Matching a generic parameter to an associated type in an impl

by

I must explain to the compiler that B is the same as A::Foo

There is a special syntax for it:

impl<A, B> Baz<A, B>
where
    A: Generator<Foo = B>,
{
    fn add_foo(&mut self) {
        self.vec.push(self.generator.generate());
    }
}

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