flatten 20260225

tjp/core/in_place/InPlace.h

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+// TJP COPYRIGHT HEADER
+
+// draft
+
+#pragma once
+
+#include <tjp/core/types/Types.h>
+
+namespace tjp {
+namespace core {
+
+template<typename T, size_t size, size_t alignment>
+struct InPlace
+{
+	struct Value {
+		char memory [size];
+	} __attribute__ ((aligned (alignment)));
+	
+	Value v;
+	
+	T *operator ->()
+	{
+		return (T *)&v.memory;
+	}
+
+	T *operator ->() const
+	{
+		return (const T *)&v.memory;
+	}
+	
+	template<typename ... Args>
+	InPlace(Args&& ... args)
+	{
+		(*this)->T(std::forward<Args>(args)...);
+		static_assert(sizeof(T) == size);
+	}
+	
+	~InPlace ()
+	{
+		(*this)->~T();
+	}
+} ;
+
+} // namespace
+} // namespace
+