From: matz@... (Yukihiro Matsumoto)
Date: 2001-12-28T11:48:15+09:00
Subject: [ruby-talk:29507] Re: C extensions to Ruby: classes vs. types

Hi,

In message "[ruby-talk:29494] C extensions to Ruby: classes vs. types"
    on 01/12/28, Tomasz Wegrzanowski <taw@users.sf.net> writes:

|I want to do something like that:
|
|static VALUE myclass_mymethod(VALUE self, VALUE arg)
|{
|	VALUE ac = arg->class;
|	VALUE result;
|
|	     if (ac.instanceof?(CLASS1)
|		{ result action1; }
|	else if (ac.kindof?(CLASS2))
|		{ result = action2; }
|	else
|		{ throw exception }
|	return result;
|}

static VALUE
myclass_mymethod(VALUE self, VALUE arg)
{
    VALUE result;

    if (rb_obj_kind_of(arg, CLASS1)) {
	result = action1;
    }
    if (rb_obj_kind_of(arg, CLASS2)) {
	result = action2;
    }
    else {
	rb_raise(rb_eSomeError, "throw exception");
    }
    return result;
}