For the method invocation expression o.m, Ruby performs name resolution with the following steps: 1) first, it checks the eigenclass of o for singleton methods named m. 2) If no method m is found in the eigenclass, Ruby searches the class of the o for an instance method named m. 3) If no method m is found in the class, Ruby searches the instance methods of any modules included by the class of o. If that class includes more than one module, then they are searched in the reveerse of the order in which they wre included. That is, the most recently included module is searched first. If no instance method m is found in the class of o or in its modules, then the search moves up the inheirtance hierarchy to the superclass. Steps 2 and 3 are repeated for each class in the inheritance heirarchy until each ancestor class and its included modules have been searched. If no method named m is found after completing the search, then a method named method_missing is invoked instead. In order to find an appropriate definition of this method, the name resolution algorithm starts over at step 1. The kernel module provides a default implementation of method_missing, so this second pass of name resolution is guaranteed to succeed.
Notice the part "Steps 2 and 3 are repeated for each class in the inheritance heirarchy..." What if the superclass has an eigenclass method? Why doesn't it repeat Step 1? -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
