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add has_resize_method

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ToruNiina
2017-05-06 23:40:28 +09:00
parent 9cb6137974
commit a506dfd3c1
1 changed files with 8 additions and 0 deletions
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8
toml/traits.hpp
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@@ -30,6 +30,12 @@ struct has_mapped_type_impl
template<typename T> static std::true_type check(typename T::mapped_type*);
template<typename T> static std::false_type check(...);
};
struct has_resize_method_impl
{
constexpr static std::size_t dummy=0;
template<typename T> static std::true_type check(decltype(std::declval<T>().resize(dummy))*);
template<typename T> static std::false_type check(...);
};
template<typename T>
struct has_iterator : decltype(has_iterator_impl::check<T>(nullptr)){};
@@ -39,6 +45,8 @@ template<typename T>
struct has_key_type : decltype(has_key_type_impl::check<T>(nullptr)){};
template<typename T>
struct has_mapped_type : decltype(has_mapped_type_impl::check<T>(nullptr)){};
template<typename T>
struct has_resize_method : decltype(has_resize_method_impl::check<T>(nullptr)){};
template<typename T>
struct is_container : std::integral_constant<bool,