From: "Bennett, Patrick" <Patrick.Bennett@...>
Date: 2003-11-14T04:27:58+09:00
Subject: Re: Problem with exception class and instance vars

Ah-ha! (or, Doh!)  I had defined my 'get' methods with the wrong
signature.
I had set them up as if they were rb_define_method(..., -1) methods
taking (argc, argv, self) instead of (self)
Your test example made me realize the error of my ways. ;)
Thanks!!

Patrick Bennett

-----Original Message-----
From: ts [mailto:decoux@moulon.inra.fr] 
Sent: Thursday, November 13, 2003 11:41 AM
To: ruby-talk ML
Cc: ruby-talk@ruby-lang.org
Subject: Re: Problem with exception class and instance vars


>>>>> "B" == Bennett, Patrick <Patrick.Bennett@inin.com> writes:

B> What am I doing wrong?

 Difficult to say : probably ruby don't like C++ :-))

svg% cat aa.c
#include <ruby.h>

static VALUE evx;

static VALUE
aa_tt(obj)
    VALUE obj;
{
    VALUE thr = rb_exc_new2(evx, "<exception>");
    rb_iv_set(thr, "@event", rb_str_new2("<string>"));
    rb_iv_set(thr, "@msg", rb_str_new2("<another string>"));
    rb_exc_raise(thr);
}

static VALUE
aa_event(obj)
    VALUE obj;
{
    return rb_iv_get(obj, "@event");
}

static VALUE
aa_msg(obj)
    VALUE obj;
{
    return rb_iv_get(obj, "@msg");
}

void Init_aa()
{
    evx = rb_define_class("EventException", rb_eStandardError);
    rb_define_method(evx, "event", aa_event, 0);
    rb_define_method(evx, "msg", aa_msg, 0);
    rb_define_global_function("tt", aa_tt, 0);
}
svg% 

svg% cat b.rb
#!/usr/bin/ruby
require 'aa'
begin
   tt
rescue EventException => ex
    puts "Event : #{ex.event} Msg : #{ex.msg} Exception : #{ex}" end
svg% 

svg% b.rb
Event : <string> Msg : <another string> Exception : <exception> svg% 



Guy Decoux