Re: [boost] Addition for shared_ptr

From: Peter Dimov (pdimov_at_[hidden])
Date: 2005-03-31 13:47:41

Michael Rutman wrote:
> At 1:40 PM +0300 9/20/04, Peter Dimov wrote:
>> 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. ;-)
>
> Any chance this can go in for the next release?

<tilts head and ponders for a moment>

Probably not, but not because it's necessarily a bad idea.

I only add extensions to components already in TR1 if I'm reasonably sure 
that I want to (formally) propose this extension for a later version of the 
component (TR2, or C++next). Which in this case I'm not (yet).