rust/src/test/ui/traits/impl-evaluation-order.rs
Matthew Jasper 3e31ffda97 Revert change to evaluation order
This change breaks some code and doesn't appear to enable any new code.
2020-12-17 20:16:10 +00:00

39 lines
588 B
Rust

// Regression test for #79902
// Check that evaluation (which is used to determine whether to copy a type in
// MIR building) evaluates bounds from normalizing an impl after evaluating
// any bounds on the impl.
// check-pass
trait A {
type B;
}
trait M {}
struct G<T, U>(*const T, *const U);
impl<T, U> Clone for G<T, U> {
fn clone(&self) -> Self {
G { ..*self }
}
}
impl<T, U> Copy for G<T, U::B>
where
T: A<B = U>,
U: A,
{
}
impl A for () {
type B = ();
}
fn is_m<T: M>(_: T) {}
fn main() {
let x = G(&(), &());
drop(x);
drop(x);
}