blob: 7706a97f23b4834bd0c2166e8354c0659ca34f4b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
// check-pass
//
// This test is complement to the test in issue-73976-polymorphic.rs.
// In that test we ensure that polymorphic use of type_id and type_name in patterns
// will be properly rejected. This test will ensure that monomorphic use of these
// would not be wrongly rejected in patterns.
#![feature(const_type_id)]
#![feature(const_type_name)]
use std::any::{self, TypeId};
pub struct GetTypeId<T>(T);
impl<T: 'static> GetTypeId<T> {
pub const VALUE: TypeId = TypeId::of::<T>();
}
const fn check_type_id<T: 'static>() -> bool {
matches!(GetTypeId::<T>::VALUE, GetTypeId::<usize>::VALUE)
}
pub struct GetTypeNameLen<T>(T);
impl<T: 'static> GetTypeNameLen<T> {
pub const VALUE: usize = any::type_name::<T>().len();
}
const fn check_type_name_len<T: 'static>() -> bool {
matches!(GetTypeNameLen::<T>::VALUE, GetTypeNameLen::<usize>::VALUE)
}
fn main() {
assert!(check_type_id::<usize>());
assert!(check_type_name_len::<usize>());
}
|
