[Boost-users] metafunction question

Subject: [Boost-users] metafunction question
From: John Dlugosz (JDlugosz_at_[hidden])
Date: 2010-05-11 14:30:08

A co-worker mentioned an interesting issue.  I thought some metaprogramming, or at least more advanced insight into STL, might apply here.

Consider a class derived from an STL collection.  It features a special find(x) function that works with his search criteria.  It returns an iterator into the collection.  There are two forms needed:
        iterator find(x);
        const_iterator find(x) const;
and the annoying part is that they contain exactly the same code.  The implementation uses the inherited iterators and collection features to do the finding.

The larger question is, is there a better way to approach that?

The immediate question is, my thought of using a template helper requires the return type to be determined based on the constness of the incoming parameter for the collection type.  Is there a handy metafunction for that already in existance?

--John



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