From d3a0e7c306d0645dab8257389343a2e826b2dbe6 Mon Sep 17 00:00:00 2001
From: Tyler Dauwalder <tylerdauwalder@nowhere.fake>
Date: Mon, 23 Jun 2003 05:56:09 +0000
Subject: [PATCH] General object constructor class

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3623 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 headers/private/kernel/util/Constructor.h | 76 +++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 headers/private/kernel/util/Constructor.h

diff --git a/headers/private/kernel/util/Constructor.h b/headers/private/kernel/util/Constructor.h
new file mode 100644
index 0000000000..32fc276014
--- /dev/null
+++ b/headers/private/kernel/util/Constructor.h
@@ -0,0 +1,76 @@
+#ifndef _CONSTRUCTOR_H_
+#define _CONSTRUCTOR_H_
+
+#include <new>
+
+template <class DataType>
+class Constructor {
+public:
+	typedef DataType* Pointer;
+	typedef const DataType* ConstPointer;
+	typedef DataType& Reference;
+	typedef const DataType& ConstReference;
+	
+	/*! Constructs the object pointed to by \a object via a
+		zero-parameter constructor.
+	*/
+	inline
+	void Construct(Pointer object) {
+		if (object)
+			new(reinterpret_cast<void*>(object)) DataType();
+	}
+	
+	/*! Constructs the object pointed to by \a object via a
+		one-parameter constructor using the given argument.
+	*/
+	template <typename ArgType1>
+	inline
+	void Construct(Pointer object, ArgType1 arg1) {
+		if (object)
+			new(reinterpret_cast<void*>(object)) DataType(arg1);
+	}
+	
+	/*! Constructs the object pointed to by \a object via a
+		two-parameter constructor using the given arguments.
+	*/
+	template <typename ArgType1, typename ArgType2>
+	inline
+	void Construct(Pointer object, ArgType1 arg1, ArgType2 arg2) {
+		if (object)
+			new(reinterpret_cast<void*>(object)) DataType(arg1, arg2);
+	}
+	
+	/*! Constructs the object pointed to by \a object via a
+		three-parameter constructor using the given arguments.
+	*/
+	template <typename ArgType1, typename ArgType2, typename ArgType3>
+	inline
+	void Construct(Pointer object, ArgType1 arg1, ArgType2 arg2, ArgType3 arg3) {
+		if (object)
+			new(reinterpret_cast<void*>(object)) DataType(arg1, arg2, arg3);
+	}
+	
+	/*! Constructs the object pointed to by \a object via a
+		four-parameter constructor using the given arguments.
+	*/
+	template <typename ArgType1, typename ArgType2, typename ArgType3,
+	          typename ArgType4>
+	inline
+	void Construct(Pointer object, ArgType1 arg1, ArgType2 arg2, ArgType3 arg3,
+	               ArgType4 arg4) {
+		if (object)
+			new(reinterpret_cast<void*>(object)) DataType(arg1, arg2, arg3, arg4);
+	}	
+
+	/*! Calls the destructor for the object pointed to be \a object.
+	*/
+	inline
+	void Destruct(Pointer object) {
+		if (object)
+			object->~DataType();
+	}
+
+
+};
+
+#endif	// _CONSTRUCTOR_H_