Re: [Boost-users] some problems about shared_ptr

AMDG Samurai Deeper wrote:

I am a newbie of C++ and I have some question about the shared_ptr I think the best way to explain it is with an example:

/*******beginning of CValue.h*************/ <snip> /****end*************/

/*****Type.h***********/

<snip>

template struct Type { typedef boost::shared_ptr< Value<T> > pValue; };

What is the point of Type? It appears to be gratuitous complexity to me.

/********end************/

what if I want to make it as a composition class?

What do you mean by a composition class?

by example

/***************example**********/ #include "Type.h" #include "CValue.h"

template<typename T> class DIP //digital image processing { public: DIP(); virtual ~DIP(); shared_ptr < Type >createMediumFilter(); };

What is filter here? Also, did you mean the Type::pValue, aka shared_ptr?

<snip> /*****************end**************/

I want to create the instance of mediumFilter like this in the main function

int main() { Type::pValue C(new Composition

...

);

Type::pValue D; D = C->createCValue();

cout<<"system pause"<

how could I fix the problems

I've read through this several times, and I'm afraid that I don't understand what you're trying to do. In Christ, Steven Watanabe