lyng/notes/ai_state.md

AI State (for session restart)

Project: /home/sergeych/dev/lyng Module focus: :lynglib

Current focus

• Enforce compile-time name/member resolution only; no runtime scope lookup or fallback.
• Closures capture frame slots directly; materialize Scope only for Kotlin interop or explicit dynamic helpers.
• Object members are allowed on unknown types; other members require a statically known receiver type or explicit cast.
• Type system is Kotlin-style: T non-null, T? nullable, !! asserts non-null; void is a singleton of class Void.
• Type expressions: unions/intersections with bounds, declaration-site variance (in/out), and structural equality.

Key recent changes

• Updated AI helper docs to reflect static typing, type expressions, and compile-time-only name resolution.
• Added stdlib random API: Random and deterministic SeededRandom with nextInt, nextFloat, and generic next(range).
• Generalized primitive list optimization for compiler-generated List.fill:
  • List.fill(size) { intExpr } and List.fill(size, capacity) { intExpr } now both have bytecode fast paths.
  • Added LIST_NEW_INT_CAP / LIST_FILL_INT_CAP for the 3-arg capacity-preserving form.
• Fixed ObjList.add(...) to preserve primitive-int backing storage instead of forcing boxing through .list.
• OptTest.testAddToArray2 no longer shows the old 10x anomaly for List.fill(n, n + 10) or append-to-extended-list.

Known failing tests

• None in :lynglib:jvmTest after Random/SeededRandom integration.

Last test run

• ./gradlew :lynglib:jvmTest (PASS).