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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/mir/mir_fat_ptr.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/mir/mir_fat_ptr.rs')
-rw-r--r-- | src/test/ui/mir/mir_fat_ptr.rs | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/src/test/ui/mir/mir_fat_ptr.rs b/src/test/ui/mir/mir_fat_ptr.rs new file mode 100644 index 000000000..7c3e07c9e --- /dev/null +++ b/src/test/ui/mir/mir_fat_ptr.rs @@ -0,0 +1,52 @@ +// run-pass +// test that ordinary fat pointer operations work. + +struct Wrapper<T: ?Sized>(#[allow(unused_tuple_struct_fields)] u32, T); + +struct FatPtrContainer<'a> { + ptr: &'a [u8] +} + +fn fat_ptr_project(a: &Wrapper<[u8]>) -> &[u8] { + &a.1 +} + +fn fat_ptr_simple(a: &[u8]) -> &[u8] { + a +} + +fn fat_ptr_via_local(a: &[u8]) -> &[u8] { + let x = a; + x +} + +fn fat_ptr_from_struct(s: FatPtrContainer) -> &[u8] { + s.ptr +} + +fn fat_ptr_to_struct(a: &[u8]) -> FatPtrContainer { + FatPtrContainer { ptr: a } +} + +fn fat_ptr_store_to<'a>(a: &'a [u8], b: &mut &'a [u8]) { + *b = a; +} + +fn fat_ptr_constant() -> &'static str { + "HELLO" +} + +fn main() { + let a = Wrapper(4, [7,6,5]); + + let p = fat_ptr_project(&a); + let p = fat_ptr_simple(p); + let p = fat_ptr_via_local(p); + let p = fat_ptr_from_struct(fat_ptr_to_struct(p)); + + let mut target : &[u8] = &[42]; + fat_ptr_store_to(p, &mut target); + assert_eq!(target, &a.1); + + assert_eq!(fat_ptr_constant(), "HELLO"); +} |