94 return detail::IsFunctorImpl<T> (0);
104 template<
typename T,
typename F>
127 template<typename T, typename F, typename = std::enable_if_t<IsFunctor<T> ()>>
153 template<
typename T,
typename F>
154 auto operator* (
const F& function,
const T& functor) ->
decltype (
Fmap (functor, function))
156 return Fmap (functor, function);
179 template<
typename T,
typename F>
180 auto operator* (
const T& functor,
const F& function) ->
decltype (
Fmap (functor, function))
182 return Fmap (functor, function);
225 if constexpr (std::is_same_v<FmapResult_t<F>, std::optional<Void>>)
231 return { std::invoke (f, *t) };
235 template<
typename L,
typename R>
const L & GetLeft() const
const R & GetRight() const
typename WrapVoidResult< T >::Type WrapVoidResult_t
constexpr bool IsFunctorImpl(int, typename InstanceFunctor< T >::UndefinedTag *=nullptr)
constexpr bool IsFunctor()
Checks whether the given type has a Functor instance for it.
FmapResult_t< T, F > Fmap(const T &functor, const F &function)
Apply the function f to the elements in functor.
auto operator*(const AF &af, const AV &av) -> decltype(GSL(af, av))
typename InstanceFunctor< T >::template FmapResult_t< F > FmapResult_t
The result type of the contents of the functor T mapped by function F.
static FmapResult_t< F > Apply(const Either< L, R > &either, const F &f)
std::optional< detail::WrapVoidResult_t< std::decay_t< std::result_of_t< F(T)> > > > FmapResult_t
static FmapResult_t< F > Apply(const std::optional< T > &t, const F &f)
The Functor class is used for types that can be mapped over.
detail::ImplementationType FmapResult_t
The type of the functor after its elements were mapped by the function F.
static FmapResult_t< F > Apply(const T &functor, const F &function)
Applies the function to the each of the elements inside the functor.
A proper void type, akin to unit (or ()) type in functional languages.