[Boost-users] [preprocessor] BOOST_PP_IF with BOOST_PP_SEQ_ENUM as then-argument

From: Maximilian Matthe (Maxi.Matthe_at_[hidden])
Date: 2008-07-16 06:48:16

Hello!

#define seq (int)(int)

BOOST_PP_IF(1, BOOST_PP_SEQ_ENUM(seq), BOOST_PP_EMTPY)

does not expand to what i want: it should be int, int . G++ gives the 
following error:

test.cpp:20:1: macro "BOOST_PP_IIF" passed 4 arguments, but takes just 3
BOOST_PP_IIF

which is logical, because SEQ_ENUM expands to int, int and so if gets 4 
arguments. I tried to surround SEQ_ENUM with IDENTITY but it's the same 
problem. Only surrounding SEQ_ENUM with () works, but then I have the () 
in the code, which I do not want. How can I solve this problem?

Max