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#pragma once
#include "utf_fwd.h"
#include <string>
#include <type_traits>
namespace unicode {
using namespace detail;
// helper traits
template<typename T>
struct is_encoding
{
static const bool value{std::is_empty_v<T>};
};
template<typename T>
inline constexpr bool is_encoding_v {is_encoding<T>::value};
template<typename T>
struct is_container
{
static const bool value{!std::is_empty_v<T>};
};
template<typename T>
inline constexpr bool is_container_v {is_container<T>::value};
template<typename T>
struct is_char
{
static const bool value{std::is_trivial_v<T> && std::is_scalar_v<T> && !std::is_empty_v<T>};
};
template<typename T>
inline constexpr bool is_char_v {is_char<T>::value};
template<typename T>
struct is_utf_encoding
{
static const bool value{std::is_same_v<T, UTF<utf_iterator<typename T::value_type>, utf_back_insert_iterator<typename T::value_type>>>};
};
template<typename T>
inline constexpr bool is_utf_encoding_v {is_utf_encoding<T>::value};
template<typename T>
struct is_utf_8
{
static const bool value{std::is_same_v<T, UTF_8> || (std::is_trivial_v<T> && sizeof(T) == 1)};
};
template<typename T>
inline constexpr bool is_utf_8_v {is_utf_8<T>::value};
template<typename T>
struct is_utf_16
{
static const bool value{std::is_same_v<T, UTF_16> || (std::is_trivial_v<T> && sizeof(T) == 2)};
};
template<typename T>
inline constexpr bool is_utf_16_v {is_utf_16<T>::value};
template<typename T>
struct is_utf_32
{
static const bool value{std::is_same_v<T, UTF_32> || (std::is_trivial_v<T> && sizeof(T) == 4)};
};
template<typename T>
inline constexpr bool is_utf_32_v {is_utf_32<T>::value};
} // namespace unicode
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