[Boost-users] [Iterator] filter_iterator over greedy?

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Hi Folks, Somewhat to my surprise this code, simply creating a filter_iterator, evaluates the predicate until an element satisfying the predicate is found. This seems wrong to me. Shouldn't evaluation of the predicate be delayed until the filter_iterator is dereferenced? Thx, Rob. #include <iostream> #include #include bool predicate( int i ) { std::cout << "predicate(" << i << ")" << std::endl; return true; } int main( ) { int array[] = { 0, 1 }; boost::make_filter_iterator( predicate, boost::begin( array ), boost::end( array ) ); } predicate(0)