@@ -32,47 +32,49 @@ metaclass for an object can be obtained by calling the +metaclass+ method. == method lookup or method resolution -+-------------+ -| nil | -+-------------+ - ^ - | superclass - | -+-------------+ -| Object | -+-------------+ - ^ - | superclass - | -+-------------+ -| Module | -+-------------+ - ^ - | superclass - | -+-------------+ -| Class | -+-------------+ - ^ - | superclass - | -+-------------+ -| MetaClass | -| (Object) | -+-------------+ - ^ - | superclass - | -+-------------+ -| MetaClass | -| (F) | -+-------------+ - ^ - | metaclass - | -+-------------+ -| F | -+-------------+ +The rule is simple: Take the object located in the class slot of the object +(which is not always the return value of Object#class) and begin searching. + +Searching goes up the superclass chain until the superclass is nil. + +In which case, redo lookup for method_missing. If we fail to find +method_missing, fail tragicly. + + +-------------+ + | nil | + +-------------+ + ^ + | superclass + | + +-------------+ + | Object | + +-------------+ + ^ + | superclass + | + +-------------+ + | Module | + +-------------+ + ^ + | superclass + | + +-------------+ + | Class | + +-------------+ + ^ + | superclass + | + +-------------+ + | MetaClass | + | (Object) | + +-------------+ + ^ + | superclass + | + +-------------+ +-------------+ + | F | -----------------> | MetaClass | + +-------------+ metaclass | (F) | + +-------------+ class Class doc/glossary.txt 118eaa9a42b7cfcc7087e82b52c69d1abeb372a5 Evan Phoenix ephoenix@engineyard.com http://github.com/evanphx/rubinius/commit/393d23cad31e0e9501c619de262fb9610b4d5d7f 393d23cad31e0e9501c619de262fb9610b4d5d7f 2008-08-28T16:59:30-07:00 2008-08-28T16:09:33-07:00 Add a bit more about method resolution c3c037c9b4393197a12c91e60a65e95b41a3a7ff Evan Phoenix ephoenix@engineyard.com