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Diffstat (limited to 'include/ruby/backward/2/extern.h')
| -rw-r--r-- | include/ruby/backward/2/extern.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/include/ruby/backward/2/extern.h b/include/ruby/backward/2/extern.h new file mode 100644 index 0000000000..e7018342ea --- /dev/null +++ b/include/ruby/backward/2/extern.h @@ -0,0 +1,45 @@ +/** \noop-*-C++-*-vi:ft=cpp + * @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 `RUBY3` or `ruby3` 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 #EXTERN + */ +#include "ruby/3/config.h" /* for STRINGIZE */ + +/** + * @brief Synonym of #RUBY_EXTERN. + * @deprecated #EXTERN is deprecated, use #RUBY_EXTERN instead. + */ +#ifdef EXTERN +# /* Stop bothering then. */ + +#elif defined __GNUC__ +# define EXTERN \ + _Pragma("message \"EXTERN is deprecated, use RUBY_EXTERN instead\""); \ + RUBY_EXTERN + +#elif defined _MSC_VER +# pragma deprecated(EXTERN) +# define EXTERN \ + __pragma(message(__FILE__"("STRINGIZE(__LINE__)"): warning: " \ + "EXTERN is deprecated, use RUBY_EXTERN instead")) \ + RUBY_EXTERN + +#else +# define EXTERN <-<-"EXTERN is deprecated, use RUBY_EXTERN instead"->-> + +#endif |