Re: [Boost-users] BOOST_FOREACH and maps

From: Sebastian Redl (sebastian.redl_at_[hidden])
Date: 2006-09-18 15:14:43

On Mon, September 18, 2006 12:52 pm, Rob Caldecott wrote:

> Can the pair be declared without a typedef?  Is this a limitation of the
> MS
> compiler?

It is a limitation of the preprocessor. It does not recognize <> as any
sort of parentheses, so it thinks the , separating the template parameters
is a macro argument separator.

You can try wrapping the whole argument in parentheses:
BOOST_FOREACH((std::pair<int, int> p), m)

But I'm not sure if the PP passes the parentheses on - in that case, you
might get syntax errors in the generated code. If that's the case, you'll
have to use the typedef.