Allow ruby versions 3.2 and 3.4 for installation

libs/libruby/ruby/internal/core/rbasic.h

@@ -0,0 +1,158 @@
+#ifndef RBIMPL_RBASIC_H                              /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_RBASIC_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 struct ::RBasic.
+ */
+#include "ruby/internal/attr/artificial.h"
+#include "ruby/internal/attr/constexpr.h"
+#include "ruby/internal/attr/forceinline.h"
+#include "ruby/internal/attr/noalias.h"
+#include "ruby/internal/attr/pure.h"
+#include "ruby/internal/cast.h"
+#include "ruby/internal/dllexport.h"
+#include "ruby/internal/special_consts.h"
+#include "ruby/internal/value.h"
+#include "ruby/assert.h"
+
+/**
+ * Convenient casting macro.
+ *
+ * @param   obj  Arbitrary Ruby object.
+ * @return  The passed object casted to ::RBasic.
+ */
+#define RBASIC(obj)                 RBIMPL_CAST((struct RBasic *)(obj))
+/** @cond INTERNAL_MACRO */
+#define RBASIC_CLASS                RBASIC_CLASS
+#define RBIMPL_RVALUE_EMBED_LEN_MAX 3
+#define RVALUE_EMBED_LEN_MAX        RVALUE_EMBED_LEN_MAX
+#define RBIMPL_EMBED_LEN_MAX_OF(T) \
+    RBIMPL_CAST((int)(sizeof(VALUE[RBIMPL_RVALUE_EMBED_LEN_MAX]) / (sizeof(T))))
+/** @endcond */
+
+/**
+ * This is an enum because GDB wants it (rather than a macro).  People need not
+ * bother.
+ */
+enum ruby_rvalue_flags {
+    /** Max possible number of objects that can be embedded. */
+    RVALUE_EMBED_LEN_MAX = RBIMPL_RVALUE_EMBED_LEN_MAX
+};
+
+/**
+ * Ruby's object's,  base components.  Every  single ruby objects have  them in
+ * common.
+ */
+struct
+RUBY_ALIGNAS(SIZEOF_VALUE)
+RBasic {
+
+    /**
+     * Per-object  flags.  Each  ruby  objects have  their own  characteristics
+     * apart from their  classes.  For instance whether an object  is frozen or
+     * not is not  controlled by its class.  This is  where such properties are
+     * stored.
+     *
+     * @see enum ::ruby_fl_type
+     *
+     * @note  This is ::VALUE rather than  an enum for alignment purpose.  Back
+     *        in the 1990s there were no such thing like `_Alignas` in C.
+     */
+    VALUE flags;
+
+    /**
+     * Class of an object.  Every object has its class.  Also, everything is an
+     * object  in Ruby.   This means  classes are  also objects.   Classes have
+     * their own classes,  classes of classes have their classes,  too ...  and
+     * it recursively continues forever.
+     *
+     * Also note the `const` qualifier.  In  ruby an object cannot "change" its
+     * class.
+     */
+    const VALUE klass;
+
+#ifdef __cplusplus
+  public:
+    RBIMPL_ATTR_CONSTEXPR(CXX11)
+    RBIMPL_ATTR_ARTIFICIAL()
+    RBIMPL_ATTR_FORCEINLINE()
+    RBIMPL_ATTR_NOALIAS()
+    /**
+     * We need to define this explicit constructor because the field `klass` is
+     * const-qualified above,  which effectively  defines the  implicit default
+     * constructor as "deleted"  (as of C++11) --  No way but to  define one by
+     * ourselves.
+     */
+    RBasic() :
+        flags(RBIMPL_VALUE_NULL),
+        klass(RBIMPL_VALUE_NULL)
+    {
+    }
+#endif
+};
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+/**
+ * Make the object invisible from Ruby code.
+ *
+ * It is  useful to let  Ruby's GC manage your  internal data structure  -- The
+ * object keeps being managed by GC, but `ObjectSpace.each_object` never yields
+ * the object.
+ *
+ * Note that the object also lose a way to call a method on it.
+ *
+ * @param[out]  obj  A Ruby object.
+ * @return      The passed object.
+ * @post        The object is destructively modified to be invisible.
+ * @see         rb_obj_reveal
+ */
+VALUE rb_obj_hide(VALUE obj);
+
+/**
+ * Make a hidden object visible again.
+ *
+ * It is  the caller's  responsibility to  pass the  right `klass`  which `obj`
+ * originally used to belong to.
+ *
+ * @param[out]  obj    A Ruby object.
+ * @param[in]   klass  Class of `obj`.
+ * @return      Passed `obj`.
+ * @pre         `obj` was previously hidden.
+ * @post        `obj`'s class is `klass`.
+ * @see         rb_obj_hide
+ */
+VALUE rb_obj_reveal(VALUE obj, VALUE klass); /* do not use this API to change klass information */
+RBIMPL_SYMBOL_EXPORT_END()
+
+RBIMPL_ATTR_PURE_UNLESS_DEBUG()
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Queries the class of an object.
+ *
+ * @param[in]  obj  An object.
+ * @return     Its class.
+ */
+static inline VALUE
+RBASIC_CLASS(VALUE obj)
+{
+    RBIMPL_ASSERT_OR_ASSUME(! RB_SPECIAL_CONST_P(obj));
+    return RBASIC(obj)->klass;
+}
+
+#endif /* RBIMPL_RBASIC_H */