Re: [boost] explicit shared_ptr(weak_ptr<Y> const & r);

From: John Torjo (john.lists_at_[hidden])
Date: 2004-10-16 08:47:54

Peter Dimov wrote:

> John Torjo wrote:
> 
>> Hi Peter,
>>
>> Just a thought: perhaps this constructor:
>> explicit shared_ptr(weak_ptr<Y> const & r);
>>
>> should be private,
>> and the only way to create a shared_ptr from a weak_ptr is:
>>
>> shared_ptr<T> val = weak->lock();
>>
>> This way, the shared_ptr public constructors will never throw. Users
>> will not make mistakes like this:
>>
>> shared_ptr<T> val = weak;
> 
> 
> This shouldn't compile on a reasonably compliant compiler, because the 
> constructor is explicit.

True, sorry, I meant this:

shared_ptr<T> val(weak);

The point still remains.

Best,
John

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