mirror of https://github.com/rust-lang/rust
25 lines
573 B
Rust
25 lines
573 B
Rust
//@ compile-flags: --crate-type=lib
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//@ check-pass
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#![feature(const_mut_refs)]
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#![feature(const_precise_live_drops)]
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// Mutable reference allows only mutation of !Drop place.
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pub const fn f() {
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let mut x: (Option<String>, u32) = (None, 0);
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let mut a = 10;
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*(&mut a) = 11;
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x.1 = a;
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}
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// Mutable reference allows only mutation of !Drop place.
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pub const fn g() {
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let mut a: (u32, Option<String>) = (0, None);
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let _ = &mut a.0;
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}
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// Shared reference does not allow for mutation.
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pub const fn h() {
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let x: Option<String> = None;
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let _ = &x;
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}
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