BOOST_PP_REPEAT_z

Boost , ,

Usage

Arguments

z

The next available BOOST_PP_REPEAT dimension.

count

The number of repetitious calls to macro.  Valid values range from 0 to BOOST_PP_LIMIT_REPEAT.

macro

A ternary operation of the form macro(z, n, data).  This macro is expanded by BOOST_PP_REPEAT with the next available repetition depth, the current repetition number, and the auxiliary data argument. 

data

Auxiliary data passed to macro.

Remarks

See Also

• BOOST_PP_CAT
• BOOST_PP_LIMIT_REPEAT
• BOOST_PP_REPEAT
• Макрос с Z-формами повторного входа

Requirements

Sample Code

#include <boost/preprocessor/arithmetic/inc.hpp>
#include <boost/preprocessor/punctuation/comma_if.hpp>
#include <boost/preprocessor/repetition/repeat.hpp>
#define TEXT(z, n, text) BOOST_PP_COMMA_IF(n) text
#define TEMPLATE(z, n, _) \
   BOOST_PP_COMMA_IF(n) \
   template< \
      BOOST_PP_REPEAT_ ## z( \
         BOOST_PP_INC(n), \
         TEXT, class \
      ) \
   > class T ## n \
   /**/
BOOST_PP_REPEAT(3, TEMPLATE, nil)
   /*
   expands to:
      template<class> class T0,
      template<class, class> class T1,
      template<class, class, class> class T2
   */

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

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