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Diffstat (limited to 'include/ruby/backward/2/stdarg.h')
| -rw-r--r-- | include/ruby/backward/2/stdarg.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/include/ruby/backward/2/stdarg.h b/include/ruby/backward/2/stdarg.h new file mode 100644 index 0000000000..08659fee47 --- /dev/null +++ b/include/ruby/backward/2/stdarg.h @@ -0,0 +1,69 @@ +#ifndef RUBY_BACKWARD2_STDARG_H /*-*-C++-*-vi:se ft=cpp:*/ +#define RUBY_BACKWARD2_STDARG_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 old #_ + * + * Nobody should ever use these macros any longer. No known compilers lack + * prototypes today. It's 21st century. Just forget them. + */ + +#undef _ +/** + * @deprecated Nobody practically needs this macro any longer. + * @brief This was a transition path from K&R to ANSI. + */ +#ifdef HAVE_PROTOTYPES +# define _(args) args +#else +# define _(args) () +#endif + +#undef __ +/** + * @deprecated Nobody practically needs this macro any longer. + * @brief This was a transition path from K&R to ANSI. + */ +#ifdef HAVE_STDARG_PROTOTYPES +# define __(args) args +#else +# define __(args) () +#endif + +/** + * Functions declared using this macro take arbitrary arguments, including + * void. + * + * ```CXX + * void func(ANYARGS); + * ``` + * + * This was a necessary evil when there was no such thing like function + * overloading. But it is the 21st century today. People generally need not + * use this. Just use a granular typed function. + * + * @see ruby::backward::cxxanyargs + */ +#ifdef __cplusplus +#define ANYARGS ... +#else +#define ANYARGS +#endif + +#endif /* RUBY_BACKWARD2_STDARG_H */ |