The reader dropped the namespace on ::kw (read ::foo as :foo), so auto-resolved
keywords never matched their qualified form — code that round-trips them (spec
keys, aero's :aero.core/* expansion keys) silently broke. Resolve ::name against
the current ns and ::alias/name through the alias table, as Clojure does. The
runtime loader reads form-by-form with the ns set after the ns form; the
cross-compile reads all forms up front, so ei-emit-ns*/ei-emit-ns-records set the
ns before reading.
clojure.edn/read over a reader discarded its opts map — :readers/:default/:eof
were ignored, so a custom :default never saw the tag. Route the reader arity
through read-string so opts apply, and pass the tag to :default as a symbol (not
the internal :#name keyword), matching Clojure.
Seed re-minted (the ::halt transducer key in clojure.core now reads as
:clojure.core/halt). Corpus gains ::-keyword rows; the unit case that asserted the
old ns-dropping behavior now asserts the qualified result.
natives-parity.ss was a grab-bag (its own header called it 'parity'). Dissolve it
into homes that say what they hold:
- cat -> natives-transduce.ss (was natives-xform.ss, renamed for the
whole transducer surface: volatiles + cat + transduce/sequence)
- transient? -> transients.ss
- rseq -> natives-seq.ss
- hash family -> natives-misc.ss (the public hash API over jolt-hash)
The remainder — the #?() feature set, the reader-conditional + re-matcher tagged-map
ctors, and macroexpand — is a coherent reader/macro runtime-support unit, kept as
natives-reader.ss (np- prefix -> nr-). rt.ss loads + two comment refs updated.
Runtime .ss, no re-mint. make test green; hash/transient?/rseq/cat/macroexpand and
#?() reader features all verified.
Rename src/jolt -> stdlib (the runtime-loaded layer; jolt-core stays the
seed-baked layer) and update the loader / emit-image / doc paths. Drop dead
code: the spike/ experiments, the duplicate clojuredocs-export.edn (json moves
to tools/), the Janet-era jolt.http binding, and the orphaned
persistent_vector.clj whose ns/path didn't even match.
Strip porting residue from comments and docstrings across host/chez, jolt-core,
stdlib, tests, and docs: internal issue ids, "Phase N" markers, and the "vs
Janet" historical exposition, leaving present-tense descriptions and the real
JVM-Clojure semantic contrasts. Same pass over the corpus suite labels. The seed
is unchanged (docstrings/comments aren't emitted), so the self-host fixpoint and
corpus are untouched.
Port tools/spec_coverage.py off the dead janet probe to bin/joltc and regenerate
coverage.md; drop the dead :host/janet rule from certify.clj and regenerate the
conformance profile. Add docs/host-interop.md (the JVM shims and how to register
your own host class from a library) and a writing-style note in CLAUDE.md.
Stabilize the four racy concurrency corpus cases (future-cancel and agent
send/send-off): give the future a sleeping body and the agent a slow action, so
cancel reliably catches an in-flight future and deref reliably reads the
pre-update snapshot. They certify deterministically now, so drop their :flaky
allowlist entries and the orphaned legend.
- java.text.SimpleDateFormat.parse parses the RFC1123/1036/asctime patterns
(day/month names, 2-digit-year sliding window, tz token), and .format renders
z/Z/X timezone tokens (GMT/+0000/Z) instead of emitting them literally. Date
gains toLocalDate/toLocalDateTime/before/after/equals. Fixes ring.util.time.
- read / read+string work over a host java.io reader (StringReader wrapped in a
PushbackReader): drain, parse one form, push the tail back. Fixes cuerdas
istr / << string interpolation (and selmer's <<), which read embedded forms
from the template via (read pushback-reader).
Shake-out from the conformance-library sweep. Host-side fixes (runtime .ss,
no re-mint) plus one analyzer change (re-minted):
- Exception fidelity: ex-info and host-constructed throwables (RuntimeException.
etc.) now carry their JVM class, so (class e), instance? across the exception
hierarchy, .getMessage, and clojure.test thrown?/thrown-with-msg? all work.
- .getBytes returns a seqable/countable byte-array and honors UTF-16/UTF-32;
String. decodes them. ->bytevector accepts byte-arrays (Base64).
- Universal .getClass / .toString / .indexOf / .lastIndexOf on any value/seq.
- record? uses the host jrec? predicate (the old (get x :jolt/deftype) crashed
on a sorted-map by invoking its comparator).
- extend-protocol to abstract host types (clojure.lang.Fn/IFn/APersistentVector,
java.net.URI) dispatches.
- New host classes: clojure.lang.PersistentQueue, java.util.ArrayList,
java.net.URI, java.io.File / java.util.UUID ctors, Double/Float ctors+statics,
regex instance? Pattern, System/setProperty.
- *assert* / *print-readably* are real settable/bindable vars.
- (symbol "ns/name") splits the namespace at the last slash.
- letfn fn params desugar destructuring (analyzer; re-minted).
unit.edn gains exinfo/hostobj/queue/hostctor/destructure regression rows.
A vector's seq is now a real chunked-seq (chunked-seq? true), matching Clojure/
CLJS. Each vector-seq cell carries its backing vector + element index as two
cseq fields (cvec/ci, no extra allocation vs the old lazy cell), so:
- chunk-first hands out a 32-element block (a pvec slice), chunk-rest is the
seq at the next block boundary — the ChunkedSeq contract (chunk-first ++
chunk-rest == the seq);
- reduce/transduce take a fast path that walks the backing vector by index in
a tight loop with no per-element seq cells (reduce over a 1M-vector ~0.4s).
The seq cell stays a cseq, so first/rest/count/printing and the ~26 cseq?
dispatch sites are untouched. The eager chunk-buffer model (chunk-buffer/chunk/
chunk-cons) is preserved for the round-trip case. No seed change (runtime only).
jolt was all-flonum (one :number type, inherited from Janet whose only number
type is a double). The Chez runtime has a full numeric tower, so the zero-Janet
path now carries it = JVM Clojure semantics:
(/ 1 2) => 1/2 (exact Ratio, was 0.5)
(integer? 3) => true (integer? 3.0) => false (float? 3.0) => true
(ratio? (/ 1 2)) => true (= 3 3.0) => false (== 3 3.0) => true
(+ 1 2) => 3 (exact) (/ 1.0 2) => 0.5 (double)
jolt= was already exactness-aware (values.ss) and == is value-equality, so
=/== match the JVM split. The reader preserves exactness (integer literals exact,
a/b ratios exact rationals, decimals/exponents flonums); backend_scheme emit-const
renders exact ints/ratios and flonums faithfully; the value-position arithmetic,
count, int, compare, bit ops, parseLong, string .length/.indexOf, range,
timestamps, and array bytes return exact integers (= JVM int/long) instead of
coercing to flonum. double/parseDouble/clojure.math floor|ceil|signum stay double.
Only the zero-Janet path carries the tower (the Janet reader loses exactness into
a double before emit). The prelude/all-flonum path is unaffected for compiled code;
the runtime reader is shared, so a couple of all-flonum reader assertions become
value (==) assertions. ~16 numeric corpus cases now give the JVM tower value vs the
Janet-era :expected and are allowlisted as tower divergences (Chez == reference
JVM) pending the corpus flip to JVM (jolt-ecz0). No BigDecimal type (1M).
Re-minted. zero-janet 2682 (floor 2698->2682, the reclassified tower cases), 0 new
divergences; fixpoint 10/10, bootstrap 6/6, spine 35/35, cli 49/49; Janet gate 155
files 0 failed.
realized? threw 'not supported on' for a jolt-lazyseq record (the overlay
reads :jolt/type); add a jolt-lazyseq? arm to the post-prelude wrapper
reading the record's own realized? flag.
conj! 1-arity (conj! coll) is the transducer-completion arity and returns
coll as-is on the JVM, no transient check — we threw 'not a transient'.
Both gates: zero-janet 2696->2698, prelude 2649->2652, 0 new divergences.
Audit of the janet.*/jolt.interop/STM corpus cases vs Chez equivalents: the Janet
FFI-bridge cases (janet/string, janet/type, janet.math/sqrt, janet.string/ascii-
upper) test functionality already covered by PORTABLE corpus cases (str 29, type 9,
sqrt 3, upper-case 9), so they're safe to delete in Phase 5. Two needed a Chez
equivalent so they pass instead of being lost:
- clojure.lang.LockingTransaction/isRunning -> false (no STM on jolt).
- line-seq: the corpus case used janet/spit setup but was the SOLE line-seq
coverage (0 other cases). Ported janet/spit->spit, and added a native Chez
line-seq (drain a jhost io/reader + split on newline; no trailing empty line)
that delegates a Janet map-reader to the overlay version.
zero-Janet 2694->2696, prelude floor 2648; self-host + Janet gate + JVM cert green.
jolt-cf1q.7 jolt-0obq
Date/time (inst-time.ss): java.util.Date / java.sql.Timestamp ctors accept ms or
another date value (ms-of) -> a jinst; java.text.SimpleDateFormat (pattern + .format
via the existing format-ms UTC engine; .setTimeZone accepted); java.util.TimeZone/
getTimeZone. instance? answers Date true / Timestamp false for a jinst (a Date is
not a Timestamp on the JVM).
clojure.edn/read over a reader (io.ss + post-prelude): the overlay edn.clj's
drain-reader is janet/type-coupled, so Chez drains the jhost StringReader/
PushbackReader to a string and reads the first EDN form. Unblocks jolt-uicd.
Native Chez throughout (no vendoring): Chez date arithmetic + string ports. zero-Janet
2688->2692, 0 new divergences; self-host + Janet gate + JVM cert green.
jolt-cf1q.7 jolt-dcmm jolt-7t3l jolt-uicd
Add a thread-safe delay type (concurrency.ss): make-delay wraps a thunk; deref/
force run it once under a lock and cache (JVM delays are thread-safe + memoized).
delay? and realized?-on-a-delay are native; the overlay's `delay` macro
(-> make-delay) and `force` (-> deref) now work. realized? wrapper (post-prelude)
and the deref chain gain a delay arm. Removed the np-delay? stub from
natives-parity.ss (the real type lives in concurrency.ss).
Seed unchanged (no re-mint). zero-Janet 2673->2685, 0 new divergences; Janet gate
+ JVM cert green.
jolt-cf1q.7
Replace the Janet synchronous agent shim (agent = atom, send applies inline) with
JVM-style async agents: send/send-off enqueue an action and a single worker thread
per agent applies them in order; deref reads the current (maybe not-yet-updated)
state without blocking; await blocks until the queue drains. A validator rejection
or a thrown action puts the agent in an error state (agent-error) and halts the
queue; restart-agent clears it. send and send-off share one serialized worker (a
superset of the JVM's fixed/cached pool split). Native versions re-asserted in
post-prelude over the overlay; await/restart-agent are new.
Corpus: the two "send/send-off applies" cases do (send a f) (deref a) with no
await, so they now read state before the action runs — diverging like the JVM
(the suite was literally "synchronous shim"). Allowlisted on both gates; floors
-2 (zero-Janet 2569->2567, prelude 2559->2557). cli-test covers async agents via
await (ordered 100-send dispatch, error capture) — 49/49. Janet gate + JVM cert
green; 0 new divergences on either corpus.
jolt-byjr
future/future-call run the body on a native thread (fork-thread) over the SAME
heap — JVM semantics, not Janet's isolated-heap snapshot. deref blocks on a
mutex+condition latch; timed (deref f ms val) uses an absolute deadline.
promise is a real blocking promise (deref parks until deliver), replacing the
Janet non-blocking atom shim. future?/future-done?/future-cancelled?/future-cancel
/realized? are native (the overlay versions read Janet map keys); re-asserted in
post-prelude over the overlay. pmap/pcalls/pvalues (overlay, over future) light
up for free.
Thread-safety this forces:
- atoms get a per-atom mutex; swap!/swap-vals! are a JVM-style CAS loop (f runs
outside the lock, so a watch/validator can deref the same atom); reset!/
compare-and-set! are atomic.
- the dynamic binding stack becomes a Chez thread-parameter, so each future/thread
has its own; Chez inherits it at fork, giving binding conveyance (the shim also
installs an explicit snapshot).
- Thread/sleep really sleeps now (a worker sleeping doesn't block the parent).
Re-minted the seed: future-call now resolves at compile time, so pmap compiles to
a var-deref instead of the host-static-call fallback that crashed. image.ss
unchanged.
Corpus: the 2 snapshot cases now match the JVM (shared) not Janet (isolated) —
allowlisted on both Chez gates; the two racy future-cancel cases allowlisted;
"promise undelivered" (blocks on JVM/Chez, profile :bucket :timeout) skipped like
:throws. Zero-Janet corpus 2544 -> 2569, 0 new divergences, floor raised. Full
Janet gate + JVM cert green.
jolt-byjr
The Chez atom record gains watches (an alist of key->fn) and validator
slots. swap!/reset! now validate the candidate value before storing and
notify watches after, in the seed's order (core_refs.janet) — the watch fn
is called (key ref old new). compare-and-set!/swap-vals!/reset-vals! route
through reset!/swap! so they validate + notify too.
add-watch/remove-watch/set-validator!/get-validator are native here and
re-asserted in post-prelude.ss: the clojure.core overlay implements them via
jolt.host/ref-put! on (get atom :watches), a Janet-table mutation a Chez atom
record can't answer, so its def-var! would otherwise clobber these. set-
validator! validates the current value immediately (Clojure throws if already
invalid).
Parity 2150 -> 2154, 0 new divergences. New test/chez/_atomwatch.janet 10/10.
The (class x) native and the clojure.walk port were explored this increment
but deferred: class alone makes the String-class-token corpus cases emit-and-
run with a wrong value (the bare token doesn't resolve yet) — filed jolt-13zk
to land the native together with token resolution; clojure.walk is blocked on
list? + map-entry-as-vector (jolt-75sv).
Reimplement the ctx-coupled seed ns natives over the rt.ss var-table, since
Chez has no ctx. host/chez/ns.ss adds a jns namespace value + a registry and
binds find-ns/the-ns/create-ns/in-ns/all-ns/ns-publics/ns-map/ns-interns/
ns-aliases/resolve/find-var/ns-unmap/*ns* into clojure.core.
The resolve friction: native-ops (+, map, …) are inlined at emit so they have
no var-cell, and (resolve '+) was nil — diverging from Clojure where it's a
var. Added a defined? flag to the var-cell record (set by def-var!/declare-var!,
left false on a lazily-materialised forward ref) and def-var!'d every native-op
name to its value-position proc, so resolve returns the cell iff genuinely
defined. ns-unmap clears the flag. resolve never interns an empty cell
(var-cell-lookup is non-creating).
ns-name is overridden natively in post-prelude (the overlay reads
(get ns :name), nil on a jns record); the printers render a namespace as its
name. *ns* binds to the user ns; in-ns re-binds it. use/require cross-ns
switching stays deferred to Phase 3 (the analyzer bakes a def's target ns at
compile time).
Prelude parity 1951 -> 1969, 0 new divergences; four now-passing allowlist
entries dropped (ns *ns* cases + str-of-a-var). New focused gate test/chez/
_ns.janet (19 cases, expectations from the JVM-canonical build/jolt).
inc I (jolt-n7rz) — vars as first-class objects. (var x)/#'x lowered a
:the-var IR op the Chez emitter didn't handle (57 emit-fails, the biggest
bucket); emit it to the rt.ss var-cell and shim the static var ops in
vars.ss: var?/var-get/deref/var-as-IFn/var =/pr-str (#'ns/name) + a native
bound? (the overlay reads (get v :root), nil on a var-cell record). def now
RETURNS the var (#'ns/name) like Clojure — def-var!/declare-var! yield the
cell, not the value — so (var? (def x 1)) is true and pr-str-of-var/defn
pass (un-allowlisted). Dynamic binding (binding/with-bindings*/var-set/
thread-bound?) stays a follow-up; those crash on nil host prims (safe).
Var def-time metadata (^:private/^Type/doc) isn't captured yet — allowlisted.
inc J (jolt-snry) — scalar natives. natives-misc.ss: a juuid record
(random-uuid v4 / parse-uuid / uuid? / #uuid pr-str / str), a %-format
engine (%d/%s/%.Nf/%x/%c/%%; printf rides on it), a jtagged record
(tagged-literal + :tag/:form + #tag pr-str), bigint/biginteger as
near-identity over the all-flonum model. Overlay names (uuid?/random-uuid/
parse-uuid/tagged-literal?) re-asserted in post-prelude.ss.
Prelude parity 1898 -> 1951, 0 new divergences. Floor raised to 1951.
sequence and transduce were seed natives nil on the prelude; the stateful
transducer arities (take-nth/map-indexed/partition-by, overlay) drive a
volatile via volatile!/vswap!/vreset!/deref, also unshimmed — so the whole
(sequence xform coll) / (transduce xform f coll) surface crashed.
natives-xform.ss: native volatiles (a jvol record + volatile!/vreset!/
vswap!/volatile? + a deref arm); transduce/sequence built on the existing
into-xform / reduce-seq. The overlay vreset!/vswap!/volatile? drive a
volatile through ref-put!/:jolt/type (tagged-table only), so they're
overridden natively in post-prelude.ss.
driver.janet: drain each chez pipe to EOF instead of a single ev/read. A
program with a stdout side effect (newline) flushes in two writes and a
lone ev/read sometimes caught only the first chunk, dropping the trailing
value — an intermittent gate divergence. Now reads until the pipe closes.
Prelude parity 1886 -> 1898, 0 new divergences. Floor raised to 1898.
Emit every non-macro clojure.core form through the live analyzer -> Chez emit
pipeline as a def-var! prelude (prelude mode, tier dependency order), load it
before a user expression, and you get an -e-capable jolt-chez: analysis on Janet,
execution on Chez. driver/emit-core-prelude assembles it (each form behind a
silent load guard so the Phase-2 multimethod forms don't break the rest);
bin/jolt-chez is the -e CLI, caching the prelude on disk keyed by source hash.
run-corpus-prelude.janet is the full parity gate this opens, the prelude-backed
sibling of run-corpus-chez. First baseline: 1220/2497 evaluated cases pass, 0 new
divergences (10 allowlisted: dynamic vars, class names, eval-order — deferred
Phase 2). The rest is the punch-list: ~360 emit-fail (real host interop, out of
the analyzer subset) and ~900 runtime crashes, mostly core fns calling
host-coupled seed natives with no Chez shim yet (str/format/vec, transients).
Follow-ups jolt-t6cr/kl2l/q3w8/9ls5.
Two shims landed to get the prelude to load and run. atoms.ss: atom/deref/swap!/
reset! (+ the compare/vals kernel) — needed at load time for
global-hierarchy = (atom (make-hierarchy)). predicates.ss: the type predicates +
name/namespace/boolean the overlay assumes are seed natives, matching the seed's
strict semantics. post-prelude.ss re-asserts char?/atom? after the prelude: the
overlay implements those by reading :jolt/type, which is false for Chez-native
chars/atoms, so its def-var! would clobber the correct native versions.
Per-case Scheme files are PID-unique so a foreground -e never reads a half-written
file while the gate runs.
