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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/consts/issue-79137-toogeneric.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/consts/issue-79137-toogeneric.rs')
-rw-r--r-- | src/test/ui/consts/issue-79137-toogeneric.rs | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/test/ui/consts/issue-79137-toogeneric.rs b/src/test/ui/consts/issue-79137-toogeneric.rs new file mode 100644 index 000000000..456035458 --- /dev/null +++ b/src/test/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<()>>()); +} |