From: "Iñaki Baz Castillo" <ibc@...>
Date: 2009-10-22T21:30:10+09:00
Subject: Creating and raising custom exception in Ruby C extension

Hi, I'm trying to create a CustomError exception in a Ruby C extension and raise it:

  VALUE class_standard_error = rb_const_get(rb_cObject, rb_intern("StandardError"));
  VALUE class_custom_error = rb_define_class_under(class_standard_error, "ClassError", rb_cObject);
  rb_raise(class_custom_error, "Oh, a custom error occurred !!!");

Unfortunatelly when running it I get:

  ArgumentError: wrong number of arguments(1 for 0)
    ./test_unit.rb:22:in `initialize'
    ./test_unit.rb:22:in `new'
    ./test_unit.rb:22:in `my_function'
    ./test_unit.rb:22:in `test_01

Being "my_function" the Ruby method calling to the above C code.

I suspect that the line:
  rb_raise(class_custom_error, "Oh, a custom error occurred !!!");
is not correct. How should look the first argument?

Thanks a lot.

-- 
Iñaki Baz Castillo <ibc@aliax.net>