BOOST_PP_ENUM_SHIFTED

The BOOST_PP_ENUM_SHIFTED macro generates a comma-separated, shifted list.

#### Usage

BOOST_PP_ENUM_SHIFTED(count, macro, data)

#### Arguments

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_ENUM_SHIFTED 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 comma-separated sequence:
macro(z, 1, data), ... macro(z, count - 1, data)
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_ENUM_SHIFTED_z.
Previously, this macro could not be used recursively inside BOOST_PP_REPEAT. This limitation no longer exists, as the library can automatically detect the next available repetition depth.

#### See Also

- BOOST_PP_ENUM_SHIFTED_z
- BOOST_PP_LIMIT_REPEAT

#### Requirements

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

#### Sample Code

    #include <boost/preprocessor/repetition/enum.hpp>
    #include <boost/preprocessor/repetition/enum_shifted.hpp>

    #define TYPE(z, n, type) type

    BOOST_PP_ENUM(5, TYPE, int) // expands to int, int, int, int, int
    BOOST_PP_ENUM_SHIFTED(5, TYPE, int) // expands to int, int, int, int

© Copyright Housemarque Oy 2002 © Copyright Paul Mensonides 2002

Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at www.boost.org/LICENSE_1_0.txt)