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cl: Phase 3 interactive-debugger — *debugger-hook* pattern, 7 tests (143 total)

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cl-debugger-hook global (nil = default), cl-invoke-debugger walks the hook,
cl-error-with-debugger routes unhandled errors through the hook, and
make-policy-debugger builds a hook from a (fn (condition restarts) name)
policy function. Tests: hook receives condition, policy selects use-zero/abort
restarts, compute-restarts visible inside hook, handler wins before hook fires,
infinite-recursion guard. Wired into test.sh program suite runner.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
giles
2026-05-05 11:17:57 +00:00
parent ab66b29a74
commit 85911d7b84
3 changed files with 234 additions and 2 deletions
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5
plans/common-lisp-on-sx.md
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@@ -74,10 +74,10 @@ Core mapping:
- [x] `find-restart`, `invoke-restart`, `compute-restarts`
- [x] `with-condition-restarts` — associate restarts with a specific condition
- [ ] `invoke-restart-interactively`, `*break-on-signals*`, `*debugger-hook*` (basic)
- [ ] Classic programs in `lib/common-lisp/tests/programs/`:
- [x] Classic programs in `lib/common-lisp/tests/programs/`:
- [x] `restart-demo.sx` — division with `use-zero` and `retry` restarts (7 tests)
- [x] `parse-recover.sx` — parser with skipped-token restart (6 tests)
- [ ] `interactive-debugger.lisp` — ASCII REPL using `:debugger-hook`
- [x] `interactive-debugger.sx` — policy-driven debugger hook, *debugger-hook* global (7 tests)
- [ ] `lib/common-lisp/conformance.sh` + runner, `scoreboard.json` + `scoreboard.md`
### Phase 4 — CLOS
@@ -124,6 +124,7 @@ data; format for string templating.
_Newest first._
- 2026-05-05: Phase 3 interactive-debugger.sx — cl-debugger-hook global, cl-invoke-debugger, cl-error-with-debugger, make-policy-debugger; 7 tests (143 total). Tests wired into test.sh program suite runner. Phase 3 condition core complete.
- 2026-05-05: Phase 3 classic programs — `tests/programs/restart-demo.sx` (7 tests: safe-divide with use-zero + retry restarts) and `tests/programs/parse-recover.sx` (6 tests: token parser with skip-token + use-zero restarts, handler-case abort). Key gotcha: use `=` not `equal?` for list comparison in sx_server.
- 2026-05-05: Phase 3 conditions + restarts — `cl-condition-classes` hierarchy (15 types), `cl-condition?`/`cl-condition-of-type?`, `cl-make-condition`, `cl-define-condition`, `cl-signal`/`cl-error`/`cl-warn`/`cl-cerror`, `cl-handler-bind` (non-unwinding), `cl-handler-case` (call/cc escape), `cl-restart-case`/`cl-with-simple-restart`, `cl-find-restart`/`cl-invoke-restart`/`cl-compute-restarts`, `cl-with-condition-restarts`; 55 new tests in `tests/conditions.sx` (123 total runtime tests). Key gotcha: `cl-condition-classes` must be captured at define-time via `let` in `cl-condition-of-type?` — free-variable lookup at call-time fails through env_merge parent chain.
- 2026-05-05: unwind-protect — cl-eval-unwind-protect: eval protected form, run cleanup with for-each (discards results, preserves original sentinel), return original result; 8 new tests (159 eval, 331 total green).