Updated documentation to clarify property syntax, closure resolution rules, and override usage

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sergeych committed 2026-01-10 18:08:07 +01:00
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@@ -8,16 +8,13 @@ Name lookup across nested scopes and closures can accidentally form recursive re
## Resolution order in ClosureScope
When evaluating an identifier `name` inside a closure, `ClosureScope.get(name)` resolves in this order:
1. Closure frame locals and arguments
2. Captured receiver (`closureScope.thisObj`) instance/class members
3. Closure ancestry locals + each frame’s `thisObj` members (cycle‑safe)
4. Caller `this` members
5. Caller ancestry locals + each frame’s `thisObj` members (cycle‑safe)
6. Module pseudo‑symbols (e.g., `__PACKAGE__`) from the nearest `ModuleScope`
7. Direct module/global fallback (nearest `ModuleScope` and its parent/root scope)
8. Final fallback: base local/parent lookup for the current frame
1. **Current frame locals and arguments**: Variables defined within the current closure execution.
2. **Captured lexical ancestry**: Outer local variables captured at the site where the closure was defined (the "lexical environment").
3. **Captured receiver members**: If the closure was defined within a class or explicitly bound to an object, it checks members of that object (`this`). This includes both instance fields/methods and class-level static members, following the MRO (C3) and respecting visibility rules (private members are only visible if the closure was defined in their class).
4. **Caller environment**: If not found lexically, it falls back to the calling context (e.g., the DSL's `this` or the caller's local variables).
5. **Global/Module fallbacks**: Final check for module-level constants and global functions.
This preserves intuitive visibility (locals → captured receiver → closure chain → caller members → caller chain → module/root) while preventing infinite recursion between scope types.
This ensures that closures primarily interact with their defining environment (lexical capture) while still being able to participate in DSL-style calling contexts.
## Use raw‑chain helpers for ancestry walks
When authoring new scope types or advanced lookups, avoid calling virtual `get` while walking parents. Instead, use the non‑dispatch helpers on `Scope`: