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From: bs@alice.UucP (Bjarne Stroustrup)
Newsgroups: net.lang.c++
Subject: address of constructor
Message-ID: <5241@alice.uUCp>
Date: Wed, 2-Apr-86 22:34:51 EST
Article-I.D.: alice.5241
Posted: Wed Apr  2 22:34:51 1986
Date-Received: Sat, 5-Apr-86 06:35:06 EST
Organization: Bell Labs, Murray Hill
Lines: 32

> Subject: Address of constructor
> Path: ..!cecil!keith (keith gorlen @ NIH-CSL, Bethesda, MD)
> 
> Is there a way to get the address of a constructor function in C++?

No. Why do you want it? To pass a function that constructs an object?
If so, this trick can be used:

class base { ... };
class x : public base { ... x(int); };
class y : public base { ... y(int); };

typedef base* (*PF)(int);

some_function(PF f) {
	// ...
	base* p = (*f)(2);	// name a new x or y
	// ...
}

base* xtor(int i) { return new x(i); }
base* ytor(int i) { return new y(i); }

another_function()
{
	some_function(&xtor);
	some_function(&ytor);
}

A slightly more elegant version would involve pointers to member functions.
Note that destructors can be virtual so that you don't have to play games
with pointers to functions to get proper cleanup.