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remove unused mut, restructure the test

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This commit is contained in:
Dodo 2020-03-02 23:43:50 +01:00
parent 5f4af546d4
commit a674e1c88c
1 changed files with 6 additions and 6 deletions
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12
src/libcore/tests/mem.rs
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@ -132,18 +132,18 @@ fn test_discriminant_send_sync() {
#[test]
fn test_const_forget() {
const fn test_const_forget<T>(x: T) {
forget(x);
}
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
const fn const_forget_box<T>(mut x: Box<T>) {
const fn const_forget_box<T>(x: Box<T>) {
forget(x);
}
const _: () = test_const_forget(0i32);
const _: () = test_const_forget(Vec::<Vec<Box<i32>>>::new());
// Call the forget_box at runtime,
// as we can't const-construct a box yet.
const_forget_box(Box::new(0i32));
}