Re: [Boost-users] Copying Boost.Array initialization code

Subject: Re: [Boost-users] Copying Boost.Array initialization code
From: Roman Perepelitsa (roman.perepelitsa_at_[hidden])
Date: 2010-12-24 04:36:20

2010/12/23 Joel Falcou <joel.falcou_at_[hidden]>

> On 23/12/10 17:28, Torri, Stephen CIV NSWCDD, W15 wrote:
>
>> I am looking for the code that enables me to do the following with
>> Boost.Array:
>>
>> boost::array<unsigned int,16>  tmp = { { 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2,
>> 2, 1, 1, 1, 1 } };
>>
>> I would like to learn how to do this. I have need to easily initialize a
>> 4x4 grid with data.
>>
>>
> boost array does nothign special. Any class which is defined as a POD type
> (Plain Old Data) supports aggregate construction.
> To make a POD class, all memeber should be POD and public, dont inherit
> from anything and dont provide constructor.

POD != aggregate. An aggregate class is a class with no user-declared
constructors, no private or protected non-static data members, no base
classes, and no virtual functions.

The following type is an aggregate but isn't a POD.

struct a
{
    std::string s;
};

Also, all arrays are aggregates.

Roman Perepelitsa.