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#ifndef RFL_INTERNAL_STRINGLITERAL_HPP_
#define RFL_INTERNAL_STRINGLITERAL_HPP_
#include <algorithm>
#include <array>
#include <string>
#include <string_view>
namespace rfl {
namespace internal {
/// Normal strings cannot be used as template
/// parameters, but this can. This is needed
/// for the parameters names in the NamedTuples.
template <size_t N>
struct StringLiteral {
constexpr StringLiteral(const auto... _chars) : arr_{_chars..., '\0'} {}
constexpr StringLiteral(const std::array<char, N> _arr) : arr_(_arr) {}
constexpr StringLiteral(const char (&_str)[N]) {
std::copy_n(_str, N, std::data(arr_));
}
/// Returns the value as a string.
std::string str() const { return std::string(string_view()); }
/// Returns the value as a string.
constexpr std::string_view string_view() const {
return std::string_view(std::data(arr_), N - 1);
}
std::array<char, N> arr_{};
};
template <size_t N1, size_t N2>
constexpr inline bool operator==(const StringLiteral<N1>& _first,
const StringLiteral<N2>& _second) {
if constexpr (N1 != N2) {
return false;
}
return _first.string_view() == _second.string_view();
}
template <size_t N1, size_t N2>
constexpr inline bool operator!=(const StringLiteral<N1>& _first,
const StringLiteral<N2>& _second) {
return !(_first == _second);
}
} // namespace internal
} // namespace rfl
#endif
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