Add caseSensitiveCompareStrings and manual <=> and == operator for CacheKey

MacOS clang compiler does not implement a default <=> operator for string

1 files changed, 23 insertions, 0 deletions

diff --git a/zencore/include/zencore/string.h b/zencore/include/zencore/string.h
index 012ee73ee..fe838ac19 100644
--- a/zencore/include/zencore/string.h
+++ b/zencore/include/zencore/string.h
@@ -9,6 +9,7 @@
 #include <string.h>
 #include <charconv>
 #include <codecvt>
+#include <compare>
 #include <concepts>
 #include <optional>
 #include <span>
@@ -795,6 +796,28 @@ StrCaseCompare(const char* Lhs, const char* Rhs, int64_t Length = -1)
 #endif
 }
 
+/**
+ * @brief
+ * Helper function to implement case sensitive spaceship operator for strings.
+ * MacOS clang version we use does not implement <=> for std::string
+ * @param Lhs string
+ * @param Rhs string
+ * @return std::strong_ordering indicating relationship between Lhs and Rhs
+ */
+inline auto
+caseSensitiveCompareStrings(const std::string& Lhs, const std::string& Rhs)
+{
+	if (Lhs == Rhs)
+	{
+		return std::strong_ordering::equal;
+	}
+	if (Lhs < Rhs)
+	{
+		return std::strong_ordering::less;
+	}
+	return std::strong_ordering::greater;
+}
+
 //////////////////////////////////////////////////////////////////////////
 
 /**