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# Boost.Preprocessor

## Reference

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# #include <boost/preprocessor/list/for_each_i.hpp>

## #define BOOST_PP_LIST_FOR_EACH_I(MACRO,DATA,LIST)

Repeats `MACRO(R,DATA,INDEX,BOOST_PP_LIST_AT(LIST,INDEX))` for each INDEX = [0, BOOST_PP_LIST_SIZE(LIST)).

In other words, expands to the sequence:

      MACRO(R,DATA,0,BOOST_PP_LIST_AT(LIST,0))
      MACRO(R,DATA,1,BOOST_PP_LIST_AT(LIST,1))
      ...
      MACRO(R,DATA,BOOST_PP_DEC(BOOST_PP_LIST_SIZE(LIST)),BOOST_PP_LIST_AT(LIST,BOOST_PP_DEC(BOOST_PP_LIST_SIZE(LIST))))

For example,

      #define TEST(R,DATA,INDEX,X) BOOST_PP_CAT(DATA,X)(INDEX);
      BOOST_PP_LIST_FOR_EACH_I(TEST,prefix_,BOOST_PP_TUPLE_TO_LIST(3,(A,B,C)))

expands to:

      prefix_A(0); prefix_B(1); prefix_C(2);

### Uses

- BOOST_PP_FOR() (see for explanation of the R parameter)

## #define BOOST_PP_LIST_FOR_EACH_I_R(R,MACRO,DATA,LIST)

Can be used inside BOOST_PP_FOR().

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Revised

© Copyright Housemarque Oy 2002

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