Re: [boost] nested BOOST_FOREACH and -Wshadow

Subject: Re: [boost] nested BOOST_FOREACH and -Wshadow
From: Sebastian Redl (sebastian.redl_at_[hidden])
Date: 2009-02-07 08:04:28

John Bytheway wrote:
> I'd suggest a simpler (from the user perspective) solution would be to
> have BOOST_FOREACH paste __LINE__ into its variable names.  Then the
> problem would only occur if nested BOOST_FOREACHs were used on the same
> line.  Asking users not to do that seems a lot more reasonable than
> asking them not to use -Wshadow or not to use nested BOOST_FOREACHs at all.
>   
I'm pretty sure you'd need a special variant for MS compilers, since
their __LINE__ expansion is not cleanly pasteable. (You can use their
counting macro instead.)

Sebastian