mv include/ruby/{3,impl}

Devs do not love "3".

1 files changed, 41 insertions, 0 deletions

diff --git a/include/ruby/impl/compiler_is/apple.h b/include/ruby/impl/compiler_is/apple.h
new file mode 100644
index 0000000000..b4ff8fd211
--- /dev/null
+++ b/include/ruby/impl/compiler_is/apple.h
@@ -0,0 +1,41 @@
+#ifndef RUBY3_COMPILER_IS_APPLE_H                    /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY3_COMPILER_IS_APPLE_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_COMPILER_IS_Apple.
+ *
+ * Apple  ships clang.   Problem is,  its  `__clang_major__` etc.  are not  the
+ * upstream LLVM  version, but XCode's.  We  have to think Apple's  is distinct
+ * from LLVM's,  when it comes  to compiler  detection business in  this header
+ * file.
+ */
+#if ! defined(__clang__)
+# define RUBY3_COMPILER_IS_Apple 0
+
+#elif ! defined(__apple_build_version__)
+# define RUBY3_COMPILER_IS_Apple 0
+
+#else
+# define RUBY3_COMPILER_IS_Apple 1
+# define RUBY3_COMPILER_VERSION_MAJOR __clang_major__
+# define RUBY3_COMPILER_VERSION_MINOR __clang_minor__
+# define RUBY3_COMPILER_VERSION_PATCH __clang_patchlevel__
+#endif
+
+#endif /* RUBY3_COMPILER_IS_APPLE_H */