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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-79137-toogeneric.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-79137-toogeneric.rs')
-rw-r--r-- | tests/ui/consts/issue-79137-toogeneric.rs | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/tests/ui/consts/issue-79137-toogeneric.rs b/tests/ui/consts/issue-79137-toogeneric.rs new file mode 100644 index 000000000..456035458 --- /dev/null +++ b/tests/ui/consts/issue-79137-toogeneric.rs @@ -0,0 +1,19 @@ +// Test that `variant_count` only gets evaluated once the type is concrete enough. + +#![feature(variant_count)] + +pub struct GetVariantCount<T>(T); + +impl<T> GetVariantCount<T> { + pub const VALUE: usize = std::mem::variant_count::<T>(); +} + +const fn check_variant_count<T>() -> bool { + matches!(GetVariantCount::<T>::VALUE, GetVariantCount::<T>::VALUE) + //~^ ERROR constant pattern depends on a generic parameter + //~| ERROR constant pattern depends on a generic parameter +} + +fn main() { + assert!(check_variant_count::<Option<()>>()); +} |