1 files changed, 40 insertions, 0 deletions
diff --git a/src/core/string_literal.h b/src/core/string_literal.h
new file mode 100644
index 0000000..d530a54
--- /dev/null
+++ b/src/core/string_literal.h
@@ -0,0 +1,40 @@
+#pragma once
+
+#include <array>
+#include <string_view>
+
+namespace saw {
+/**
+ * Helper object which creates a templated string from the provided string
+ * literal. It guarantees compile time uniqueness and thus allows using strings
+ * in template parameters.
+ */
+template <class CharT, size_t N> class string_literal {
+public:
+	constexpr string_literal(const CharT (&input)[N]) noexcept {
+		for (size_t i = 0; i < N; ++i) {
+			data[i] = input[i];
+		}
+	}
+
+	std::array<CharT, N> data{};
+
+	constexpr std::string_view view() const noexcept {
+		return std::string_view{data.data()};
+	}
+
+	constexpr bool
+	operator==(const string_literal<CharT, N> &) const noexcept = default;
+
+	template <class CharTR, size_t NR>
+	constexpr bool
+	operator==(const string_literal<CharTR, NR> &) const noexcept {
+		return false;
+	}
+};
+
+template <typename T, T... Chars>
+constexpr string_literal<T, sizeof...(Chars)> operator""_key() {
+	return string_literal<T, sizeof...(Chars) + 1u>{Chars..., '\0'};
+}
+} // namespace saw