Phoenix has complete wrapper for std algorithm using range. It uses a functional programming style so the syntax is a bit different but not much. In your case the code would look like this :

V_INT::iterator it = boost::phoenix::find_if(_1, std::bind2nd(std::equal_to<int>(), 2))(v);

you can read phoenix documentation at BOOST_ROOT/libs/spirit/phoenix/index.html
--- Pada Jum, 30/1/09, Kirk Korver <kkorver@control4.com> menulis:
Dari: Kirk Korver <kkorver@control4.com>
Topik: [Boost-users] Do "entire range" standard algorithms already exist
Kepada: boost-users@lists.boost.org
Tanggal: Jumat, 30 Januari, 2009, 11:19 PM

Group,

I recently found the boost::range library. It seems very useful.

An annoyance that I have with STL algorithms is that they are very verbose. Most of the time I need to do something over the entire range. I'm sure I'm not alone here.

 

At any rate, I can easily do this:

  

template< typename Range, typename Pred >
inline typename boost::range_iterator<Range>::type
find_if( Range& c, Pred pred )
{
    return std::find_if( boost::begin( c ), boost::end( c ), pred );
}

 

Which then allows me to do this:

 

void foo()

{

    typedef std::vector <int> V_INT;
    V_INT v;
    v.push_back(1);
    v.push_back(2);
    v.push_back(3);

 

    V_INT::iterator it = find_if(v, std::bind2nd(std::equal_to<int>(), 2));

}

 

Perfect. Exactly what I want. Search the entire vector, and I give it a predicate.

 

I could easily create these functions for copy_if, erase_if, find_if, and for_each.

 

My question:

Do I need to go ahead and create the tiny wrapper functions, or do they already exist somewhere in Boost? If they exist already, I prefer to use those.

 

Thank you in advance,

Kirk

 

_______________________________________________
Boost-users mailing list
Boost-users@lists.boost.org
http://lists.boost.org/mailman/listinfo.cgi/boost-users


Apakah wajar artis ikut Pemilu?
Temukan jawabannya di Yahoo! Answers!