| //@ 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; |
| } |
