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Fix size trait detection for containers

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This commit is contained in:
Orfeas Zafeiris 2018-07-23 17:50:50 +03:00
parent e3ff28f58d
commit 4c7a8663b5
1 changed files with 16 additions and 1 deletions
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17
sol/container_traits.hpp
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@ -340,6 +340,21 @@ namespace sol {
static const bool value = sizeof(test<T>(0)) == sizeof(char); static const bool value = sizeof(test<T>(0)) == sizeof(char);
}; };
template <typename T>
struct has_traits_size_test {
private:
typedef std::array<char, 1> one;
typedef std::array<char, 2> two;
template <typename C>
static one test(decltype(&C::size));
template <typename C>
static two test(...);
public:
static const bool value = sizeof(test<T>(0)) == sizeof(char);
};
template <typename T> template <typename T>
using has_clear = meta::boolean<has_clear_test<T>::value>; using has_clear = meta::boolean<has_clear_test<T>::value>;
@ -383,7 +398,7 @@ namespace sol {
using has_traits_add = meta::boolean<has_traits_add_test<T>::value>; using has_traits_add = meta::boolean<has_traits_add_test<T>::value>;
template <typename T> template <typename T>
using has_traits_size = meta::has_size<T>; using has_traits_size = meta::boolean<has_traits_size_test<T>::value>;
template <typename T> template <typename T>
using has_traits_clear = has_clear<T>; using has_traits_clear = has_clear<T>;