Re: [Boost-users] Another generic program that won't compile withpointee, bind, and array

Terry G wrote:

Here's another (simplified) program I can't get to work. I'm trying to write a generic routine that finds the largest element of a sequence. It is assumed that element->size() is defined, as it is for boost::array and std::string. For some reason, the Largest template function works okay for std::strings, but not for boost::arrays. Can you tell me what is wrong?

This is a bug in boost::array, its size() function is static. You can remove the 'static' in your local copy and make it size_type size() const; to match TR1 and the future C++ standard.

template <class InIter> InIter Largest(InIter first, InIter last) { typedef typename boost::pointee<InIter>::type ObjType; InIter largest = std::max_element(first, last, boost::bind(std::lessstd::size_t(), boost::bind(&ObjType::size, _1),

Here: the problem is that &ObjType::size takes no arguments when ObjType is boost::array.

boost::bind(&ObjType::size, _2)) );

You can rewrite this as boost::bind(&ObjType::size, _1) < boost::bind(&ObjType::size, _2) BTW.

return largest; } // Largest