Boost logo

Boost :

From: John Maddock (john_at_[hidden])
Date: 2007-08-25 11:32:37

Peter Dimov wrote:
> John Maddock:
>> Is the proposal here: a
>> viable way of fixing the pesky gcc warnings from BOOST_WORKAROUND?
> It works for me.

That was my first thought, however, on reflection it looks fragile: with
this change BOOST_WORKAROUND when applied to an unknown pp-symbol will
always silently return 0, which isn't what we want to have happen :-(

What if we reverse the logic a little:

# define BOOST_WORKAROUND(symbol, test) \
(0 == (BOOST_WORKAROUND_GUARD_ ## symbol) && \
(symbol != 0) && (1 % (( (symbol test) ) + 1)))

Which (I hope!) has no change to current behaviour if
BOOST_WORKAROUND_GUARD_ ## symbol is not defined.

Then for common pp-symbols we add:


And hopefully the warnings get suppressed: at least in the common cases.


Boost list run by bdawes at, gregod at, cpdaniel at, john at