BOOST_PP_LIST_FOR_EACH_R

Boost , ,

Usage

Arguments

r

The next available BOOST_PP_FOR repetition.

macro

A ternary macro of the form macro(r, data, elem).  This macro is expanded by BOOST_PP_LIST_FOR_EACH with each element in list.  It is expanded with the next available BOOST_PP_FOR repetition, the auxiliary data, and the current element.

data

Auxiliary data passed to macro.

list

The list for which macro will be invoked on each element.

Remarks

See Also

• BOOST_PP_LIST_FOR_EACH

Requirements

Sample Code

#include <boost/preprocessor/list/adt.hpp>
#include <boost/preprocessor/list/for_each.hpp>
#include <boost/preprocessor/repetition/for.hpp>
#define LIST (x, (y, (z, BOOST_PP_NIL)))
#define MACRO_2(r, data, elem) elem
#define PRED(r, state) BOOST_PP_LIST_IS_CONS(state)
#define OP(r, state) BOOST_PP_LIST_REST(state)
#define MACRO(r, state) [ BOOST_PP_LIST_FOR_EACH_R(r, MACRO_2, _, state) ]
BOOST_PP_FOR(LIST, PRED, OP, MACRO)
   // expands to [x y z] [y z] [z]

Статья BOOST_PP_LIST_FOR_EACH_R раздела может быть полезна для разработчиков на c++ и boost.

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