| #pragma once |
| |
| #include <cstdint> |
| #include <type_traits> |
| |
| namespace mbgl { |
| |
| template<typename T> |
| constexpr auto underlying_type(T t) -> typename std::underlying_type_t<T> { |
| return typename std::underlying_type_t<T>(t); |
| } |
| |
| template <typename T> struct is_utf16char_like: std::false_type {}; |
| template <typename T> struct is_utf16char_like<const T>: is_utf16char_like<T> {}; |
| template <> struct is_utf16char_like<char16_t>: std::true_type {}; |
| template <> struct is_utf16char_like<wchar_t>: std::true_type {}; |
| template <> struct is_utf16char_like<uint16_t>: std::true_type {}; |
| |
| template <typename T> using is_utf16char_like_pointer = std::integral_constant<bool, std::is_pointer<T>::value |
| && is_utf16char_like<typename std::remove_pointer<T>::type>::value>; |
| |
| template <class OutPointer, class InChar> |
| typename std::enable_if<is_utf16char_like<InChar>::value && is_utf16char_like_pointer<OutPointer>::value, OutPointer>::type utf16char_cast(InChar *in) |
| { |
| return reinterpret_cast<OutPointer>(in); |
| } |
| |
| } // namespace mbgl |
