Re: [boost] [Foreach] Proposal to simplify using Boost.Foreach with maps

Subject: Re: [boost] [Foreach] Proposal to simplify using Boost.Foreach with maps
From: Mathias Gaunard (mathias.gaunard_at_[hidden])
Date: 2009-09-14 18:12:30

Chris Purcell wrote:
> As documented in the manual ("Pitfalls"), BOOST_FOREACH is a little
> awkward to use with associative containers.
 > [...]

> There are a few alternatives to my solution that I have seen:
 > [...]

Alternatives you didn't mention:

1) Use TheContainer::value_type instead of std::pair<foo, bar>.

2) Use type deduction to avoid having to provide the type of the 
elements altogether using auto or BOOST_AUTO.

I think your BOOST_FOREACH_PAIR is interesting, but maybe it could be 
generalized to tuples?