Re: [Boost-users] Dereferencing value for algorithm

Alexander Shyrokov writes:

An iterator is pointing to a pointer, how do I add another dereferencing operator in the algorithm, so it works on values?

You might try http://www.boost.org/libs/iterator/indirect_iterator.html

void f(int& i); vector a; // this would work if f would be void f(int* i) for_each(a.begin(),a.end(),boost::bind(f,_1));

I could define a dereferencing predicate: template<class T> struct deref{ typedef T result_type; T operator()(T* p){assert(p);return *p;} }; for_each(a.begin(),a.end(),boost::bind(f,boost::bind(deref<int>,_1)));

std::for_each( boost::make_indirect_iterator(a.begin()) , boost::make_indirect_iterator(a.end()) , some_operation ); -- Dave Abrahams Boost Consulting www.boost-consulting.com