lyng/notes/ai_state.md

AI State (for session restart)

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

Current focus

• Enforce compile-time name/member resolution only; no runtime scope lookup or fallback.
• Bytecode uses memberId-based ops (CALL_MEMBER_SLOT/GET_MEMBER_SLOT/SET_MEMBER_SLOT).
• Runtime lookup opcodes (CALL_VIRTUAL/GET_FIELD/SET_FIELD) and fallback callsites are removed.

Key recent changes

• Removed method callsite PICs and fallback opcodes; bytecode now relies on compile-time member ids only.
• Operator dispatch emits memberId calls when known; falls back to Obj opcodes for allowed built-ins without name lookup.
• Object members are allowed on unknown types; other members still require a statically known receiver type.
• Renamed BytecodeFallbackException to BytecodeCompileException.

Known failing tests

• None (jvmTest passing).

Files touched recently

• notes/type_system_spec.md (spec updated)
• AGENTS.md (type inference reminders)
• lynglib/src/commonMain/kotlin/net/sergeych/lyng/VarDeclStatement.kt
• lynglib/src/commonMain/kotlin/net/sergeych/lyng/Compiler.kt
• lynglib/src/commonMain/kotlin/net/sergeych/lyng/bytecode/BytecodeCompiler.kt
• lynglib/src/commonMain/kotlin/net/sergeych/lyng/obj/ObjIterable.kt
• various bytecode runtime/disassembler files (memberId ops)

Last test run

• ./gradlew :lynglib:jvmTest --tests ScriptTest.testForInIterableUnknownTypeDisasm

Spec decisions (notes/type_system_spec.md)

• Nullability: Kotlin-style, T non-null, T? nullable, !! asserts non-null.
• void is singleton of class Void (syntax sugar).
• Untyped params default to Object (non-null); syntax sugar: fun foo(x?) and class X(a,b?).
• Object member access requires explicit cast; remove inspect, use toInspectString().