Re: What to do about Boost libraries which use user-defined macros which are not BOOST_ prefixed

From: Peter Dimov (pdimov_at_[hidden])
Date: 2019-12-16 15:39:35

Niall Douglas wrote:
> What we could decide to do instead is:
>
> #if defined(PHOENIX_LIMIT) && !defined(BOOST_PHOENIX_LIMIT)
> #error In Boost 1.xx PHOENIX_LIMIT was renamed to BOOST_PHOENIX_LIMIT. 
> Please upgrade your code to reflect the new name.
> #endif

If we do this, instead of #error, we should probably use

BOOST_PRAGMA_MESSAGE("...")
#define BOOST_PHOENIX_LIMIT PHOENIX_LIMIT

This will allow us to fix the uses of PHOENIX_LIMIT within Boost without 
breaking user code.