BOOST_PP_REPEAT_FROM_TO_2ND

Boost , ,

The BOOST_PP_REPEAT_FROM_TO_2ND macro represents the second dimension of BOOST_PP_REPEAT_FROM_TO.

Usage

BOOST_PP_REPEAT_FROM_TO_2ND(first, last, macro, data)

Arguments

first: The lower bound of the repetition. Valid values range from 0 to BOOST_PP_LIMIT_MAG.
last: The upper bound of the repetition. Valid values range from 0 to BOOST_PP_LIMIT_MAG.
macro: A ternary operation of the form macro(z, n, data). This macro is expanded by BOOST_PP_REPEAT_FROM_TO_2ND with the next available repetition depth, the current repetition number, and the auxiliary data argument.
data: Auxiliary data passed to macro.

Remarks

This macro expands to the sequence:

macro(z, first, data) macro(z, first + 1, data) ... macro(z, last - 1, data)

The number of repetitions (i.e. last - first) must not exceed BOOST_PP_LIMIT_REPEAT.

The z value that is passed to macro represents the next available repetition dimension. Other macros that have _Z suffix variants internally use BOOST_PP_REPEAT--for example, BOOST_PP_ENUM_PARAMS and BOOST_PP_ENUM_PARAMS_Z. Using these _Z versions is not strictly necessary, but passing the z value (that is passed to macro) to these macros allows them to reenter BOOST_PP_REPEAT with maximum efficiency.

To directly use this z value, rather than simply passing it to another macro, see BOOST_PP_REPEAT_FROM_TO_z.

This macro is deprecated. It only exists for backward compatibility. Use BOOST_PP_REPEAT_FROM_TO instead.

Requirements

Header: <boost/preprocessor/repetition/repeat_from_to.hpp>

Sample Code

#include <boost/preprocessor/repetition/repeat_from_to.hpp>
#define MACRO(z, n, data) (n)
BOOST_PP_REPEAT_FROM_TO_2ND(1, 6, MACRO, nil)
   // expands to (1) (2) (3) (4) (5)

Distributed under the Boost Software License, Version 1.0. (См. сопроводительный файл LICENSE_1_0.txt или копия на www.boost.org/LICENSE_1_0.txt)

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2025-05-22 19:21:52/0.003079891204834/0