ruby--ruby/include/ruby/backward/2/r_cast.h

#ifndef RUBY_BACKWARD2_R_CAST_H                      /*-*-C++-*-vi:se ft=cpp:*/
#define RUBY_BACKWARD2_R_CAST_H
/**
 * @author     Ruby developers <ruby-core@ruby-lang.org>
 * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
 *             Permission  is hereby  granted,  to  either redistribute  and/or
 *             modify this file, provided that  the conditions mentioned in the
 *             file COPYING are met.  Consult the file for details.
 * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
 *             implementation details.   Don't take  them as canon.  They could
 *             rapidly appear then vanish.  The name (path) of this header file
 *             is also an  implementation detail.  Do not expect  it to persist
 *             at the place it is now.  Developers are free to move it anywhere
 *             anytime at will.
 * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
 *             recursively included  from extension  libraries written  in C++.
 *             Do not  expect for  instance `__VA_ARGS__` is  always available.
 *             We assume C99  for ruby itself but we don't  assume languages of
 *             extension libraries.  They could be written in C++98.
 * @brief      Defines old R_CAST
 *
 * Nobody is actively using this macro.
 */
#define R_CAST(st)   (struct st*)
#define RMOVED(obj)  (R_CAST(RMoved)(obj))

#if defined(__GNUC__)
# warning R_CAST and RMOVED are deprecated
#elif defined(_MSC_VER)
# pragma message("warning: R_CAST and RMOVED are deprecated")
#endif
#endif /* RUBY_BACKWARD2_R_CAST_H */