diff options
Diffstat (limited to 'src/function/apply.h')
-rw-r--r-- | src/function/apply.h | 62 |
1 files changed, 11 insertions, 51 deletions
diff --git a/src/function/apply.h b/src/function/apply.h index 8e780e0..21364a8 100644 --- a/src/function/apply.h +++ b/src/function/apply.h @@ -1,43 +1,12 @@ #ifndef TYPEASVALUE_SRC_FUNCTION_APPLY_H_ #define TYPEASVALUE_SRC_FUNCTION_APPLY_H_ -#include <type_traits> +#include "conditional/if.h" -#include "list/list.h" -#include "list/operation/nth.h" +#include "detail/apply.h" namespace tav { -namespace detail { - -struct placeholder_tag { }; - -template <typename Type> -using is_placeholder = tav::Boolean< - std::is_base_of<placeholder_tag, Type>::value ->; - -template <int Index> -struct placeholder : placeholder_tag { }; - -template < - typename Partials, - typename Argument -> -struct resolve_placeholder { - typedef Argument type; -}; - -template < - typename Partials, - int Index -> -struct resolve_placeholder<Partials, placeholder<Index>> { - typedef typename Nth<Size<Index>, Partials>::type type; -}; - -} - typedef detail::placeholder<0> _0; typedef detail::placeholder<1> _1; typedef detail::placeholder<2> _2; @@ -47,24 +16,15 @@ template < template<typename...> class Function, typename... Arguments > -struct Apply { - template <typename... Partials> - using variadic_type = Function< - typename detail::resolve_placeholder< - typename tav::List<Partials...>::type, - Arguments - >::type... - >; - - template <typename Partial> - using single_type = variadic_type<Partial>; - - template <typename Partial0, typename Partial1> - using pair_type = variadic_type<Partial0, Partial1>; - - template <typename Partial0, typename Partial1, typename Partial2> - using triple_type = variadic_type<Partial0, Partial1, Partial2>; -}; +struct Apply : If< + (detail::count_placeholders<Arguments...>::type::value > 2), + detail::apply_variadic<Function, Arguments...>, + typename If< + detail::count_placeholders<Arguments...>::type::value == 2, + detail::apply_pair<Function, Arguments...>, + detail::apply_single<Function, Arguments...> + >::type +>::type { }; } |