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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/const-eval/validate_uninhabited_zsts.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/const-eval/validate_uninhabited_zsts.rs')
-rw-r--r-- | src/test/ui/consts/const-eval/validate_uninhabited_zsts.rs | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/test/ui/consts/const-eval/validate_uninhabited_zsts.rs b/src/test/ui/consts/const-eval/validate_uninhabited_zsts.rs new file mode 100644 index 000000000..96f331275 --- /dev/null +++ b/src/test/ui/consts/const-eval/validate_uninhabited_zsts.rs @@ -0,0 +1,30 @@ +// stderr-per-bitwidth + +const fn foo() -> ! { + unsafe { std::mem::transmute(()) } + //~^ ERROR evaluation of constant value failed + //~| WARN the type `!` does not permit zero-initialization [invalid_value] +} + +// Type defined in a submodule, so that it is not "visibly" +// uninhabited (which would change interpreter behavior). +pub mod empty { + #[derive(Clone, Copy)] + enum Void {} + + #[derive(Clone, Copy)] + pub struct Empty(Void); +} + +#[warn(const_err)] +const FOO: [empty::Empty; 3] = [foo(); 3]; + +#[warn(const_err)] +const BAR: [empty::Empty; 3] = [unsafe { std::mem::transmute(()) }; 3]; +//~^ ERROR it is undefined behavior to use this value +//~| WARN the type `empty::Empty` does not permit zero-initialization + +fn main() { + FOO; + BAR; +} |