Re: [Boost-users] [boost-users] [assign] std::vector initialisation by boost::assign::list_of

Subject: Re: [Boost-users] [boost-users] [assign] std::vector initialisation by boost::assign::list_of
From: Ovanes Markarian (om_boost_at_[hidden])
Date: 2010-03-17 08:52:34

Sorry, it must be to_container() and not to_adapter().

On Wed, Mar 17, 2010 at 1:51 PM, Ovanes Markarian <om_boost_at_[hidden]>wrote:

>
> On Wed, Mar 17, 2010 at 1:32 PM, Andrey Torba <andreytorba_at_[hidden]>wrote:
>
>> The code is compilable on msvc but is not on gcc-4.3:
>>
>> But the problem occurs when i try to initialise std::vector in a class
>> initialization list:
>> class sss
>> {
>>   std::vector<int> v;
>>    sss()
>>     : v(boost::assign::list_of(1)(2))
>>   {}
>> };
>>
>> What happens if you call:
> sss()
>     : v(boost::assign::list_of(1)(2).to_adapter())
>   {}
>
> list_of implements 2 members:
> implicit conversion opertor to the container type and the to_adapter
> member. You can cast list_of instance to your vector<int> if that with
> adapter does not work. Other solution can be:
>
> If you need efficiency, you still can use the vector ctor which reserves
> the number of items in a vector and than copies
> the elements from the list.
>
> sss() : v(2)
> {
>   v = list_of...;
> }
>
> Regards,
> Ovanes
>
>