Ruby  3.4.0dev (2024-11-22 revision 0989400a925cd201defdca9eb28eb87200b30785)
Macros | Functions
object.h File Reference

(0989400a925cd201defdca9eb28eb87200b30785)

Public APIs related to rb_cObject. More...

#include "ruby/internal/attr/const.h"
#include "ruby/internal/attr/deprecated.h"
#include "ruby/internal/attr/nonnull.h"
#include "ruby/internal/attr/pure.h"
#include "ruby/internal/dllexport.h"
#include "ruby/internal/value.h"
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Macros

#define RB_OBJ_INIT_COPY(obj, orig)    ((obj) != (orig) && (rb_obj_init_copy((obj), (orig)), 1))
 This macro is (used but) mysterious. More...
 
#define OBJ_INIT_COPY(obj, orig)   RB_OBJ_INIT_COPY(obj, orig)
 Old name of RB_OBJ_INIT_COPY. More...
 

Functions

VALUE rb_class_new_instance_pass_kw (int argc, const VALUE *argv, VALUE klass)
 Identical to rb_class_new_instance(), except it passes the passed keywords if any to the #initialize method. More...
 
VALUE rb_class_new_instance (int argc, const VALUE *argv, VALUE klass)
 Allocates, then initialises an instance of the given class. More...
 
VALUE rb_class_new_instance_kw (int argc, const VALUE *argv, VALUE klass, int kw_splat)
 Identical to rb_class_new_instance(), except you can specify how to handle the last element of the given array. More...
 
int rb_eql (VALUE lhs, VALUE rhs)
 Checks for equality of the passed objects, in terms of Object#eql?. More...
 
VALUE rb_any_to_s (VALUE obj)
 Generates a textual representation of the given object. More...
 
VALUE rb_inspect (VALUE obj)
 Generates a human-readable textual representation of the given object. More...
 
VALUE rb_obj_is_instance_of (VALUE obj, VALUE klass)
 Queries if the given object is a direct instance of the given class. More...
 
VALUE rb_obj_is_kind_of (VALUE obj, VALUE klass)
 Queries if the given object is an instance (of possibly descendants) of the given class. More...
 
VALUE rb_obj_alloc (VALUE klass)
 Allocates an instance of the given class. More...
 
VALUE rb_obj_clone (VALUE obj)
 Produces a shallow copy of the given object. More...
 
VALUE rb_obj_dup (VALUE obj)
 Duplicates the given object. More...
 
VALUE rb_obj_init_copy (VALUE src, VALUE dst)
 Default implementation of #initialize_copy, #initialize_dup and #initialize_clone. More...
 
VALUE rb_obj_freeze (VALUE obj)
 Just calls rb_obj_freeze_inline() inside. More...
 
VALUE rb_obj_frozen_p (VALUE obj)
 Just calls RB_OBJ_FROZEN() inside. More...
 
VALUE rb_obj_id (VALUE obj)
 Finds or creates an integer primary key of the given object. More...
 
VALUE rb_memory_id (VALUE obj)
 Identical to rb_obj_id(), except it hesitates from allocating a new instance of rb_cInteger. More...
 
VALUE rb_class_real (VALUE klass)
 Finds a "real" class. More...
 
VALUE rb_class_inherited_p (VALUE scion, VALUE ascendant)
 Determines if the given two modules are relatives. More...
 
VALUE rb_class_superclass (VALUE klass)
 Queries the parent of the given class. More...
 
VALUE rb_convert_type (VALUE val, int type, const char *name, const char *mid)
 Converts an object into another type. More...
 
VALUE rb_check_convert_type (VALUE val, int type, const char *name, const char *mid)
 Identical to rb_convert_type(), except it returns RUBY_Qnil instead of raising exceptions, in case of conversion failure. More...
 
VALUE rb_check_to_integer (VALUE val, const char *mid)
 Identical to rb_check_convert_type(), except the return value type is fixed to rb_cInteger. More...
 
VALUE rb_check_to_float (VALUE val)
 This is complicated. More...
 
VALUE rb_to_int (VALUE val)
 Identical to rb_check_to_int(), except it raises in case of conversion mismatch. More...
 
VALUE rb_check_to_int (VALUE val)
 Identical to rb_check_to_integer(), except it uses #to_int for conversion. More...
 
VALUE rb_Integer (VALUE val)
 This is the logic behind Kernel#Integer. More...
 
VALUE rb_to_float (VALUE val)
 Identical to rb_check_to_float(), except it raises on error. More...
 
VALUE rb_Float (VALUE val)
 This is the logic behind Kernel#Float. More...
 
VALUE rb_String (VALUE val)
 This is the logic behind Kernel#String. More...
 
VALUE rb_Array (VALUE val)
 This is the logic behind Kernel#Array. More...
 
VALUE rb_Hash (VALUE val)
 This is the logic behind Kernel#Hash. More...
 
double rb_cstr_to_dbl (const char *str, int mode)
 Converts a textual representation of a real number into a numeric, which is the nearest value that the return type can represent, of the value that the argument represents. More...
 
double rb_str_to_dbl (VALUE str, int mode)
 Identical to rb_cstr_to_dbl(), except it accepts a Ruby's string instead of C's. More...
 

Detailed Description

Public APIs related to rb_cObject.

Author
Ruby developers ruby-.nosp@m.core.nosp@m.@ruby.nosp@m.-lan.nosp@m.g.org
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.

Definition in file object.h.

Macro Definition Documentation

◆ RB_OBJ_INIT_COPY

#define RB_OBJ_INIT_COPY (   obj,
  orig 
)     ((obj) != (orig) && (rb_obj_init_copy((obj), (orig)), 1))

This macro is (used but) mysterious.

Why on earth do we need this?

Definition at line 38 of file object.h.

Function Documentation

◆ rb_memory_id()

VALUE rb_memory_id ( VALUE  obj)

Identical to rb_obj_id(), except it hesitates from allocating a new instance of rb_cInteger.

rb_obj_id() could allocate RUBY_T_BIGNUM objects. That allocation might perhaps impact negatively. On such situations, this function instead returns one-shot temporary small integers that need no allocations at all. The values are guaranteed unique at the moment, but no future promise is made; could be reused. Use of this API should be very instant. It is a failure to store the returned integer to somewhere else.

In short it is difficult to use.

Parameters
[in]objArbitrary ruby object.
Returns
An instance of rb_cInteger unique at the moment.

Definition at line 1706 of file gc.c.

◆ rb_obj_id()

VALUE rb_obj_id ( VALUE  obj)

Finds or creates an integer primary key of the given object.

In the old days this function was a purely arithmetic operation that maps the underlying memory address where the object resides into a Ruby's integer. Some time around 2.x this changed. It no longer relates its return values to C level pointers. This function assigns some random number to the given object if absent. The same number will be returned on all subsequent requests. No two active objects share a number.

Parameters
[in]objArbitrary ruby object.
Returns
An instance of rb_cInteger which is an "identifier" of obj.

Definition at line 1739 of file gc.c.