Re: [boost] Addition for shared_ptr

Michael Rutman wrote:

I'd like to propose adding a template function to shared_ptr to allow the automatic testing of a shared_ptr to its raw ptr.

The template is as simple as

template <class T> bool operator==(boost::shared_ptr<T> const & a, T * const & b) { return a.get() == b; }

Here is the case where I need it.

I have a vector<Foo> myFoo.

In a method of Foo I need to see if this instance is in the vector. I want to do this

vector<Foo>::iterator iter = find( myFoo.begin(), myFoo.end(), this );

This is a reasonable suggestion. It turns out that std::find _is_ specified in a way that allows heterogeneous comparisons, although this may be an oversight on the part of the committee and not a design decision. ;-)