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