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Showing content from https://docs.ruby-lang.org/en/3.4/ObjectSpace/InternalObjectWrapper.html below:

class ObjectSpace::InternalObjectWrapper - Documentation for Ruby 3.4

1. ObjectSpace::
2. InternalObjectWrapper

This class is used as a return value from ObjectSpace::reachable_objects_from.

When ObjectSpace::reachable_objects_from returns an object with references to an internal object, an instance of this class is returned.

You can use the type method to check the type of the internal object.

static VALUE
iow_inspect(VALUE self)
{
    VALUE obj = (VALUE)DATA_PTR(self);
    VALUE type = type2sym(BUILTIN_TYPE(obj));

    return rb_sprintf("#<InternalObject:%p %"PRIsVALUE">", (void *)obj, rb_sym2str(type));
}

See Object#inspect.

static VALUE
iow_internal_object_id(VALUE self)
{
    VALUE obj = (VALUE)DATA_PTR(self);
    return rb_obj_id(obj);
}

Returns the Object#object_id of the internal object.

static VALUE
iow_type(VALUE self)
{
    VALUE obj = (VALUE)DATA_PTR(self);
    return type2sym(BUILTIN_TYPE(obj));
}

Returns the type of the internal object.

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