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Expand test to cover type_name and monomorphic use
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// 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. | ||
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#![feature(const_type_id)] | ||
#![feature(const_type_name)] | ||
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use std::any::{self, TypeId}; | ||
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pub struct GetTypeId<T>(T); | ||
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impl<T: 'static> GetTypeId<T> { | ||
pub const VALUE: TypeId = TypeId::of::<T>(); | ||
} | ||
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const fn check_type_id<T: 'static>() -> bool { | ||
matches!(GetTypeId::<T>::VALUE, GetTypeId::<usize>::VALUE) | ||
} | ||
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pub struct GetTypeNameLen<T>(T); | ||
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impl<T: 'static> GetTypeNameLen<T> { | ||
pub const VALUE: usize = any::type_name::<T>().len(); | ||
} | ||
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const fn check_type_name_len<T: 'static>() -> bool { | ||
matches!(GetTypeNameLen::<T>::VALUE, GetTypeNameLen::<usize>::VALUE) | ||
} | ||
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fn main() { | ||
assert!(check_type_id::<usize>()); | ||
assert!(check_type_name_len::<usize>()); | ||
} |
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error: could not evaluate constant pattern | ||
--> $DIR/issue-73976-polymorphic.rs:20:37 | ||
| | ||
LL | matches!(GetTypeId::<T>::VALUE, GetTypeId::<T>::VALUE) | ||
| ^^^^^^^^^^^^^^^^^^^^^ | ||
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error: could not evaluate constant pattern | ||
--> $DIR/issue-73976-polymorphic.rs:32:42 | ||
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LL | matches!(GetTypeNameLen::<T>::VALUE, GetTypeNameLen::<T>::VALUE) | ||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ | ||
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error: could not evaluate constant pattern | ||
--> $DIR/issue-73976-polymorphic.rs:20:37 | ||
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LL | matches!(GetTypeId::<T>::VALUE, GetTypeId::<T>::VALUE) | ||
| ^^^^^^^^^^^^^^^^^^^^^ | ||
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error: could not evaluate constant pattern | ||
--> $DIR/issue-73976-polymorphic.rs:32:42 | ||
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LL | matches!(GetTypeNameLen::<T>::VALUE, GetTypeNameLen::<T>::VALUE) | ||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ | ||
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error: aborting due to 4 previous errors | ||
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