How can I make the map::find operation case insensitive?

Question

Does the map::find method support case insensitive search? I have a map as follows:

map > directory;
<         


        

Answer 1

You can instantiate std::map with three parameters: type of keys, type of values, and comparison function -- a strict weak ordering (essentially, a function or functor behaving like operator< in terms of transitivity and anti-reflexivity) of your liking. Just define the third parameter to do "case-insensitive less-than" (e.g. by a < on the lowercased strings it's comparing) and you'll have the "case-insensitive map" you desire!