mv include/ruby/{impl,internal}

Devs do not love "impl".

1 files changed, 75 insertions, 0 deletions

diff --git a/include/ruby/internal/token_paste.h b/include/ruby/internal/token_paste.h
new file mode 100644
index 0000000000..473fd597f8
--- /dev/null
+++ b/include/ruby/internal/token_paste.h
@@ -0,0 +1,75 @@
+#ifndef RBIMPL_TOKEN_PASTE_H                         /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_TOKEN_PASTE_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_TOKEN_PASTE.
+ */
+#include "ruby/impl/config.h"
+#include "ruby/impl/compiler_since.h"
+#include "ruby/impl/has/warning.h"
+#include "ruby/impl/warning_push.h"
+
+/* :TODO: add your  compiler here.  There are many compilers  that can suppress
+ * warnings via pragmas, but not all of them accept such things inside of `#if`
+ * and  variants'  conditions.   And  such nitpicking  behavours  tend  not  be
+ * documented.  Please  improve this file when  you are really sure  about your
+ * compiler's behaviour. */
+
+#if RBIMPL_COMPILER_SINCE(GCC, 4, 2, 0)
+# /* GCC is one of such compiler who  cannot write `_Pragma` inside of a `#if`.
+#  * Cannot but globally kill everything.  This  is of course a very bad thing.
+#  * If you know how to reroute this please tell us. */
+# /* https://gcc.godbolt.org/z/K2xr7X */
+# define RBIMPL_TOKEN_PASTE(x, y) TOKEN_PASTE(x, y)
+# pragma GCC diagnostic ignored "-Wundef"
+# /* > warning: "symbol" is not defined, evaluates to 0 [-Wundef] */
+
+#elif RBIMPL_COMPILER_IS(Intel)
+# /* Ditto for icc. */
+# /* https://gcc.godbolt.org/z/pTwDxE */
+# define RBIMPL_TOKEN_PASTE(x, y) TOKEN_PASTE(x, y)
+# pragma warning(disable: 193)
+# /* > warning #193: zero used for undefined preprocessing identifier */
+
+#elif RBIMPL_COMPILER_BEFORE(MSVC, 19, 14, 26428)
+# /* :FIXME: is 19.14 the exact version they supported this? */
+# define RBIMPL_TOKEN_PASTE(x, y) TOKEN_PASTE(x, y)
+# pragma warning(disable: 4668)
+# /* > warning C4668: 'symbol' is not defined as a preprocessor macro */
+
+#elif RBIMPL_COMPILER_IS(MSVC)
+# define RBIMPL_TOKEN_PASTE(x, y) \
+    RBIMPL_WARNING_PUSH()         \
+    RBIMPL_WARNING_IGNORED(4668)  \
+    TOKEN_PASTE(x, y)            \
+    RBIMPL_WARNING_POP()
+
+#elif RBIMPL_HAS_WARNING("-Wundef")
+# define RBIMPL_TOKEN_PASTE(x, y)   \
+    RBIMPL_WARNING_PUSH()           \
+    RBIMPL_WARNING_IGNORED(-Wundef) \
+    TOKEN_PASTE(x, y)              \
+    RBIMPL_WARNING_POP()
+
+#else
+# /* No way. */
+# define RBIMPL_TOKEN_PASTE(x, y) TOKEN_PASTE(x, y)
+#endif
+
+#endif /* RBIMPL_TOKEN_PASTE_H */