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