Re: msvc2010 and C++0x vector.data()????

From:

"Alf P. Steinbach" <alfps@start.no>

Newsgroups:

comp.lang.c++

Date:

Fri, 22 Jan 2010 19:31:21 +0100

Message-ID:

<hjcqq1$kp7$1@news.eternal-september.org>

* Alf P. Steinbach:

* Menace Denace:

On Jan 22, 2:27 am, Menace Denace <blaq...@gmail.com> wrote:

Hey guys, as i was just doing some small example programs i came
across an interesting feature apparently only available in the new
Microsoft Visual Studio 2010 Beta. The program is as follows

void p1()
{
        cout<< "Reverse algorithm with STL containers.\n"<<endl;
        vector<char> cvec = make< vector<char> >("This is a vector of
chars!");
        cout<< "Size : " << cvec.size() <<endl;
        reverse( cvec.begin(), cvec.end() );
        cvec.push_back(0);
        cout << cvec.data() <<endl;
        cout<< "New Size : " << cvec.size() <<endl;

}

Id like to know why does this compile? vector does not have a data()
member as far as i know! is this some C++0x feature

Yup.

As I recall C++0x unifies this access thing.

std::string got const and non-const versions of data too, IIRC.

or just an

extension the Microsoft Compiler guys decided to add? Btw this code
will not compile on MSVC2008!

Forgot to add the make implementation, sorry

template < typename container >
container make ( const char s[])
{
return container( &s[0] , &s[strlen(s)] );
}

You can let the second argument be just strlen( s ).

No, you can't.

I'm sorry, don't know exactly what I was thinking there.

There is a subtlety when the inferred argument type is an integral type, then
the first is treated as a count and the second as a value by ?23.1.1/9, but
that's very different.

Cheers, & sorry for mis-information,

- Alf (self-correcting :-) )