| //@ check-pass | |
| #![allow(forgetting_copy_types)] | |
| use std::mem::forget; | |
| const _: () = forget(0i32); | |
| const _: () = forget(Vec::<Vec<Box<i32>>>::new()); | |
| // Writing this function signature without const-forget | |
| // triggers compiler errors: | |
| // 1) That we use a non-const fn inside a const fn | |
| // 2) without the forget, it complains about the destructor of Box | |
| // | |
| // FIXME: this method cannot be called in const-eval yet, as Box isn't | |
| // const constructable | |
| #[allow(unused)] | |
| const fn const_forget_box<T: ?Sized>(b: Box<T>) { | |
| forget(b); | |
| } | |
| fn main() {} |