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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/const-generics/const-argument-if-length.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/const-generics/const-argument-if-length.rs')
-rw-r--r-- | src/test/ui/const-generics/const-argument-if-length.rs | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/test/ui/const-generics/const-argument-if-length.rs b/src/test/ui/const-generics/const-argument-if-length.rs new file mode 100644 index 000000000..db1eafca2 --- /dev/null +++ b/src/test/ui/const-generics/const-argument-if-length.rs @@ -0,0 +1,22 @@ +// revisions: full min + +#![cfg_attr(full, feature(generic_const_exprs))] +#![cfg_attr(full, allow(incomplete_features))] + +pub const fn is_zst<T: ?Sized>() -> usize { + if std::mem::size_of::<T>() == 0 { + 1 + } else { + 0 + } +} + +pub struct AtLeastByte<T: ?Sized> { + value: T, + //~^ ERROR the size for values of type `T` cannot be known at compilation time + pad: [u8; is_zst::<T>()], + //[min]~^ ERROR generic parameters may not be used in const operations + //[full]~^^ ERROR unconstrained generic constant +} + +fn main() {} |