40 lines
989 B
Rust
40 lines
989 B
Rust
|
//@ revisions: current next
|
||
|
|
//@[next] compile-flags: -Znext-solver
|
||
|
|
|
||
|
|
// If we don't treat `impl Sized` as rigid, the first call would
|
||
|
|
// resolve to the trait method, constraining the opaque, while the
|
||
|
|
// second call would resolve to the inherent method.
|
||
|
|
//
|
||
|
|
// We avoid cases like this by rejecting candidates which constrain
|
||
|
|
// opaque types encountered in the autoderef chain.
|
||
|
|
//
|
||
|
|
// FIXME(-Znext-solver): ideally we would note that the inference variable
|
||
|
|
// is an opaque type in the error message and change this to a type annotations
|
||
|
|
// needed error.
|
||
|
|
|
||
|
|
trait Trait: Sized {
|
||
|
|
fn method(self) {}
|
||
|
|
}
|
||
|
|
impl Trait for &Foo {}
|
||
|
|
|
||
|
|
struct Foo;
|
||
|
|
impl Foo {
|
||
|
|
fn method(&self) {}
|
||
|
|
}
|
||
|
|
|
||
|
|
fn define_opaque(b: bool) -> impl Sized {
|
||
|
|
if b {
|
||
|
|
let x = &define_opaque(false);
|
||
|
|
x.method();
|
||
|
|
//~^ ERROR no method named `method` found for reference
|
||
|
|
x.method();
|
||
|
|
//~^ ERROR no method named `method` found for reference
|
||
|
|
}
|
||
|
|
|
||
|
|
Foo
|
||
|
|
}
|
||
|
|
|
||
|
|
fn main() {
|
||
|
|
define_opaque(true);
|
||
|
|
}
|