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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/transmute/transmute-from-fn-item-types-error.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/transmute/transmute-from-fn-item-types-error.rs')
-rw-r--r-- | src/test/ui/transmute/transmute-from-fn-item-types-error.rs | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/src/test/ui/transmute/transmute-from-fn-item-types-error.rs b/src/test/ui/transmute/transmute-from-fn-item-types-error.rs new file mode 100644 index 000000000..f858a199e --- /dev/null +++ b/src/test/ui/transmute/transmute-from-fn-item-types-error.rs @@ -0,0 +1,60 @@ +use std::mem; + +unsafe fn foo() -> (i8, *const (), Option<fn()>) { + let i = mem::transmute(bar); + //~^ ERROR cannot transmute between types of different sizes, or dependently-sized types + + + let p = mem::transmute(foo); + //~^ ERROR can't transmute zero-sized type + + + let of = mem::transmute(main); + //~^ ERROR can't transmute zero-sized type + + + (i, p, of) +} + +unsafe fn bar() { + // Error as usual if the resulting type is not pointer-sized. + mem::transmute::<_, u8>(main); + //~^ ERROR cannot transmute between types of different sizes, or dependently-sized types + + + mem::transmute::<_, *mut ()>(foo); + //~^ ERROR can't transmute zero-sized type + + + mem::transmute::<_, fn()>(bar); + //~^ ERROR can't transmute zero-sized type + + + // No error if a coercion would otherwise occur. + mem::transmute::<fn(), usize>(main); +} + +unsafe fn baz() { + mem::transmute::<_, *mut ()>(Some(foo)); + //~^ ERROR can't transmute zero-sized type + + + mem::transmute::<_, fn()>(Some(bar)); + //~^ ERROR can't transmute zero-sized type + + + mem::transmute::<_, Option<fn()>>(Some(baz)); + //~^ ERROR can't transmute zero-sized type + + + // No error if a coercion would otherwise occur. + mem::transmute::<Option<fn()>, usize>(Some(main)); +} + +fn main() { + unsafe { + foo(); + bar(); + baz(); + } +} |