diff options
author | 卜部昌平 <shyouhei@ruby-lang.org> | 2020-05-04 15:26:12 +0900 |
---|---|---|
committer | 卜部昌平 <shyouhei@ruby-lang.org> | 2020-05-11 09:24:08 +0900 |
commit | dca234a5dc9d5bb39c906d833c43305ce95508fb (patch) | |
tree | aeecc73da2a3f9e6d2417fc9fd57e80ff0d2540a /include/ruby/impl/attr/noreturn.h | |
parent | c89c3801b985916b6fb6726aab966d28371dfaaa (diff) |
mv include/ruby/{3,impl}
Devs do not love "3".
Notes
Notes:
Merged: https://github.com/ruby/ruby/pull/3079
Diffstat (limited to 'include/ruby/impl/attr/noreturn.h')
-rw-r--r-- | include/ruby/impl/attr/noreturn.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/include/ruby/impl/attr/noreturn.h b/include/ruby/impl/attr/noreturn.h new file mode 100644 index 0000000000..999a76b8e5 --- /dev/null +++ b/include/ruby/impl/attr/noreturn.h @@ -0,0 +1,52 @@ +#ifndef RUBY3_ATTR_NORETURN_H /*-*-C++-*-vi:se ft=cpp:*/ +#define RUBY3_ATTR_NORETURN_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 `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 #RUBY3_ATTR_NORETURN. + */ +#include "ruby/3/compiler_since.h" +#include "ruby/3/has/attribute.h" +#include "ruby/3/has/cpp_attribute.h" +#include "ruby/3/has/declspec_attribute.h" + +/** Wraps (or simulates) `[[noreturn]]` */ +#if RUBY3_COMPILER_SINCE(SunPro, 5, 10, 0) +# define RUBY3_ATTR_NORETURN() _Pragma("does_not_return") + +#elif RUBY3_HAS_DECLSPEC_ATTRIBUTE(noreturn) +# define RUBY3_ATTR_NORETURN() __declspec(noreturn) + +#elif RUBY3_HAS_ATTRIBUTE(noreturn) +# define RUBY3_ATTR_NORETURN() __attribute__((__noreturn__)) + +#elif RUBY3_HAS_CPP_ATTRIBUTE(noreturn) +# define RUBY3_ATTR_NORETURN() [[noreturn]] + +#elif defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112) +# define RUBY3_ATTR_NORETURN() _Noreturn + +#elif defined(_Noreturn) +# /* glibc <sys/cdefs.h> has this macro. */ +# define RUBY3_ATTR_NORETURN() _Noreturn + +#else +# define RUBY3_ATTR_NORETURN() /* void */ +#endif + +#endif /* RUBY3_ATTR_NORETURN_H */ |