Question

I know that attr_accessor is defined inside the Module class, but I am trying to find the source file for the Module class and cant find it. I recursively searched in my ruby dir for ‘def attr_accessor’ and got nothing?

Any idea where it could be?

Answer 1

Module#attr_accessor is implemented in C. You can see the method definition if you use Pry:

[2] pry(main)> show-method Module#attr_accessor

From: object.c in Ruby Core (C Method):
Number of lines: 10
Owner: Module
Visibility: private

static VALUE
rb_mod_attr_accessor(int argc, VALUE *argv, VALUE klass)
{
    int i;

    for (i=0; i<argc; i++) {
    rb_attr(klass, rb_to_id(argv[i]), TRUE, TRUE, TRUE);
    }
    return Qnil;
}
[3] pry(main)>