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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
commit | 218caa410aa38c29984be31a5229b9fa717560ee (patch) | |
tree | c54bd55eeb6e4c508940a30e94c0032fbd45d677 /tests/ui/consts/issue-73976-polymorphic.rs | |
parent | Releasing progress-linux version 1.67.1+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-218caa410aa38c29984be31a5229b9fa717560ee.tar.xz rustc-218caa410aa38c29984be31a5229b9fa717560ee.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/consts/issue-73976-polymorphic.rs')
-rw-r--r-- | tests/ui/consts/issue-73976-polymorphic.rs | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/tests/ui/consts/issue-73976-polymorphic.rs b/tests/ui/consts/issue-73976-polymorphic.rs new file mode 100644 index 000000000..787462da9 --- /dev/null +++ b/tests/ui/consts/issue-73976-polymorphic.rs @@ -0,0 +1,40 @@ +// This test is from #73976. We previously did not check if a type is monomorphized +// before calculating its type id, which leads to the bizarre behaviour below that +// TypeId of a generic type does not match itself. +// +// This test case should either run-pass or be rejected at compile time. +// Currently we just disallow this usage and require pattern is monomorphic. + +#![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::<T>::VALUE) + //~^ ERROR constant pattern depends on a generic parameter + //~| ERROR constant pattern depends on a generic parameter +} + +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::<T>::VALUE) + //~^ ERROR constant pattern depends on a generic parameter + //~| ERROR constant pattern depends on a generic parameter +} + +fn main() { + assert!(check_type_id::<usize>()); + assert!(check_type_name_len::<usize>()); +} |