Re: [boost] Re: container design (Was: std::complex design (Was: N-Dimensional array))

From: Howard Hinnant (hinnant_at_[hidden])
Date: 2002-03-08 12:42:26

On Friday, March 8, 2002, at 12:29  PM, Peter Dimov wrote:

> From: "Howard Hinnant" <hinnant_at_[hidden]>
>> Meanwhile vector<double> v(10, uninitialized_flag) breaks no vector
>> invariants.  The vector is destructible.  The vector elements can be
>> assigned into.  If your hardware doesn't mind (mine doesn't), you can
>> even assign from this uninitialized vector.  I  can't think of a reason
>> why you would want to do that though.
>
> You can't v.insert(v.begin(), 5.0) because copying the uninitialized 
> doubles
> is undefined behavior. The insert() preconditions do not say that you 
> can't.
> Something is wrong. :-)

Does passing the vector a chunk of uninitialized memory solve this 
problem?

-Howard