__method__

/*
 *  call-seq:
 *     __method__         => symbol
 *  
 *  Returns the name of the current method as a Symbol.
 *  If called from inside of an aliased method it will return the original
 *  nonaliased name.
 *  If called outside of a method, it returns <code>nil</code>.
 *  
 *    def foo
 *      __method__
 *    end
 *    alias bar foo
 *    
 *    foo                # => :foo
 *    bar                # => :foo
 *
 */

static VALUE
rb_f_method_name()
{
    struct FRAME* prev = ruby_frame->prev;
    if (prev && prev->orig_func) {
        return ID2SYM(prev->orig_func);
    }
    else {
        return Qnil;
    }
}