|Version 1 (modified by bacek, 5 years ago)|
Idea of refactoring Key PMC
Current Keys are messy and incomprehensible. So there is idea of refactoring them into something more sane.
Keys currently serve only one purpose: navigate in nested containers. Iteration over containers was removed as part of key_revamp branch. To support this functionality more implicit and in clean way we will:
1. Add KeyItem interface class to represent single abstract step.
2. Implement StringKeyItem, IntegerKeyItem and PMCKeyItem to store concrete value for each step. Such FooKeyItem will implement get_foo vtable methods, freeze/thaw and nothing else. We don't need FloatKeyItem because float keys are meaningless.
3. Re-implement Key as:
- RPA for storing *KeyItem.
- Various push_foo vtables to create specific FooKeyItem and append it to path.