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spec: string-buffer primitive — make-string-buffer/append!/->string/length

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OCaml: StringBuffer of Buffer.t in sx_types.ml; 5 primitives in
sx_primitives.ml (make-string-buffer, string-buffer?, string-buffer-append!,
string-buffer->string, string-buffer-length); inspect case added.

JS: SxStringBuffer with array+join backend; _string_buffer marker for
typeOf dispatch and dict? exclusion (also excludes _vector from dict?).

spec/primitives.sx: 5 define-primitive entries.
17/17 tests pass on both OCaml and JS.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
giles
2026-04-26 17:05:05 +00:00
parent cc0af51921
commit d98b5fa223
7 changed files with 190 additions and 4 deletions
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5
plans/agent-briefings/primitives-loop.md
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@@ -152,8 +152,10 @@ using call/cc+perform/resume.
Fix O(n²) string concatenation in loops across Lua, Ruby, Common Lisp, Tcl.
- [ ] Spec + OCaml: add `make-string-buffer`, `string-buffer-append!`, `string-buffer->string`,
- [x] Spec + OCaml: add `make-string-buffer`, `string-buffer-append!`, `string-buffer->string`,
`string-buffer-length` to primitives. OCaml: `Buffer.t` wrapper. JS: array+join.
Also: string-buffer? predicate; SxStringBuffer._string_buffer marker for typeOf/dict?
exclusion; inspect case in sx_types.ml. 17/17 tests OCaml+JS.
- [ ] Tests: 15+ tests.
- [ ] Commit: `spec: string-buffer primitive`
@@ -676,6 +678,7 @@ Brief each language's loop agent (or do inline) after rebasing their branch onto
_Newest first._
- 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.
- 2026-04-26: Phase 4 complete — coroutine primitive fully landed (4 commits: spec library + OCaml verified + JS pre-load + 27 tests). Phase 5 (string buffer) next.
- 2026-04-26: Phase 4 Tests step done — 27 tests total (10 new: state field inspection, yield-from-helper, initial-arg-ignored, mutable-closure, complex-values, round-robin, factory-no-state, non-coroutine-error). 27/27 OCaml+JS.
- 2026-04-26: Phase 4 JS step done — all CEK primitives already in sx-browser.js; fix was pre-loading spec/coroutines.sx+spec/signals.sx in run_tests.js so (import (sx coroutines)) resolves synchronously. 17/17 coroutine tests pass JS. 1965/2500 total (+25), zero new failures.