a1bfd55b38
- types.janet: make-hierarchy, derive*, ancestors, descendants, isa?, underive - evaluator.janet: defmulti extended with :default and :hierarchy options + keyword dispatch-fns wrapped as (fn [x] (get x kw)) for Janet compat + hierarchy-based dispatch walks isa? chain when no direct match - core.janet: real derive, isa?, ancestors, descendants implementations replacing stubs; core-remove-method, core-remove-all-methods, core-prefer-method added; new core-bindings entries - 5 test sections (22-26): hierarchy ops, basic dispatch, :default, hierarchy dispatch, remove-method — all pass - 317 tests, 0 failures
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Test files: test/phase6-final.janet (47 tests, 58 assertions — collections, math, predicates, comparison, seq ops, special forms, macros, complex nesting). Phase 1 tests appended to test/compiler-test.janet (ns accessors, ns form extensions). All 317 tests pass. § Phase 3 (Var system): find-var (ctx-based, resolve-q/nq symbol), alter-meta!, reset-meta!, var-get/var-set/var?/alter-var-root all in types.janet + evaluator dispatch arms + core-bindings wrappers. core-meta fixed: (var? x) branch → var-meta, struct? branch → :meta. 10 tests pass. § Phase 4 (deftype/defrecord): deftype instances are tables with :jolt/deftype key (e.g. "user.Point"). Field access via (. obj field), mutation via (set! (.-field obj) val) — reader parses .-field as (. -field obj) in array form. core-map? recognizes table+deftype. core-count skips :jolt/deftype key. core-defrecord emits (deftype ...) + ->TypeName arrow factory + map->TypeName factory (deferred). 11 tests pass including record equality. 317 total, 0 fail. § Key implementation facts: find-var MUST be placed after ctx-find-ns in types.janet (forward-reference). intern dispatch arm needs eval-form on args. core-meta: check (var? x) before (struct? x) — var-meta returns metadata for vars. core-binding uses array-map (plain struct) not hash-map/PHM — PHM's phm-get incompatible with var-get in push-thread-bindings. § Phase 5 (Multimethods + hierarchy): Not yet started. defmulti/defmethod exist in evaluator.janet (lines 611-656) but are routed to interpreter in compile mode. core-derive, core-isa?, core-ancestors, core-descendants are stubs in core.janet.