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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() {} |