j3d1/json
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

make has_mapped_type struct friendly

Browse source
This commit is contained in:
Vladimir Petrigo 2016-10-08 01:03:35 +03:00
parent a0ef5a194c
commit e9fde3e116
2 changed files with 12 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
src/json.hpp
View file

@ -112,10 +112,13 @@ template<typename T>
struct has_mapped_type struct has_mapped_type
{ {
private: private:
template<typename C> static char test(typename C::mapped_type*); template <typename U, typename = typename U::mapped_type>
template<typename C> static char (&test(...))[2]; static int detect(U&&);
static void detect(...);
public: public:
static constexpr bool value = sizeof(test<T>(0)) == 1; static constexpr bool value =
std::is_integral<decltype(detect(std::declval<T>()))>::value;
}; };
/*! /*!

9
src/json.hpp.re2c
View file

@ -112,10 +112,13 @@ template<typename T>
struct has_mapped_type struct has_mapped_type
{ {
private: private:
template<typename C> static char test(typename C::mapped_type*); template <typename U, typename = typename U::mapped_type>
template<typename C> static char (&test(...))[2]; static int detect(U&&);
static void detect(...);
public: public:
static constexpr bool value = sizeof(test<T>(0)) == 1; static constexpr bool value =
std::is_integral<decltype(detect(std::declval<T>()))>::value;
}; };
/*! /*!