Trait functor::ContravariantOnce [] [src]

pub trait ContravariantOnce<'a, B>: ReParam<B> + Contravariant<'a, B> {
    fn contramap_once<F: 'a + FnOnce(B) -> Self::Param>(
        self,
        _: F
    ) -> Self::Output; }

Required Methods

Implementors