text: #ifndef RBIMPL_ATTR_FORCEINLINE_H                    /*-*-C++-*-vi:se ft=cpp:*/
  #define RBIMPL_ATTR_FORCEINLINE_H
  /**
   * @file
   * @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 #RBIMPL_ATTR_FORCEINLINE.
   */
  #include "ruby/internal/compiler_since.h"
  #include "ruby/internal/has/attribute.h"
  
  /**
   * Wraps (or  simulates) `__forceinline`.  MSVC complains  on declarations like
   * `static inline __forceinline void foo()`.   It  seems  MSVC's  `inline`  and
   * `__forceinline` are mutually exclusive.  We have to mimic that behaviour for
   * non-MSVC compilers.
   */
  #if RBIMPL_COMPILER_SINCE(MSVC, 12, 0, 0)
  # define RBIMPL_ATTR_FORCEINLINE() __forceinline
  #elif RBIMPL_HAS_ATTRIBUTE(always_inline)
  # define RBIMPL_ATTR_FORCEINLINE() __attribute__((__always_inline__)) inline
  #else
  # define RBIMPL_ATTR_FORCEINLINE() inline
  #endif
  
  #endif /* RBIMPL_ATTR_FORCEINLINE_H */
  