Subject: Re: [boost] [smart-ptr][containers] type of the operator index
From: Vicente J. Botet Escriba (vicente.botet_at_[hidden])
Date: 2011-12-04 13:15:46
Le 04/12/11 18:14, Peter Dimov a écrit :
> Olaf van der Spek wrote:
>> On Sun, Dec 4, 2011 at 5:46 PM, Vicente J. Botet Escriba
>> <vicente.botet_at_[hidden]> wrote:
>> > which is the correct type used as index of operator. scoped_array
>> > std::ptrdiff_t. Others containers use std::size_t.
>> If [-1] might be valid, ptrdiff_t makes sense. Otherwise, I'd opt for
> -1 doesn't make sense for scoped_array. It uses ptrdiff_t in order to
> assert that the index is nonnegative. Other containers, knowing its
> size, need not use ptrdiff_t because assert( index < size ) will fire
> when the index is (size_t)-1.
So which will be the type used to to move from a scoped_array to another
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