Re: [boost] [block_ptr] Request for a review manager

Subject: Re: [boost] [block_ptr] Request for a review manager
From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2016-02-09 16:06:06

On Tue, Feb 9, 2016 at 5:02 PM, Peter Dimov <lists_at_[hidden]> wrote:
>>    // do something that allocates from the heap
>>
>>    v.emplace_back( new X );
>>
>> The last line constructs a block_ptr<X> inside the vector's allocated
>> memory, which is on the heap. So the block_ptr goes looking for a previous
>> heap allocation and finds some random one.
>
>
> Ah wait, the last allocation is "new X" here. Hmm.

You can't tell that without seeing X's constructor. It may well be
another allocation that is performed in X().