зеркало из https://github.com/mozilla/gecko-dev.git
a4fa8230aa
Consider the following:
struct Complex<T> {
something: T,
#[compute(field_bound)]
something_else: Generic<Self, T>,
}
That will generate:
impl<T> ToComputedValue for Complex<T>
where
T: ToComputedValue,
Generic<Self, T>: ToComputedValue<ComputedValue = Generic<Self, <T as ToComputedValue>::ComputedValue>>,
{
// ...
}
That last clause is obviously incorrect. map_type_params correctly maps
the T, but it should know also about Self.
Ideally we could just do the same as for T and do:
<Self as ToComputedValue>::ComputedValue
But that doesn't quite work, because we are in that implementation of
the trait, and the compiler rightfully complains about we don't yet
knowing the computed type. So we need to pass it explicitly, which is
simple enough, if a bit annoying.
Differential Revision: https://phabricator.services.mozilla.com/D83816
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