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switched functions in frontend/mpl.h to use tinympl #15

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switched functions in frontend/mpl.h to use tinympl #15

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33 changes: 12 additions & 21 deletions frontend/mpl.h
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Original file line number Diff line number Diff line change
@@ -1,36 +1,27 @@
#ifndef mpl_h_included
#define mpl_h_included

template < class T >
class HasMemberType_Permissions
{
private:
using Yes = char[2];
using No = char[1];
#include <tinympl/detection.hpp>
#include <tinympl/reverse.hpp>
#include <tinympl/tuple_as_sequence.hpp>

namespace detail {

template < class U >
static Yes& test ( typename U::Permissions* );
template < typename U >
static No& test ( U* );
template <typename T>
using _has_member_type_Permissions_archetype = typename T::Permissions;

public:
static constexpr bool RESULT = sizeof(test<T>(nullptr)) == sizeof(Yes);
};
} // end namespace detail

template < class T >
struct has_member_type_Permissions
: public std::integral_constant<bool, HasMemberType_Permissions<T>::RESULT>
{ };
: tinympl::is_detected<detail::_has_member_type_Permissions_archetype, T>
{ };

template <int N, class T, class... Args>
template <int N, class... Args>
struct reverse_tuple {
using type_t = typename reverse_tuple<N-1,Args...,T>::type_t;
using type_t = typename tinympl::reverse<std::tuple<Args...>>::type;
};

template <class T, class... Args>
struct reverse_tuple<1, T, Args...> {
using type_t = std::tuple<Args...,T>;
};

#endif