<(i32, i32)>) {
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let (ref mut _head, ref mut _tail) = **v;
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}
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struct Wrap<T>(T);
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impl<T> Deref for Wrap<T> {
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type Target = T;
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fn deref(&self) -> &T {
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&self.0
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}
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}
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impl<T> DerefMut for Wrap<T> {
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fn deref_mut(&mut self) -> &mut T {
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&mut self.0
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}
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}
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fn smart_two_field(v: &mut Wrap<(i32, i32)>) {
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let _a = &mut v.0;
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let _b = &mut v.1;
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}
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fn smart_destructure(v: &mut Wrap<(i32, i32)>) {
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let (ref mut _head, ref mut _tail) = **v;
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}
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fn main() {}
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