...

I have used it for more than 6 months now and have added it to my standard set of idioms. Once you get into the FOREACH mindset, you don't only want to use it for std::for_each type jobs but you would also want to use it for std::transform type ones. In situations where you can use push_back on a result container, FOREACH serves this purpose as it is. However, I have encountered situations where this was not possible and where I wanted a second macro, say FOREACH2, that iterates over 2 ranges simultaneously. I have had such a need on more than one occasion. One situation was as above and in other situations I had to combine the elements of two ranges.

Try using zip_iterator with BOOST_FOREACH.

Thanks for the suggestion Dave, but I am not sure how I would achieve the same as with the BOOST_FOREACH variant that I am suggesting. I am thinking of something like the following: int a1[] = { 1, 2, 3 }; int a2[] = { 4, 5, 6 }; BOOST_FOREACH2(int e1, a1, int& e2, a2) { e2 += e1; } How would I write this with BOOST_FOREACH using zip_iterator? TIA, Sam