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