From: Rob Stewart (stewart_at_[hidden])
Date: 2005-07-13 13:15:28
From: Tobias Schwinger <tschwinger_at_[hidden]>
> Jonathan Turkanis wrote:
> > The ability to accommodate these unlikely scenarios has to be balanced against
> > usability. If a test for GCC with major version < 3 has to use "3000000,"
> > chances are good that a test will be misspelled and a needed workaround will not
> > be applied.
> It is possible to put an expression to calculate the 3000000 in this case into a
> #define BOOST_VERSION(major,minor,patchlvl) \
> (major * 1000000 + minor * 1000 + patchlvl)
> #define BOOST_GCC \
> #if BOOST_WORKAROUND(BOOST_GCC,< BOOST_VERSION(3,2,3))
> // ...
It's a nice idea which neatly circumvents the octal problem and
the N digit problem. BOOST_VERSION could be updated at any time
to handle a compiler that used more digits. For now, the
multipliers could be 10000 and 100.
To use BOOST_VERSION, however, all compilers would need a
BOOST_XXX macro that encodes the native version number into a
BOOST_VERSION-compatible number. For GCC, that would be
BOOST_GCC as shown above. For MSVC, it would be more painful,
but still tenable, I think.
-- Rob Stewart stewart_at_[hidden] Software Engineer http://www.sig.com Susquehanna International Group, LLP using std::disclaimer;
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