[Bug preprocessor/36453] PR36320 breaks boost

[tromey at gcc dot gnu dot org]

------- Comment #3 from tromey at gcc dot gnu dot org  2008-07-06 03:25 -------
Sorry, I somehow missed the followup comment.

>> #elif defined(BOOST_PP_ITERATION_DEPTH) && BOOST_PP_ITERATION_DEPTH() == 1

The expression has to be valid after preprocessing.
So, if BOOST_PP_ITERATION_DEPTH is not defined, this will yield an error.

>> it is confusing that #elif behaves more like "#if" and not like "#else\n#if"

I agree, but by my reading this is what the standard actually says.
I am open to arguments contrariwise, or to rulings from gcc developers more
expert at standardese than I.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36453