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

Subject: [Boost-users] [lambda] Defining a predicate for std::find_if if the key to a std::map is std::pair
From: Ryan McConnehey (mccorywork_at_[hidden])
Date: 2009-09-24 00:09:44

I have the following std::map signature.

typedef std::pair<std::string, int>  cPair;
typedef std::map<cPair, std::vector<classA> >  cMap;
cMap  myMap;

When entering values into the map, the std::string is the only part of 
the key that needs to be unique.  Upon retrieving map values both values 
of the key need to be compared.  I've tried to define my insert 
comparison as follows, but am uncertain how to define the predicate with 
boost::lambda.

std::string givenName = "some_text_value";
int givenInt = 3;
cMap::const_iterator itor = std::find_if( myMap.begin(), myMap.end(), 
boost::lambda::bind( ??? , _1) == givenName );

What goes at the question marks?

Ryan