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trait Trait {}
impl Trait for () {}
fn bad_echo<T>(_t: T) -> T {
"this should not suggest impl Trait" //~ ERROR mismatched types
}
fn bad_echo_2<T: Trait>(_t: T) -> T {
"this will not suggest it, because that would probably be wrong" //~ ERROR mismatched types
}
fn other_bounds_bad<T>() -> T
where
T: Send,
Option<T>: Send,
{
"don't suggest this, because Option<T> places additional constraints" //~ ERROR mismatched types
}
// FIXME: implement this check
trait GenericTrait<T> {}
fn used_in_trait<T>() -> T
where
T: Send,
(): GenericTrait<T>,
{
"don't suggest this, because the generic param is used in the bound." //~ ERROR mismatched types
}
fn main() {}
|
