id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
3859,[Boost.utility],achinkoff@…,No-Maintainer,"Having considered [http://www.research.ibm.com/designpatterns/pubs/ph-jun96.txt] 
I propose singleton implementation. 

I had attached ""singleton.hpp"" to this letter.

Below is the test program:


{{{
#include <stdio.h>
#include <singleton.hpp>

class A : public boost::Singleton<A>
{
	//
	// Only Singleton class can create and delete us!
	//
	SINGLETON_IS_MY_FRIEND;
public:
	void foo(){ printf(""foo!\n""); }
	A(){ printf(""A()\n""); }
	~A(){ printf(""~A()\n""); }
};

void main()
{
	// It is not compiled:
	//A a = A::Instance();
	// That is exactly as it should be used:
	A::Instance().foo();
}
}}}


Test program outputs:

{{{
A()
foo!
~A()
}}}


I suggest include ""singleton.hpp"" into ""utility.hpp"" header that it can be used along with: boost::noncopyable, etc.",Feature Requests,closed,Boost 1.42.0,utility,Boost 1.41.0,Optimization,wontfix,,