WeakFunctorA

src/func.rs

@@ -41,6 +41,14 @@ pub trait WeakFunctor {
         Self: 'a;
 }
 
+pub trait WeakFunctorA<'a>: 'a {
+    type Fa<A: 'a>: 'a;
+}
+
+impl<'a, T: 'a + WeakFunctor> WeakFunctorA<'a> for T {
+    type Fa<A: 'a> = T::F<'a, A>;
+}
+
 pub type Wrap<'a, A, T> = <T as WeakFunctor>::F<'a, A>;
 
 /// Rust-specific implementation of [`Functor`], respecting `move` semantics.