coop/rose-ash
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

spec: define-type special form — constructors, predicates, accessors (20 tests)

Browse Source 
Adds sf-define-type via register-special-form! in spec/evaluator.sx.
ADT values are dicts {:_adt true :_type "T" :_ctor "C" :_fields (list ...)}.
Each define-type call registers: ctor functions with arity checking, Name?
type predicate, Ctor? constructor predicates, Ctor-field positional accessors,
and populates *adt-registry* dict with type→[ctor-names] mapping.
20/20 JS tests pass in spec/tests/test-adt.sx.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
giles
2026-04-26 17:56:50 +00:00
parent 3fb0212414
commit 6c87210728
4 changed files with 306 additions and 37 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
plans/agent-briefings/primitives-loop.md
View File

@@ -178,7 +178,7 @@ simulate sum types. A native `define-type` + `match` form eliminates this everyw
CEK dispatch, exhaustiveness warnings via _adt_registry, recursive types, nested patterns,
wildcard _, 3-phase impl plan (basic/nested/exhaustiveness), open questions on accessors/singletons/inspect.
- [ ] Spec: implement `define-type` special form in `spec/evaluator.sx`:
- [x] Spec: implement `define-type` special form in `spec/evaluator.sx`:
`(define-type Name (Ctor1 field...) (Ctor2 field...) ...)`
Creates constructor functions `Ctor1`, `Ctor2` + predicate `Name?`.
@@ -686,6 +686,7 @@ Brief each language's loop agent (or do inline) after rebasing their branch onto
_Newest first._
- 2026-04-26: Phase 6 Spec define-type done — sf-define-type registered via register-special-form! in spec/evaluator.sx; AdtValue as {:_adt true :_type "..." :_ctor "..." :_fields (list ...)}; ctor fns + arity checking + Name?/Ctor? predicates + Ctor-field accessors; *adt-registry* dict populated per define-type call. 20/20 JS tests pass in spec/tests/test-adt.sx. OCaml define-type is next task.
- 2026-04-26: Phase 6 Design done — plans/designs/sx-adt.md written. Covers define-type/match syntax, AdtValue CEK runtime, stepSfDefineType+MatchFrame dispatch, exhaustiveness warnings, recursive types, nested patterns, wildcard _. 3-phase impl plan. Next fire: Spec implement define-type.
- 2026-04-26: Phase 5 complete — string buffer fully landed (d98b5fa2). 17 tests, 17/17 OCaml+JS. Phase 6 (ADTs) next.
- 2026-04-26: Phase 5 Spec+OCaml+JS step done — StringBuffer of Buffer.t in sx_types.ml; make-string-buffer/append!/->string/length/string-buffer? in sx_primitives.ml; SxStringBuffer with _string_buffer marker + typeOf/dict? fixes in platform.py; JS rebuilt. 17/17 tests OCaml+JS.