46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
#pragma once
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#include <array>
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#include <cstdint>
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#include <type_traits>
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#include <vector>
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namespace mbgl {
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template <typename T>
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constexpr auto underlying_type(T t) -> typename std::underlying_type_t<T> {
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return typename std::underlying_type_t<T>(t);
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}
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template <typename T>
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struct is_utf16char_like : std::false_type {};
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template <typename T>
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struct is_utf16char_like<const T> : is_utf16char_like<T> {};
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template <>
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struct is_utf16char_like<char16_t> : std::true_type {};
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template <>
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struct is_utf16char_like<wchar_t> : std::true_type {};
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template <>
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struct is_utf16char_like<uint16_t> : std::true_type {};
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template <typename T>
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using is_utf16char_like_pointer =
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std::integral_constant<bool, std::is_pointer_v<T> && is_utf16char_like<std::remove_pointer_t<T>>::value>;
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template <class OutPointer, class InChar>
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OutPointer utf16char_cast(InChar *in)
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requires(is_utf16char_like<InChar>::value && is_utf16char_like_pointer<OutPointer>::value)
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{
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return reinterpret_cast<OutPointer>(in);
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}
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template <typename T>
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struct is_linear_container : std::false_type {};
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template <typename T, std::size_t N>
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struct is_linear_container<std::array<T, N>> : std::true_type {};
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template <typename... Ts>
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struct is_linear_container<std::vector<Ts...>> : std::true_type {};
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} // namespace mbgl
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