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// Test that we correctly infer variance for type parameters in
// various types and traits.
#![feature(rustc_attrs)]
#[rustc_variance]
struct TestImm<A, B> { //~ ERROR [A: +, B: +]
x: A,
y: B,
}
#[rustc_variance]
struct TestMut<A, B:'static> { //~ ERROR [A: +, B: o]
x: A,
y: &'static mut B,
}
#[rustc_variance]
struct TestIndirect<A:'static, B:'static> { //~ ERROR [A: +, B: o]
m: TestMut<A, B>
}
#[rustc_variance]
struct TestIndirect2<A:'static, B:'static> { //~ ERROR [A: o, B: 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 [A: o, R: o]
n: Box<dyn Setter<A>+Send>,
m: Box<dyn Getter<R>+Send>,
}
fn main() {}
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