Creating an object of a specific type

ruby-talk
1

Hello!

Consider I have:

static VALUE foo_init (self)
{
return self;
}

cFoo = rb_define_class (“Foo”, cFoo);
rb_define_method (cFoo, “initialize”, foo_init, 0);

Now I want, from a method of another class, to create a new Foo
object, which contains nothing.

I don’t want to use Data_Make_Struct() since the object is
not connected with a C structure.

How can I do this simple thing? Perhaps using the NEWOBJ()
macro? But, again how can a specify that the new object’s type
is Foo?

Regards,

···

–
University of Athens I bet the human brain
Physics Department is a kludge --Marvin Minsky

2

Elias Athanasopoulos wrote:

Now I want, from a method of another class, to create a new Foo
object, which contains nothing.

What about:

 VALUE fooInstance;
 fooInstance = rb_funcall(cFoo, "new", 0, NULL);

Hope this helps,

Lyle

3

It does. Thank you.

I wonder if it is complex enough to do the above purely in
C via the Ruby API (it would be faster, I guess).

Regards,

···

On Tue, Dec 23, 2003 at 06:01:53AM +0900, Lyle Johnson wrote:

Now I want, from a method of another class, to create a new Foo
object, which contains nothing.

What about:

VALUE fooInstance;
fooInstance = rb_funcall(cFoo, "new", 0, NULL);

Hope this helps,

–
University of Athens I bet the human brain
Physics Department is a kludge --Marvin Minsky

4

Or:

#include <intern.h>
VALUE fooInstance = rb_class_new_instance( 0, NULL, cFoo );

···

On Dec 22, 2003, at 2:01 PM, Lyle Johnson wrote:

Elias Athanasopoulos wrote:

Now I want, from a method of another class, to create a new Foo
object, which contains nothing.

What about:

VALUE fooInstance;
fooInstance = rb_funcall(cFoo, "new", 0, NULL);

–
Michael Granger ged@FaerieMUD.org
Rubymage, Believer, Architect
The FaerieMUD Consortium http://www.FaerieMUD.org/