Re: [Boost-users] [lambda] Defining a predicate for std::find_if if the key to a std::map is std::pair

Ryan wrote:

On Thu, Sep 24, 2009 at 11:38 AM, Anthony Foglia mailto:AFoglia@princeton.com> wrote:

Or, even easier, make the key just the string and the value a pair of the int and the vector of classA:

On Thu, Sep 24, 2009 at 12:01 PM, Nat Goodspeed mailto:nat@lindenlab.com> wrote:

Yes, that's what I was thinking: migrate the int from the key to the mapped_type.

This would indeed make the insert easier at the cost of complicating the retrieval. By making the int part of the key the retrieval is trival

m_VariableDestinations.find(std::make_pair(name, intValue));

If I was to move the int out of the pair I found that it increased the difficulty quite a bit.

My other thought is: have you looked at all at Boost Multi-Index? http://www.boost.org/doc/libs/1_40_0/libs/multi_index/doc/index.html It may be that your dual key requirements would best be met by dual indexes.