Add named comparator support.

Utility/NamedComparator.h

@@ -0,0 +1,61 @@
+static_assert( __cplusplus > 2023'00 );
+
+#pragma once
+
+#include <Alepha/Alepha.h>
+
+#include <map>
+#include <functional>
+#include <type_traits>
+
+#include <Alepha/Enum.h>
+
+namespace Alepha::Hydrogen::Utility  ::detail::  NamedComparator_m
+{
+	inline namespace exports
+	{
+		using ComparatorName= Enum
+		<
+			"eq"_value,
+			"ne"_value,
+			"lt"_value,
+			"gt"_value,
+			"le"_value,
+			"ge"_value
+		>;
+	}
+
+	struct comparator
+	{
+		constexpr auto
+		operator () ( const ComparatorName &lhs, const ComparatorName &rhs ) const
+		{
+			return lhs.get_index() < rhs.get_index();
+		}
+	};
+
+	namespace exports
+	{
+		template< typename Type >
+		auto
+		getComparatorMap()
+		{
+			std::map< ComparatorName, std::function< bool ( Type, Type ) >, comparator > rv
+			{
+				{ "eq"_value, std::equal_to<>{} },
+				{ "ne"_value, std::not_equal_to<>{} },
+				{ "lt"_value, std::less<>{} },
+				{ "gt"_value, std::greater<>{} },
+				{ "le"_value, std::less_equal<>{} },
+				{ "ge"_value, std::greater_equal<>{} },
+			};
+
+			return rv;
+		};
+	}
+}
+
+namespace Alepha::Hydrogen::Utility::inline exports::inline NamedComparator_m
+{
+	using namespace detail::NamedComparator_m::exports;
+}