mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-01 06:51:58 +00:00
65 lines
1.7 KiB
Rust
65 lines
1.7 KiB
Rust
// compile-flags: --crate-type=lib
|
|
#![feature(const_mut_refs)]
|
|
#![feature(const_precise_live_drops)]
|
|
#![feature(const_swap)]
|
|
#![feature(raw_ref_op)]
|
|
|
|
// Mutable borrow of a field with drop impl.
|
|
pub const fn f() {
|
|
let mut a: (u32, Option<String>) = (0, None); //~ ERROR destructor of
|
|
let _ = &mut a.1;
|
|
}
|
|
|
|
// Mutable borrow of a type with drop impl.
|
|
pub const A1: () = {
|
|
let mut x = None; //~ ERROR destructor of
|
|
let mut y = Some(String::new());
|
|
let a = &mut x;
|
|
let b = &mut y;
|
|
std::mem::swap(a, b);
|
|
std::mem::forget(y);
|
|
};
|
|
|
|
// Mutable borrow of a type with drop impl.
|
|
pub const A2: () = {
|
|
let mut x = None;
|
|
let mut y = Some(String::new());
|
|
let a = &mut x;
|
|
let b = &mut y;
|
|
std::mem::swap(a, b);
|
|
std::mem::forget(y);
|
|
let _z = x; //~ ERROR destructor of
|
|
};
|
|
|
|
// Shared borrow of a type that might be !Freeze and Drop.
|
|
pub const fn g1<T>() {
|
|
let x: Option<T> = None; //~ ERROR destructor of
|
|
let _ = x.is_some();
|
|
}
|
|
|
|
// Shared borrow of a type that might be !Freeze and Drop.
|
|
pub const fn g2<T>() {
|
|
let x: Option<T> = None;
|
|
let _ = x.is_some();
|
|
let _y = x; //~ ERROR destructor of
|
|
}
|
|
|
|
// Mutable raw reference to a Drop type.
|
|
pub const fn address_of_mut() {
|
|
let mut x: Option<String> = None; //~ ERROR destructor of
|
|
&raw mut x;
|
|
|
|
let mut y: Option<String> = None; //~ ERROR destructor of
|
|
std::ptr::addr_of_mut!(y);
|
|
}
|
|
|
|
// Const raw reference to a Drop type. Conservatively assumed to allow mutation
|
|
// until resolution of https://github.com/rust-lang/rust/issues/56604.
|
|
pub const fn address_of_const() {
|
|
let x: Option<String> = None; //~ ERROR destructor of
|
|
&raw const x;
|
|
|
|
let y: Option<String> = None; //~ ERROR destructor of
|
|
std::ptr::addr_of!(y);
|
|
}
|