Phase 13: Protocol Completion — reify dispatch, #() reader, IFn protocol
- reader.janet: rewrite read-anon-fn to handle % arg references % → gensym, %1/%2 → sorted gensyms, replaces all matching % refs - evaluator.janet: IFn protocol support in default invocation arm Before erroring "Cannot call X as a function", checks for: 1) type-registry IFn/-invoke method (extend-type protocols) 2) :jolt/protocol-methods :-invoke (reified objects) - test/phase13-test.janet: 4 test sections (28-31) 28: reify dispatch — protocol methods on reified objects 29: #() anon-fn — % and %1/%2 arg handling 30: extend-type — protocol method dispatch for deftypes 31: clojure.walk loading — keywordize-keys loads correctly - All pass: 316 ok, 1 fail (pre-existing, unchanged)
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Yogthos
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7 changed files with 130 additions and 44 deletions
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Protocol system: Type registry in context env (:type-registry) maps type-tag→proto-name→method-name→fn. Three dispatch special forms: protocol-dispatch (resolves method via registry or reified methods), register-method (stores impl in registry), make-reified (creates anonymous object with :jolt/protocol-methods). fn* forms emitted by extend-type/extend-protocol MUST be @[...] (array) for eval-list dispatch. Protocols are maps with :jolt/type :jolt/protocol and :methods map.
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§
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Project stats after Phase 10: 7,370 total lines across 35 source/test files. Key sources: compiler.janet (869 lines), evaluator.janet (869 lines), core.janet (1373 lines), types.janet (441 lines), reader.janet (463 lines), main.janet (125 lines), api.janet (93 lines), loader.janet (79 lines), phm.janet (199 lines). Test suite: 315 ok, 2 fail (pre-existing SciVar bootstrap + array/table/buffer errors). 9 .clj standard library modules under src/jolt/clojure/ and src/jolt/jolt/. All tests run via `jpm test`.
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§
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REPL print-value uses buffer-based output: write-value/v buf appends formatted strings via buffer/push-string, then print-value creates buffer, builds string, and does a single (print (string buf)). This prevents Janet C runtime from interleaving native <tuple 0x...> output between prin statements in jpm build executables. Cond catch-all must use true clause: Janet's cond treats plain expressions as tests, so (push-str buf (string v)) at end of cond would be evaluated as a test — need true before it.
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§
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Post-Phase 11: 316 passing, 1 fail (pre-existing array/table/buffer in SCI lang.cljc, deferred to Phase 15). 7,800+ lines across ~20 source/test files. 9 .clj stdlib modules (clojure/string.clj, set.clj, walk.clj, zip.clj, edn.clj, java_io.clj; jolt/interop.clj, shell.clj, http.clj). 85 CLJS-ported assertions. SCI stub file at src/jolt/clojure/sci/lang_stubs.clj provides 5 protocols + 3 deftypes. 24 test files. All builds/runs via `jpm test`.
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§
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Project stats after Phase 12: 7,800+ lines across 30+ source/test files. Key sources: compiler.janet (848 lines), evaluator.janet (869 lines), core.janet (1387 lines), types.janet (441 lines), reader.janet (472 lines), phm.janet (199 lines), main.janet (125 lines), api.janet (93 lines), loader.janet (79 lines). Test suite: 316 ok, 1 fail (pre-existing deftype in lang.cljc). 17 CLJS-ported test files + 6 custom test files. 9 .clj standard library modules under src/jolt/clojure/ and src/jolt/jolt/. All builds/runs via `jpm test`.
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§
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Protocol system: Type registry in context env (:type-registry) maps type-tag→proto-name→method-name→fn. Three dispatch special forms: protocol-dispatch (resolves method via registry or reified methods), register-method (stores impl in registry), make-reified (creates anonymous object with :jolt/protocol-methods). fn* forms emitted by extend-type/extend-protocol MUST be @[...] (array) for eval-list dispatch. Protocols are maps with :jolt/type :jolt/protocol and :methods map.
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@ -1,5 +1,5 @@
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Clojure .clj source files loaded via eval-form cannot have docstrings. If a defn form has 5 elements (defn, name, docstring, params, body), the evaluator's defn macro handler gets 4 args instead of 3, breaking with "macro arity mismatch". All .clj files in src/jolt/clojure/ must use 4-element defn forms: (defn name [params] body). Docstrings on defn are a Clojure feature not supported by Jolt's defn macro.
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§
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PHM internal key leak: Core functions iterating over PHM maps with keys/pairs get internal metadata keys (:jolt/deftype, :cnt, :buckets, :_meta). Always check for set?/phm? first and use type-aware helpers (phm-to-struct, phs-seq, phm-keys, phm-entries) before generic iteration. Hit us in core-merge, core-reduce, core-every?, core-filter which all needed set?/phm? checks added.
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§
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Janet `and` returns last truthy value, not boolean. `(and table? deftype)` returns the deftype string, not true. Predicate-like functions (core-map?, core-contains?, etc.) that check type tags via `(and ...)` must wrap in `(if ... true false)`. Hit us with core-map? returning the deftype string instead of boolean true for record instances. Also hit type-satisfies? which had to replace `(boolean ...)` (nonexistent) with `(if ... true false)`.
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§
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Janet `and` returns last truthy value, not boolean. `(and table? deftype)` returns the deftype string, not true. Predicate-like functions (core-map?, core-contains?, etc.) that check type tags via `(and ...)` must wrap in `(if ... true false)`. Examples: core-map? returning deftype string instead of boolean true for record instances. Also applies to type-satisfies? which must use `(if (and ...) true false)` — Janet has no `boolean` function.
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§
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Clojure .clj source files loaded via eval-form cannot have docstrings. If a defn form has 5 elements (defn, name, docstring, params, body), the evaluator's defn macro handler gets 4 args instead of 3, breaking with "macro arity mismatch". All .clj files in src/jolt/clojure/ must use 4-element defn forms: (defn name [params] body). Docstrings on defn are a Clojure feature not supported by Jolt's defn macro.
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@ -2,44 +2,22 @@
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"jolt-gotchas": {
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"created_by": "agent",
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"use_count": 4,
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"view_count": 240,
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"view_count": 256,
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"patch_count": 4,
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"last_used_at": "2026-06-03T16:12:06.850822+00:00",
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"last_viewed_at": "2026-06-03T16:51:46.822185+00:00",
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"last_viewed_at": "2026-06-03T17:19:39.580796+00:00",
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"last_patched_at": "2026-06-03T16:12:23.546648+00:00",
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"created_at": "2026-06-03T03:50:41.474730+00:00",
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"state": "active",
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"pinned": false
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},
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"jpm-build": {
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"created_by": "agent",
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"use_count": 0,
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"view_count": 252,
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"patch_count": 0,
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"last_viewed_at": "2026-06-03T16:51:46.833321+00:00",
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"created_at": "2026-06-01T20:56:39.144222+00:00",
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"state": "active",
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"pinned": false
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},
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"jolt-compiler": {
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"created_by": "agent",
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"use_count": 12,
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"view_count": 253,
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"patch_count": 10,
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"last_used_at": "2026-06-03T16:35:41.304993+00:00",
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"last_viewed_at": "2026-06-03T16:51:46.810154+00:00",
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"last_patched_at": "2026-06-03T16:13:25.725903+00:00",
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"created_at": "2026-06-02T17:54:38.690279+00:00",
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"state": "active",
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"pinned": false
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},
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"jolt-bootstrap": {
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"created_by": "agent",
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"use_count": 9,
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"view_count": 261,
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"view_count": 277,
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"patch_count": 10,
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"last_used_at": "2026-06-02T18:45:23.336653+00:00",
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"last_viewed_at": "2026-06-03T16:51:46.804059+00:00",
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"last_viewed_at": "2026-06-03T17:19:39.564734+00:00",
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"last_patched_at": "2026-06-02T03:44:45.935676+00:00",
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"created_at": "2026-06-01T21:49:51.101718+00:00",
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"state": "active",
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@ -48,22 +26,44 @@
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"jolt-persistent-structures": {
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"created_by": "agent",
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"use_count": 3,
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"view_count": 240,
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"view_count": 256,
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"patch_count": 0,
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"last_used_at": "2026-06-03T16:13:31.440242+00:00",
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"last_viewed_at": "2026-06-03T16:51:46.828298+00:00",
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"last_viewed_at": "2026-06-03T17:19:39.585778+00:00",
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"created_at": "2026-06-03T03:35:04.130959+00:00",
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"state": "active",
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"pinned": false
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},
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"jpm-build": {
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"created_by": "agent",
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"use_count": 0,
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"view_count": 268,
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"patch_count": 0,
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"last_viewed_at": "2026-06-03T17:19:39.591024+00:00",
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"created_at": "2026-06-01T20:56:39.144222+00:00",
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"state": "active",
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"pinned": false
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},
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"jolt-compiler": {
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"created_by": "agent",
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"use_count": 12,
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"view_count": 269,
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"patch_count": 10,
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"last_used_at": "2026-06-03T16:35:41.304993+00:00",
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"last_viewed_at": "2026-06-03T17:19:39.570381+00:00",
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"last_patched_at": "2026-06-03T16:13:25.725903+00:00",
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"created_at": "2026-06-02T17:54:38.690279+00:00",
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"state": "active",
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"pinned": false
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},
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"jolt-dev": {
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"created_by": "agent",
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"use_count": 39,
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"view_count": 291,
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"patch_count": 47,
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"last_used_at": "2026-06-03T16:35:41.292589+00:00",
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"last_viewed_at": "2026-06-03T16:51:46.816038+00:00",
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"last_patched_at": "2026-06-03T16:36:06.347582+00:00",
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"use_count": 40,
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"view_count": 308,
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"patch_count": 48,
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"last_used_at": "2026-06-03T17:02:10.695363+00:00",
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"last_viewed_at": "2026-06-03T17:19:39.575770+00:00",
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"last_patched_at": "2026-06-03T17:02:24.207040+00:00",
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"created_at": "2026-06-01T21:26:06.614465+00:00",
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"state": "active",
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"pinned": false
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@ -36,6 +36,12 @@ janet test/phase10-test.janet # standard library
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printf "(range 10)\n[1 2 3]\n{:a 1}\n" | janet src/jolt/main.janet
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```
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## Test File Creation — Heredoc Workaround
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The `write` tool's syntax checker rejects `.janet` files with complex string escaping (e.g., `\"` inside Janet strings). **Workaround:** Use `bash` with `cat > file << 'EOF' ... EOF` heredocs for any test file containing Clojure source strings.
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**Paren-counting boundary:** Large single-file test suites (>6 sections) often hit a mysterious paren-counting parse error ("unexpected end of source") at section boundaries, even when parens are balanced. **Workaround:** Split into multiple files (e.g., `cljs-port-1a.janet`, `cljs-port-1b.janet`).
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## Loading .clj Files
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`.clj` files are loaded via `eval-form` in the interpreter:
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