[Boost-users] Overloading boost::for_each()

Subject: [Boost-users] Overloading boost::for_each()
From: Jeremiah Willcock (jewillco_at_[hidden])
Date: 2010-08-28 16:58:34

There are several container types (such as typical deque implementations, 
if you have access to their internals) that can have for_each() 
implemented for them in a way that is faster than using iterators and a 
generic for_each() function.  Is there a way to take advantage of that in 
Boost.Range, such as by overloading boost::for_each()?  Is there some kind 
of Iterable concept that doesn't require actual iterators or allows them 
to be slow?  Would it be worthwhile to add one?  Are there any other 
techniques that would be useful instead, such as always calling for_each() 
unqualified in my code and using ADL to find custom versions (like is done 
for swap)?  I am not interested in making Boost.Range algorithms use this 
new concept, but there are places in my own code that could use for_each() 
rather than explicit loops if that was faster.  Thank you for any answers 
or advice.

-- Jeremiah Willcock