Hi,

The current boost::associative_property_map  interface in boost::property_map does not provide a find() function interface from where we can find a key type from associative map. 

Although the associative property map concept was mainly developed for using boost::get and boost::put function efficiently on unique associative containers (such as std::map), it still does not have any interface for using find() function for searching whether an element exists in a map, My problem is explained below:

I have a map, and I define a associative property map on it. as follows:

I have a template function, named " exists_in " which checks whether a particular key_value, is present in the map  or not. The function is as follows:

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If I call this template function on mymap, it gives me no error:   if( !exists_in ( mymap, key ) ---->   no error 

Now, if I call template function on my_asso_map, it throws an error :  if( !exists_in( my_asso_map, key ) ---->> error

error: âclass boost::associative_property_map<std::map<int, int > >â has no member named âendâ

I understand, my_asso_map just stores the address of mymap and provides get and put efficiently. But there are instances, where I have to search a key in my map. ( for example, if else loop as provided above ). 

I want to hide mymap and just expose my_asso_map to the user and everywhere I want to pass my_asso_map.. I am able to do this except for the find()  function, because of which I had to keep passing my original mymap to the function/ functor and then use exists_in template function. 

Is there any way to implement a find() utility for associative property maps ? If find() interface can be added in library, that would be simply great !

Thanks,