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tjp/core/io/OptionalIO.h

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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::io {
+
+template<typename T>
+struct OptionalIO
+{
+	T &v;
+	bool write;
+} ;
+
+template<typename T>
+OptionalIO<T> optional(T &t, bool write=true) { return OptionalIO<T> { t, write }; }
+
+template<typename IO, typename T>
+void io_(IO &io, OptionalIO<T> &t)
+{
+	static_assert(always_false<T>::value, "this should not be dispatched to");
+}
+
+} // namespace