Re: [Boost-users] [bind maybe?] find_if of map mapped_type.

Subject: Re: [Boost-users] [bind maybe?] find_if of map mapped_type.
From: Robert Jones (robertgbjones_at_[hidden])
Date: 2009-06-04 05:48:06

On Thu, Jun 4, 2009 at 10:21 AM, Roman Perepelitsa <
roman.perepelitsa_at_[hidden]> wrote:

> 2009/6/4 Robert Jones <robertgbjones_at_[hidden]>
>
>> If I'm iterating over a map with, say find_if, and my predicate
>> function accepts the mapped_type of the map, is there a mechanism
>> to pick out the pair.second value inline?
>>
>> class C;
>>
>> map< int, C > m;
>>
>> bool pred( const C & );
>>
>> // correct version of this intent.
>> find_if( m.begin( ), m.end( ), pred( second ) );
>>
>
> find_if(m.begin(), m.end(), bind(pred, bind(&map<int,
> c>::value_type::second, _1)))
>

Many thanks Roman - I find these bind incantations a bit like grasping at
smoke, one week
I get familiar with it all, and the next week the syntax just slips away!

- Rob.