Class: Object

Inherits:
BasicObject
Defined in:
lib/utilrb/object/address.rb,
lib/utilrb/enumerable/uniq.rb,
lib/utilrb/object/attribute.rb,
lib/utilrb/object/scoped_eval.rb,
lib/utilrb/object/singleton_class.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.address_from_id(id) ⇒ Object

Converts the object_id of a non-immediate object to its memory address



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# File 'lib/utilrb/object/address.rb', line 9

def self.address_from_id(id)
  id = 0xFFFFFFFFFFFFFFFF - ~id if id < 0
  (id * 2) & 0xFFFFFFFFFFFFFFFF
end

.immediate?(object) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/utilrb_ext.cc', line 108

static VALUE kernel_is_immediate(VALUE klass, VALUE object)
{ return IMMEDIATE_P(object) ? Qtrue : Qfalse; }

.swap!(obj1, obj2) ⇒ Object

Kernel.swap!(obj1, obj2, *args)

Swaps the object which are being hold by obj1 and obj2.

WARNING: I don’t know if this can be called in a method of obj1 or obj2



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# File 'ext/swap.cc', line 14

static VALUE kernel_swap_bang(VALUE self, VALUE obj1, VALUE obj2)
{
    // Save the definition of the old object
    RVALUE old_obj;
    memcpy(&old_obj, reinterpret_cast<void*>(obj1), SLOT_SIZE);
    // Place the definition of the new object in the slot of the old one
    memcpy(reinterpret_cast<void*>(obj1), reinterpret_cast<void*>(obj2), SLOT_SIZE);
    // Place the definition of the old object in the slot of the new one
    memcpy(reinterpret_cast<void*>(obj2), &old_obj, SLOT_SIZE);

    return Qnil;
}

Instance Method Details

#address ⇒ Object

Return the object address (for non immediate objects).



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# File 'lib/utilrb/object/address.rb', line 5

def address; Object.address_from_id(object_id) end

#class_attribute(attr_def, &init) ⇒ Object

Like #attribute, but on the singleton class of this object



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# File 'lib/utilrb/object/attribute.rb', line 71

def class_attribute(attr_def, &init)
  singleton_class.class_eval { attribute(attr_def, &init) }
end

#enum_uniq(enum_with = :each, *args, &filter) ⇒ Object

Enumerate using the each(*args) method, removing the duplicate entries. If filter is given, it should return an object the enumerator will compare for equality (instead of using the objects themselves)



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# File 'lib/utilrb/enumerable/uniq.rb', line 52

def enum_uniq(enum_with = :each, *args, &filter)
  UniqEnumerator.new(self, enum_with, args, filter)
end

#is_singleton?(object) ⇒ Boolean

Returns true if self is a singleton class

Returns:

  • (Boolean) 


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# File 'ext/utilrb_ext.cc', line 44

static VALUE kernel_is_singleton_p(VALUE self)
{
    if (BUILTIN_TYPE(self) == T_CLASS && FL_TEST(self, FL_SINGLETON))
  return Qtrue;
    else
  return Qfalse;
}

#scoped_eval(type = :instance_eval, &b) ⇒ Object 



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# File 'lib/utilrb/object/scoped_eval.rb', line 5

def scoped_eval(type = :instance_eval, &b)
    modules = b.binding.eval "Module.nesting"
    with_module(*modules) do
        send(type, &b)
    end
end

#singleton_class ⇒ Object

Returns the singleton class for this object.

In Ruby 1.8, makes sure that the #superclass method of the singleton class returns the object’s class (instead of Class), as Ruby 1.9 does

The first element of #ancestors on the returned singleton class is the singleton class itself. A #singleton_instance accessor is also defined, which returns the object instance the class is the singleton of.



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# File 'lib/utilrb/object/singleton_class.rb', line 15

def singleton_class
    class << self; self end
end