Re: [boost] nested BOOST_FOREACH and -Wshadow

Subject: Re: [boost] nested BOOST_FOREACH and -Wshadow
From: Dustin Spicuzza (dustin_at_[hidden])
Date: 2009-02-07 09:28:57

Sebastian Redl wrote:
> 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.)
>   
The line macro is a great idea, definitely far simpler than what I was
suggesting. However, I'm not quite familiar with the MS counting macro...

Dustin

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