On 6 July 2016 at 22:27, Cherotek Music <cherotek@gmail.com> wrote:
Hi,
I'm trying to make a macro chain that expands something like this

A, B, C

into something like this

{"A", create<AFile>}, {"B", create<BFile>}, {"C", create<CFile>}

This is what I have come up with

#define FORMATS A, B, C // Add new formats here
#define SEQ_FORMATS BOOST_PP_VARIADIC_TO_SEQ(FORMATS)
#define ARG_PAIR(s, data, x) {#x, create<x##File>}
#define SEQ_ARG_PAIRS BOOST_PP_SEQ_TRANSFORM(ARG_PAIR, ~, SEQ_FORMATS)
#define ARG_PAIRS BOOST_PP_SEQ_ENUM(SEQ_ARG_PAIRS)

Use BOOST_PP_ENUM with BOOST_PP_SEQ_SIZE and BOOST_PP_SEQ_ELEM instead of BOOST_PP_SEQ_TRANSFORM+BOOST_PP_SEQ_ENUM.