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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/variance/variance-types-bounds.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/variance/variance-types-bounds.rs')
-rw-r--r-- | src/test/ui/variance/variance-types-bounds.rs | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/test/ui/variance/variance-types-bounds.rs b/src/test/ui/variance/variance-types-bounds.rs new file mode 100644 index 000000000..d1814dd97 --- /dev/null +++ b/src/test/ui/variance/variance-types-bounds.rs @@ -0,0 +1,43 @@ +// Test that we correctly infer variance for type parameters in +// various types and traits. + +#![feature(rustc_attrs)] + +#[rustc_variance] +struct TestImm<A, B> { //~ ERROR [+, +] + x: A, + y: B, +} + +#[rustc_variance] +struct TestMut<A, B:'static> { //~ ERROR [+, o] + x: A, + y: &'static mut B, +} + +#[rustc_variance] +struct TestIndirect<A:'static, B:'static> { //~ ERROR [+, o] + m: TestMut<A, B> +} + +#[rustc_variance] +struct TestIndirect2<A:'static, B:'static> { //~ ERROR [o, o] + n: TestMut<A, B>, + m: TestMut<B, A> +} + +trait Getter<A> { + fn get(&self) -> A; +} + +trait Setter<A> { + fn set(&mut self, a: A); +} + +#[rustc_variance] +struct TestObject<A, R> { //~ ERROR [o, o] + n: Box<dyn Setter<A>+Send>, + m: Box<dyn Getter<R>+Send>, +} + +fn main() {} |