[boost] preprocessor

From: David Abrahams (david.abrahams_at_[hidden])
Date: 2002-04-11 11:58:38

Given the presence of BOOST_PP_ENUM_PARAMS, which generates a list like:

    a0, a1, a2, a3, ... aN

it seems there should also be a way to generate:

    T0 a0, T1 a1, T2 a2, ... TN aN

built into the library.

  #define BOOST_PP_NUMBER_PAIR(Index, Pair)           \
    BOOST_PP_CAT(BOOST_PP_TUPLE_ELEM(2,0,Pair),Index) \
    BOOST_PP_CAT(BOOST_PP_TUPLE_ELEM(2,1,Pair),Index)

  #define BOOST_PP_ENUM_PARAMS2(N, Pair) BOOST_PP_ENUM(N,
BOOST_PP_NUMBER_PAIR, Pair)

Thoughts?

+---------------------------------------------------------------+
                  David Abrahams
      C++ Booster (http://www.boost.org)               O__  ==
      Pythonista (http://www.python.org)              c/ /'_ ==
  resume: http://users.rcn.com/abrahams/resume.html  (*) \(*) ==
          email: david.abrahams_at_[hidden]
+---------------------------------------------------------------+