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tjp/core/containers/ByF.hpp

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+// License: Modified MIT (NON-AI)
+// See the LICENSE file in the root directory for license information.
+// Copyright 2025 Timothy Prepscius
+ 
+#pragma once
+ 
+namespace tjp::core {
+
+template<typename T, typename F>
+struct ByF {
+	typedef bool is_transparent;
+	
+	[[no_unique_address]]
+	F f;
+
+	bool operator() (const T &lhs, const T &rhs) const
+	{
+		return f(lhs) < f(rhs);
+	}
+
+	template<typename R>
+	bool operator() (const T &lhs, const R &rhs) const
+	{
+		return f(lhs) < f(rhs);
+	}
+
+	template<typename R>
+	bool operator() (const R &lhs, const T &rhs) const
+	{
+		return f(lhs) < f(rhs);
+	}
+} ;
+
+}