The closed-world fixpoint (#226) flowed record types across fn boundaries; this
adds a numeric refinement so a hintless fn whose every call site passes a flonum
has its param unboxed to fl-ops, no ^double hint needed.
Lattice gains :double, a flonum refinement of :num: two doubles join to :double,
a double joined with anything else widens to :num — so a param is :double only
when every contributing value is a flonum, which is what makes the fl-op sound.
infer types a flonum literal and flonum arithmetic (+ - * / min max inc dec over
double/int-literal operands) as :double, and the fixpoint joins those across call
sites and return types like any other lattice value.
The bridge to the existing hint-directed pass is a synthetic [param :double]
nhint: wp-infer! stashes the :double params separately from the structural seeds,
and run-passes injects them as nhints before numeric/annotate, so the fl-op
emission and the exact->inexact entry coercion (a no-op on a proven flonum) apply
unchanged.
Sound subset only: :double, never :long — an untyped integer can be a bignum and
fx-ops would overflow/diverge from jolt's arbitrary precision. So an integer
caller leaves a param generic; an escaped fn (unknown callers) keeps :any.
run-numwp.ss gate: cross-fn :double propagation incl. through a flonum-returning
helper, the integer-caller and escape negatives, and the full run-passes path
emitting fl* + entry coercion. make test / shakesmoke green, selfhost holds, 0
new divergences.
Co-authored-by: Yogthos <yogthos@gmail.com>
The devirtualized protocol call emitted find-protocol-method on the inferred
record tag, but a record can satisfy a protocol via an Object/host-tag default
rather than a direct impl — find-protocol-method on its own tag misses that,
while protocol-resolve walks to the default. So a record relying on
(extend-protocol P Object ...) resolved under ordinary dispatch but applied #f
under devirt and crashed. Closed-world opt builds only; the gate previously
covered just direct inline/extend-type impls so it shipped green.
Emit devirt-resolve, which tries the static tag and falls back to
protocol-resolve on a miss — same fast path, correct regardless of how the
record satisfies the protocol. Mirrors jrec-field-at falling back to jolt-get.
The receiver binds to one temp so it feeds the resolve and the application
without double-evaluating a side-effecting arg 0.
Also widen the whole-program fixpoint to :any on hitting the iteration cap: a
non-converged pre-fixpoint is more specific than the least fixpoint, so seeding
it would be unsound. Not reached in practice (~2 passes); a defensive floor.
run-devirt.ss gains an Object-default case. make test / shakesmoke green,
selfhost holds, 0 new divergences.
Co-authored-by: Yogthos <yogthos@gmail.com>
When the inference types a keyword-lookup receiver as a record — it carries the
field-order :shape and :hint :struct from the whole-program fixpoint — the back
end reads the field by its declared slot via jrec-field-at instead of jolt-get.
That skips the jolt-get case-lambda, the dispatch fn, and the field-key
hashtable lookup, leaving a jrec? check + a static-index vector-ref.
jrec-field-at falls back to jolt-get when the receiver isn't the expected record
(a map downgraded by dissoc, or a value the inference mistyped), so it stays
correct if the static type is wrong. Only the no-default form takes the bare
path (a declared field is always present).
Sound only for non-nil records: a self-recursive param that can be nil (e.g.
binary-trees check-tree, whose untagged child is nil at leaves) types :any and
keeps jolt-get — the whole-program fixpoint demotes it. The target is non-nil
record params, like a Vec3 dot product (~5% there; boxed-flonum arithmetic
dominates the rest, a separate numeric lever).
run-fieldread.ss gate: emitted form uses jrec-field-at at the right slot and
matches jolt-get for each declared field; a non-field key and a default-arg form
keep the generic path. make test / shakesmoke green, 0 new divergences.
Co-authored-by: Yogthos <yogthos@gmail.com>
When the inference proves a protocol call's receiver is one record type, the
back end resolves the impl by that static tag (find-protocol-method) instead of
routing through the protocol var -> jolt-invoke -> protocol-resolve, which
re-derives the tag and walks the type table. Same table lookup, minus the
var-deref, the rest-cons, and the receiver-type computation.
Fires only on a monomorphic site: a megamorphic receiver joins to :any and
carries no :devirt-type, so it keeps ordinary dispatch (the dispatch bench is
unaffected). The annotation comes from the whole-program fixpoint typing a
reduce/HOF element or a ctor return as a specific record.
Modest on the dispatch benchmarks (~6% on mono-dispatch) — float boxing in the
reduce accumulator dominates there, a separate numeric lever — but it removes
the dispatch overhead wherever a typed receiver is known.
run-devirt.ss gate: emitted form uses find-protocol-method, and evaluating it
matches ordinary dispatch for an inline impl, an extend-type impl, and the
non-devirt path. make test / shakesmoke green, 0 new divergences.
Co-authored-by: Yogthos <yogthos@gmail.com>
Re-derive each app fn's param types from its call sites under --opt, so a
record type flows across fn boundaries: a ctor's return reaches a callee
param, and a typed vector's element reaches a HOF closure's param. The back
end can then bare-index field reads and devirtualize protocol calls at those
sites (it reads the resulting :hint/:devirt annotations; consuming them is
separate work).
This rebuilds the inter-procedural driver the Janet host had — the API
(infer-body/reinfer-def) survived the rehost but nothing drove it, and the
record-shapes/protocol-methods registries were empty stubs.
- records.ss: populate record-shapes (ctor key -> fields/tags/type, resolving
nested record field tags) and protocol-methods (method var -> [proto method])
registries at deftype/defprotocol load time; jolt.host accessors materialize
them.
- passes/types.clj: wp-infer! runs a closed-world fixpoint joining call-site
arg types into callee params; reinfer-def re-seeds each def at emit. Self-
recursive calls and fn-level recur are collected so a recursive fn's params
are constrained by its recursion, not just external callers — else a param
the recursion widens (e.g. binary-trees check-tree, whose untagged child can
be nil) would be unsoundly typed non-nil. A fn used in value position keeps
:any params (callers unknown). Megamorphic sites join to :any.
- build.ss: analyze all app forms and run the fixpoint before per-form emit.
- run-wp.ss: gate (cross-fn propagation, escape soundness, self-recursion).
make test / shakesmoke green, 0 new divergences, selfhost holds.
Co-authored-by: Yogthos <yogthos@gmail.com>
A loop test like (or (>= i cap) (> ... 4.0)) desugars to
(let* [g (>= i cap)] (if (truthy? g) g (> ... 4.0))) and the whole thing was
wrapped in jolt-truthy? because returns-scheme-bool? only looked at :const and
:invoke nodes, not the let*/if an or/and expands to. The wrapper defeats Chez's
branch inlining on the hot loop edge.
Make returns-scheme-bool? recursive over :if (both branches bool), :let (body
bool, tracking which bound locals hold a Scheme boolean), and :local (in that
set). or/and over bool-returning ops then read as Scheme booleans and the outer
wrapper drops. Still sound: eliding only when the value is provably #t/#f — a
jolt-nil is a truthy record in Chez, so a false positive would be a real bug, and
the recursion only proves bool-ness through ops already known to return one.
No bench regression; the win lands on hinted float loops where the branch, not
boxed arithmetic, is the cost.
Co-authored-by: Yogthos <yogthos@gmail.com>
defprotocol emitted one variadic (fn [this & rest] (protocol-dispatch P m this
(list->cseq rest))) per method, so every protocol call — even a no-extra-arg one
like (area s) — consed a rest list, wrapped it in a cseq, var-deref'd
protocol-dispatch, and jolt-invoke'd it (consing again). On mono-dispatch that was
2.07GB of allocation, ~65% of the benchmark.
Emit one fixed-arity clause per declared arglist instead. The 1/2/3-param arities
call positional protocol-dispatch{1,2,3}, which resolve the impl (by record tag,
reify method, or host-tag extension — factored into protocol-resolve) and apply it
directly; no rest-list, no seq round-trip. The dispatchN entry points are in the
native-op table so the shim calls bind straight to the records.ss procedures
rather than var-deref. 4+ params fall back to the variadic protocol-dispatch.
mono-dispatch 1.5s/2.07GB -> 0.69s/280MB; dispatch 26x -> 12.2x, mono-dispatch
111x -> 51x vs JVM. 5 new corpus rows pin multi-arity methods, host-type args,
and protocol-method-as-value against JVM Clojure.
Co-authored-by: Yogthos <yogthos@gmail.com>
Records were a jrec holding an alist of (kw . val) conses: ~113B/node, built
fresh per construction, field reads a list scan. Replace that with a shared
per-type descriptor (tag + field keywords + an eq?-keyed keyword->index table)
plus a flat per-instance value vector and an extension map for any non-field
keys assoc'd on (jolt-nil when there are none). Construction now allocates one
vector instead of a cons chain and a field read is an index lookup. binary-trees
construction allocation drops 2.085GB -> 1.19GB.
That alone barely moved binary-trees wall-time: profiling showed the read loop,
not allocation, dominates, and the read loop's own allocation came from (nil? l)
lowering to (jolt-invoke (var-deref "clojure.core" "nil?") l), which conses its
args every call. Add nil?/some? to the backend native-op table so they inline to
jolt-nil?/jolt-some? (and drop the truthy wrapper, like the other predicates).
check-tree's read loop goes from 1.476GB allocated to zero; binary-trees 18.9x
-> 9.7x vs JVM. The remaining gap is the field-read dispatch chain (jolt-c3mw).
Two JVM divergences fixed along the way, both certified:
- dissoc of a declared field downgrades a record to a plain map (was kept as a
record); an extension key still drops cleanly.
- map->R keeps extension keys (was dropping anything outside the declared basis).
16 new corpus rows pin assoc/dissoc/count/keys/seq/=/hash/extension-field
behavior against JVM Clojure.
Co-authored-by: Yogthos <yogthos@gmail.com>
* Make the benchmark harness build optimized binaries on Chez
bench/run.sh was Janet-era: it invoked a 'jolt' binary and set
JOLT_DIRECT_LINK/JOLT_WHOLE_PROGRAM, none of which exist on Chez, where
'joltc run -m' runs fully unoptimized (direct-link and inline default off). So
the suite was measuring jolt's unoptimized path.
run.sh now compiles each benchmark to an optimized AOT binary (joltc build
--direct-link --opt) and times it against JVM Clojure on the same portable
source, auto-detecting the Chez kernel dev files like build-smoke.sh. Adds
bench/deps.edn so joltc resolves the namespaces, NO_JVM to skip the reference.
mandelbrot.clj dropped its jolt.png require so the JVM reference can run it; the
picture demo moved to mandelbrot_png.clj (jolt-only). README scorecard refreshed
with current Chez numbers and the two-regime read (compute ~8-10x substrate floor;
dispatch/alloc ~120-330x architectural gaps the passes don't touch). Stale
'jolt -m' header lines point at bench/run.sh.
* Emit direct self-calls for named-fn self-recursion
A self-recursive call to a named fn compiled to (jolt-invoke fib ...) instead of
a direct (fib ...): emit-invoke handled a :local callee only when it was NOT a
known proc, so a :local that IS in *known-procs* (the letrec-bound self-name) fell
through to the :else jolt-invoke branch. Now a :local known proc emits a direct
Scheme call — no jolt-invoke, no per-call arg-list consing; case-lambda handles
arity.
fib 30: 63.3ms -> 4.7ms (faster than JVM Clojure's 7.1ms; was 9x slower). The win
is on every self-recursive non-loop fn, including the compiler's own. No semantic
change — selfhost holds, make test green, shakesmoke/buildsmoke byte-identical.
Re-mint (backend is seed). Corpus rows pin self-recursion across fixed/multi/
variadic arities.
* Intern no-ns keywords without per-call allocation
(keyword #f name) built a fresh combined-key string (string-append) on every
call just to do the intern-table lookup — ~80 bytes of garbage per (:kw x), map
literal, keyword arg, etc. A no-ns keyword now interns in a table keyed by the
name string directly, so a lookup of an already-interned keyword is one
hashtable-ref with no allocation. The ns table keeps the combined key; both share
the keyword-t khash (equal-hash of the combined key) so hash values are unchanged.
Small time win on its own (the field-read dispatch dominates hot record code —
see jolt-unx4) but removes per-call keyword allocation everywhere. Runtime .ss,
no re-mint; identity/=/hash unchanged, make test green.
* Fast record field reads: single eq? scan, skip the get-arm walk
(:field rec) / (get rec :field) lowers to (jolt-get rec kw), which walked the
get-arm list to reach the jrec arm, then did jrec-has? + jrec-lookup — TWO linear
scans, each comparing keys through the generic jolt=2 equality dispatcher. Field
keys are interned keywords, so:
- jrec-key=? compares a keyword query by eq? (jolt=2 only for non-keyword keys),
- jrec-ref does ONE scan (vs has?+lookup) and runs a deftype's ILookup valAt only
when the field is genuinely absent (present-nil still returns nil, not default),
- jolt-get-dispatch checks jrec? first, skipping the get-arm walk for the hottest
get target. jrec-lookup/jrec-has? (used by =, contains?, etc.) get the fast
compare too.
binary-trees 135x->18.9x, dispatch 121x->26.4x, mono-dispatch 327x->108x vs JVM.
Runtime .ss (collections.ss + records.ss), no re-mint; make test + shakesmoke +
buildsmoke green, record get/assoc/keys/=/count semantics unchanged.
---------
Co-authored-by: Yogthos <yogthos@gmail.com>
A type-aware audit (~190 collection expressions vs reference Clojure) found four
divergences the corpus missed — value-equality (= [0 1] '(0 1)) hides type and
laziness differences. Fixed, with type-predicate + over-infinite corpus rows that
pin them.
- partition-all [n coll] built vector chunks; JVM chunks are seqs. (The [n step
coll] arity was already correct, as is the partition-all transducer, whose
chunks are vectors in JVM too.) Now builds seq chunks.
- replace always returned a vector (mapv) and was eager; JVM is type-preserving —
a vector maps to a vector, any other seqable to a lazy seq.
- sequence eagerly realized its source (into-xform), so (first (sequence (map inc)
(range))) hung. Rewrote as a transformer iterator: pull one input at a time,
buffer the step outputs, emit lazily, run the completion to flush a stateful
xform. eduction builds on it (lazy, no longer an eager vector).
- mapcat and (apply concat coll-of-colls) hung over an infinite source because
jolt-apply seq->lists the trailing arg and mapcat seq->lists the map result.
Added lazy-concat-seq (lazily flatten a seq of colls); mapcat uses it directly,
and apply special-cases concat (its result is lazy) to route through it.
Docs: a cross-cutting return-type + laziness contract in docs/spec/09-core-library;
SPEC.md notes that = masks type/laziness so they need predicate / over-infinite
rows. EBNF is reader syntax only — unaffected.
Seed change (partition-all/replace/eduction are clojure.core overlay) -> re-mint;
selfhost holds. make test + shakesmoke + buildsmoke green, 0 new divergences.
Co-authored-by: Yogthos <yogthos@gmail.com>
* Reader records source line/column on list forms
The reader stamps 1-based :line/:column metadata on every list form (plus
:file when load-jolt-file is reading a file), and jolt.host/form-position
reads it back so the analyzer's :pos scaffold finally gets real data. A
left-to-right cursor counts newlines over the delta between successive forms,
so it stays O(n). Vector/map/set literals are untouched (their metadata is a
runtime value the analyzer would have to wrap in with-meta); empty () can't
carry meta. ^meta now merges onto the position keys instead of clobbering them.
Re-mint is byte-identical (the backend doesn't emit :pos), so this is a pure
scaffold for the error-location work that follows.
* Report source location on uncaught errors
Each top-level form records its source position (thread-local) before it
compiles+evals, and cli.ss jolt-report-uncaught appends 'at file:line:col'
when an error propagates out. Covers joltc -e, joltc run <file>, and
load-string — every interpreted path. Top-level granularity, one set per
form; deeper frames come from the Phase 2 frame walk.
Runtime .ss only, no re-mint.
* Clojure stack traces via source registry + native frame walk
A direct-link build emits (jolt-register-source! short-name ns name file line)
once per fn def — at definition time, so zero per-call cost. On an uncaught
error the reporter walks Chez's native continuation frames (jolt-throw captures
the live continuation via call/cc; host conditions carry their own
&continuation), maps each frame's procedure name through the registry, and
prints a Clojure backtrace 'ns/name (file:line)'. Wired into both the cli and a
built binary's launcher.
Frames are keyed by the short munged fn name Chez actually reports (emit-fn's
letrec self-binding), not jv$ns$name; a cross-namespace collision degrades to
the bare frame name rather than a wrong attribution. The analyzer carries the
original form's position through defn macroexpansion onto the def node.
Calling a non-fn now throws a catchable ClassCastException (via jolt-throw)
naming the operator, instead of a raw Chez error.
Caveats (documented in source-registry.ss): names map only in direct-link/AOT
closed-world builds — the open-world -e/repl/run path falls back to the
top-level location; and pervasive TCO erases tail-call frames, so a mapped
trace shows only the non-tail spine. JOLT_DEBUG_FRAMES dumps raw frame names.
Re-mint (analyzer + backend); prelude byte-identical (direct-link off during
mint). Corpus rows certified, build-smoke asserts the trace.
* Propagate source position through macroexpansion
hc-expand-1 now carries the macro call form's :line/:column onto the top of a
list expansion that has none of its own (merged under any meta the macro set),
so errors and stack traces in macro-generated code point at the call site —
Clojure parity. The analyze recursion re-expands inner macros, so each level's
top form picks it up, matching the reference compiler. (meta (macroexpand-1
'(when x y))) now reports the call-site line.
A direct-link fn defined through a user macro (build-app's defguarded) registers
with a real line, so build-smoke's trace assertion covers macro-defined fns.
Runtime .ss (host-contract.ss) — no re-mint; selfhost holds.
Phase 3's optional items are deferred: :line-in-ex-data has no clean consumer
(it would pollute ex-data, break = and printing, and positions already surface
via the trace + top-level location), and Chez source-object emission is a large
backend change the jv$-name registry already sidesteps.
* Review fixes: registration key, thread-locals, debug flag timing
- Register a fn under the name Chez actually reports for its frame, not the def
name: a named fn literal whose name differs from the def (def foo (fn bar …))
is framed as 'bar', and an anonymous fn def (def foo (fn …)) as jv$ns$foo.
Both previously registered under the def name and so never appeared in traces.
- rdr-source-file / rdr-pos-cursor are thread parameters, so concurrent compiles
(futures, core.async) don't clobber each other's file/line attribution.
- Read JOLT_DEBUG_FRAMES at call time: a built binary evaluates top-level forms
at heap-build time, where a load-time getenv is always unset.
Re-mint (backend + reader); prelude byte-identical, selfhost holds.
---------
Co-authored-by: Yogthos <yogthos@gmail.com>
Review found (< 1M 2M) worked but (min 1M 2M) threw — incoherent. Wire min/max
the same way as the other ops: value-position jolt-min/jolt-max shims (new in
seq.ss, added to core-value-procs) and call-position via bd-spec/bd-ops ->
jbd-min/jbd-max.
min/max return the original operand by value, not a coerced copy, matching
Clojure: (min 1M 2.0) -> 1M, (max 1M 2.0) -> 2.0, (min 1.50M 2M) -> 1.50M; a tie
keeps the second operand ((max 1.5M 1.50M) -> 1.50M). bigdec mixed with a flonum
in call position stays in the documented :any/contagion gap (value position
handles it). Re-mint; 6 more JVM-certified rows.
A direct (+ 1.5M 2.5M) emits a raw Chez + that rejects the bigdec record. Rather
than guard every arithmetic call site (measured 2-4x on unhinted fixnum loops),
let the analyzer dispatch where it can prove the type.
jolt.passes.numeric seeds a :bigdec kind from the M-literal and flows it through
let/loop/if like the existing :double/:long kinds; an arithmetic/comparison invoke
whose operands are all bigdec (integer literals allowed) gets :num-kind :bigdec.
The back end (bd-ops + emit-numeric) lowers those to the bigdec.ss engine
(jbd-add/-sub/-mul/-div, jbd-lt?/…, jbd-zero?/-pos?/-neg?, jbd-quot/-rem).
Zero cost on non-bigdec code: with no bigdec literals present the kind never
arises, so emission is byte-identical — the re-mint leaves prelude.ss unchanged,
only image.ss (the compiler) moves. Gaps (filed): a bigdec mixed with a flonum in
call position, and a bigdec the analyzer types :any, still hit the raw op and
throw; use value position or a literal-typed let.
Re-mint (numeric/backend are seed sources). 16 JVM-certified corpus rows.
A post-conformance review (chiasmus) flagged fresh-sym defined byte-identically
in 00-syntax and 30-macros; 00-syntax loads first, so the second is redundant.
Also note why deftype uses group-by-head while extend-protocol uses
parse-extend-impls (the latter must treat a computed class type in head position).
No behavior change.
Conformance gaps surfaced re-running the library suites:
- defn now keeps a leading docstring as :doc metadata — it was dropped, so
(:doc (meta #'f)) was always nil. Rides the def docstring slot.
- assert (and :pre/:post) throw a real AssertionError instead of an ex-info, so
(catch AssertionError …) / (thrown? AssertionError …) match, with Clojure's
"Assert failed: <msg>\n<form>" message.
- instance? clojure.lang.Seqable was conflated with ISeq, so a vector/map read
as not-Seqable. Split them: Seqable covers every persistent collection, ISeq
only seqs.
Running cognitect aws-api's pure test namespaces (signing/shapes/protocols/
util/retry/endpoints) surfaced general gaps:
- extend-protocol/extend-type accept a computed class type, e.g.
(Class/forName "[B") for the byte-array class — the byte-array idiom data.json
and aws-api use. The macro grouping handled only symbol/nil heads (it crashed on
a list type); type->name resolves a Class value via .getName; a byte-array
dispatches on the "[B" host tag.
- java.nio.ByteBuffer over a jolt byte-array (wrap/allocate/get/put/array/
remaining/position/limit/duplicate/flip), plus extend-protocol to it.
- java.util.Arrays (equals/copyOf/copyOfRange/fill) and java.util.Random
(nextBytes/nextInt/…).
- java.net.URI/create and clojure.lang.RT/baseLoader statics.
- clojure.core.async/promise-chan (deliver-once, peek-don't-pop).
- a failed java.time parse throws DateTimeParseException (typed), so
(catch DateTimeParseException …) matches it instead of leaking an untyped
condition.
The XML side lives in the jolt-lang/xml library (libxml2 over jolt.ffi); ByteBuffer
stays in core as a generic java.nio primitive.
Gate: make test green (corpus +6 JVM-certified rows, 0 NEW divergence; unit
553/553; SCI 211).
Shaking out clojure.core.memoize (207 assertions, 0 fail) cleared several
general gaps:
- deref/@ on a deftype or reify implementing clojure.lang.IDeref dispatches to
its deref method (RetryingDelay / make-derefable).
- deftype mutable fields (^:unsynchronized-mutable / ^:volatile-mutable) are
read live: a set! within a method is observed by a later read in the same
invocation, not the entry-time capture. Needed for double-checked locking.
Immutable fields stay let-bound. Field reads rewrite to (.-field inst) with
lexical-shadow tracking.
- def metadata values are evaluated, like Clojure: ^{:k (f)} stores (f)'s
result and ^{:af some-fn} the fn. :tag stays a literal hint.
- try dispatches catch clauses by class in order via the exception supertype
hierarchy; a non-matching value re-throws, an untyped host condition is caught
by a RuntimeException/Exception/Throwable clause. Previously the last clause
won and the class was ignored.
- locking takes a real per-object monitor (recursive Chez mutex) now that
futures/agents/threads share one heap; it was a no-op.
- supers/ancestors reflect a small modeled JVM interface hierarchy, so
(ancestors (class f)) yields Runnable/Callable (core.memoize's arg check).
- AssertionError / Error constructors.
JOLT_FEATURES is gone from the docs: it isn't read anywhere on Chez, and the
reader already includes :clj in its default feature set. RFC 0002's
{:jolt :default} design was reverted in the reader; docs now match the code.
Raises the SCI floor 205 -> 210.
Further clojure.core.cache fixes (198 -> 257 of its assertions):
- delay: a throwing body re-ran on every force and never became realized?. Run it
once like Clojure's Delay — cache the exception, mark realized, re-throw the same
on each deref. Fixes value-fn memoization / cache-stampede protection.
- deftype/defrecord: a method name appearing in two protocols with different
arities (data.priority-map's seq is in IPersistentMap [this] AND Sorted
[this asc]) registered per-protocol and shadowed; merge clauses by name across
all protocols into one multi-arity fn.
- empty?/peek/pop (IPersistentStack) dispatch through a deftype's methods; (= a-
deftype other) uses its equiv method (so caches compare to their backing map);
seq handles a host iterator (iterator-seq over .iterator).
- pop of an empty PersistentQueue returns it, like the JVM (was an error).
JVM-certified corpus rows. make test + shakesmoke green.
General fixes shaken out running clojure.core.cache (66 -> 198 of its assertions):
- Map destructuring applied an :or default only for :keys/:strs/:syms, not a
direct {x :x} binding — so {x :x :or {x 9}} (and the & {…} kwargs form) ignored
the default. Apply it for the direct binding too.
- fn didn't implement :pre/:post: a leading conditions map was evaluated as a body
literal (so % was unbound and (.q %) blew up). Recognize it and assert pre
before the body, bind % to the result, assert post, return %.
- (.q inst) on a deftype field with no matching method reads the field, like the
JVM (was "No method q").
- A deftype implementing the clojure.lang collection interfaces now dispatches
dissoc (without), contains? (containsKey), peek/pop (IPersistentStack), and
keys/vals (via its Seqable seq) through its methods — they were field-only, so
core.cache's caches and data.priority-map didn't behave as maps.
JVM-certified corpus rows for each. make test + shakesmoke green.
Finishes core.match — its full test suite (115/115) now passes, including the
two patterns the earlier work left out:
- Regex-literal patterns. A #"…" now reads as a regex VALUE (Clojure parity: the
reader constructs the Pattern, so a macro receives a regex, not jolt's tagged
form), and the analyzer compiles a regex value to the same :regex IR leaf via
its source. emit-quoted handles a quoted regex; a regex value carries the
java.util.regex.Pattern host tag so extend-protocol/instance? dispatch on it.
- Primitive-array patterns. A ^Type hint's :tag is now the SYMBOL (e.g. `ints`),
matching the JVM, so core.match's array-tag lookup engages the array
specialization (alength/aget). jolt's :tag consumers already tolerate a symbol
(hc-cell-num-ret normalizes; tag->nkind/def-meta handle both).
Also: a library-conformance directive in CLAUDE.md, and the supported-libraries
list (docs + site) simplified to one-line entries — a listed library is assumed
to work fully, so no tallies or feature enumerations. core.match + transit-jolt
added to the list.
Seed change (reader/backend/30-macros) -> re-minted; the rest runtime. JVM-
certified corpus rows; the stale `symbol hint -> :tag` divergence is dropped from
the allowlist (jolt now matches the JVM). make test + shakesmoke green.
Running clojure.core.match (a macro-heavy library that builds its compiler out
of deftypes implementing clojure.lang interfaces) shook out a cluster of general
gaps. Its own suite goes from not-loading to 111/115 assertions.
- deftype/defrecord implementing a clojure.lang collection interface now drives
the core fns: Indexed -> nth, Counted -> count, Associative -> assoc, ILookup
-> get/valAt (non-field keys only, so a method's own field bindings don't
recurse), ISeq -> seq/first/rest, IPersistentCollection -> conj, IFn -> the
value is callable. A jrec is still a map of fields by default; the interface
method wins when declared.
- Multi-arity inline methods are grouped into one fn (a type with (nth [_ i]) and
(nth [_ i x]) kept only the last before). Built as data, not a nested
syntax-quote, so a `(= ~ocr ~l) method body keeps its unquotes.
- instance?/satisfies? recognize a protocol a type implements, including a MARKER
protocol with no methods (core.match's IPseudoPattern) — deftype/defrecord now
record protocol satisfaction even with zero methods. Added ILookup/Indexed/
Counted to the instance? taxonomy for the built-in collections.
- Syntax-quote: a fully-qualified class name (clojure.lang.ILookup) stays bare
instead of being namespace-qualified; (unquote x) is detected in a lazy seq
(a macro that builds its template with map, e.g. deftype's rewrite-set).
- clojure.set union/intersection/difference are variadic (& sets) + union 0-arity.
- java map view methods: keySet/values/entrySet/size/isEmpty.
- deprecated java.util.Date getters (getYear/getMonth/...) + the multi-arg
(Date. year-1900 month0 date hrs min) constructor.
Seed change (deftype/defrecord macros + clojure.set) -> re-minted; the rest are
runtime. 11 JVM-certified corpus rows; make test + shakesmoke green.
Four general gaps, shaken out by loading clojure.spec.alpha:
- Special forms were shadowable by a same-named macro. analyze-list
macroexpanded before checking special forms, so a ns that redefs def/and/or
(spec excludes them via :refer-clojure :exclude) made a bare def resolve to
the macro instead of the special form, breaking every defn after. Now a head
in the special-form set is never macroexpanded, matching the reference
macroexpand1 isSpecial check.
- reify dropped all but the last arity of a multi-arity protocol method (spec
reifies (specize* [s]) and (specize* [s _])). The macro keyed methods by name
and overwrote; now it groups arities into one multi-arity fn.
- reify instances did not implement IObj: with-meta threw and (instance?
clojure.lang.IObj r) was false. Every Clojure reify carries metadata. with-meta
now copies the reify to a fresh identity (shared method table) and keys its
meta; instance? IObj/IMeta is true for any reify. This was the registry bug —
spec's with-name returned nil for specs, so get-spec missed.
- (set! (. Class field) val) was rejected. spec toggles
clojure.lang.RT/checkSpecAsserts this way; the analyzer now lowers it to a
jolt.host/set-static-field! call over a mutable-statics table, and a plain
Class/field read consults that table.
Also: .name/.getName on a Namespace and .ns/.sym on a Var (spec's ns-qualify /
->sym). analyzer + reify are seed sources (re-minted). spec.alpha now does
valid?/conform/cat/keys/explain-str/check-asserts. tick.alpha.interval-test still
needs time-literals data readers (separate).
ZoneOffset/ZoneId (SHORT_IDS, fixed-offset + UTC + system; named zones via a
fixed-offset table), ZonedDateTime/OffsetDateTime/OffsetTime, Clock (fixed/
system, with now [clock] arity), and DateTimeFormatter integration (ofPattern
+ ISO_* constants, .format/.parse over the rich java.time values via the
inst-time.ss pattern engine). systemDefault resolves to UTC to keep the
#inst atZone/toInstant round-trip machine-tz-independent.
tick.core + tick.protocols + tick.locale-en-us load; tick's api_test runs
31 tests / 352 pass / 7 fail / 0 error. The 7 are host gaps: named-zone DST
(no tzdb), French locale month names (no locale DB), nanosecond Instant.
General fixes surfaced by tick: :ns/keys map destructuring ({:tick/keys [..]})
in 00-syntax.clj (re-minted), and extend-protocol to java.time classes
(records.ss host-type-set). 12 corpus rows certified vs JVM. make test +
shakesmoke green, selfhost holds, 0 new divergences, data.json stays 138/139.
Duration (ISO PT.. toString, between, full arithmetic), Period (between with
borrow, P.. toString, normalized), full Month/DayOfWeek enums (named constants,
print as their name — fixes the Phase-1 raw-jhost print), Year, YearMonth
(2020-02 toString, leap, atDay/atEndOfMonth), ChronoUnit (between/getDuration)
and ChronoField. The temporal machinery on the Phase-1 types now works with
ChronoUnit/ChronoField: (.plus t n DAYS), (.until t1 t2 unit), (.get/.getLong
t field), (.with t field v), (.isSupported ..), (.truncatedTo ..).
Analyzer: (. Class method args) with a class target lowers to a static call
(Class/method args) instead of mis-dispatching as an instance call on the arg
— matches JVM; needed by cljc.java-time.year. Seed re-minted; selfhost holds.
The Phase-2 cljc.java-time namespaces load; tick.core advances to a Phase-3
zone gap. 10 corpus rows certified vs JVM. make test + shakesmoke green, 0 new
divergences, data.json stays 138/139.
Replace the 33-line pprint shim with a column-aware pretty printer and a
Common Lisp cl-format engine, ported from the ClojureScript implementation
(no STM — atom-backed fields) and adapted to JVM-Clojure interop. Provides
pprint/write/write-out/with-pprint-dispatch/formatter-out/cl-format and
simple/code dispatch.
core print routes column-aware into an active pretty-writer via a __write
hook (suppressed inside with-out-str captures); PrintWriter host class
forwards into the wrapped writer. Re-mint: pprint is baked into the seed.
Unblocks clojure.data.json/pprint (its pretty-printing test passes).
Directives ~R/~P/~C/~F/~E/~G/~$/~(~) not ported (unused by the targets).
make test + shakesmoke green, 0 new divergences, selfhost holds.
A slash-free dotted symbol with a Capitalized final segment (java.util.Map,
clojure.lang.Named, java.time.Instant) now self-evaluates to its name string
instead of resolving to nil — jolt models a class as its name, so a library
can extend a protocol to, or instance?-check, a host class jolt has no shim
for. hc-resolve-global classifies these as :class; the analyzer emits a const.
extends? now matches when either the query or the registered tag is a dotted
suffix of the other, so (extends? P java.util.Collection) finds the impl
extend registered under the canonical short tag.
Add DateTimeFormatter/ISO_INSTANT (UTC, trailing Z).
These unblock loading clojure.data.json, which dispatches JSONWriter on
java.util.Map/Collection/CharSequence/Instant and defaults a formatter to
ISO_INSTANT.
read-string/read now return real sets for #{...} literals (top-level and
nested) instead of the reader's {:jolt/type :jolt/set} form — the data
seams convert set forms to sets (recursing, preserving metadata and source
map-key order); clojure.edn already did this. The compiler keeps reading
via the raw reader, so set literals in code stay forms the analyzer lowers.
format %x now emits lowercase hex (Chez number->string is uppercase); %X
unchanged.
extend and extends? handle a nil target type (host tag "nil"), matching
extend-type — protocols can be extended to nil via the function form, not
just the macro.
Found porting transit/data.json and shaking out aero.
conj/assoc/dissoc/disj/pop/into and empty now thread the receiver's
metadata onto the result, matching Clojure (each op constructs a new
collection with meta() carried forward; coll.empty() is
EMPTY.withMeta(meta())). The metadata side-table is now weak so meta on
intermediate collections is reclaimed with them, and empty-list-t carries
an (unused) field so a metadata-bearing () is a distinct identity from the
shared singleton instead of leaking meta onto every ().
Unblocks metadata-driven walks (aero/integrant): (into (empty form) ...)
now preserves a vector/map/set's metadata, so a postwalk whose outer fn
reads (meta x) sees it.
The reader lowered ^meta on a vector/map/set literal to a runtime
(with-meta form meta) list, so read-string/edn of data with metadata
returned the form and lost the metadata. Attach it to the value instead,
as Clojure does; the analyzer re-emits (with-meta coll meta) for a
meta-carrying collection literal in code, so a literal still carries its
metadata at runtime and ^Type/^long arglist hints (consumed by
analyze-arity directly) are unaffected.
Also: pr honors *print-meta*, and clojure.walk/clojure.edn re-attach
metadata to the collections they rebuild (matches Clojure; a
metadata-driven config lib like aero relies on it).
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.
types.clj held the inferencer, the success-type checker, and the driver in one
716-line namespace. Move the self-contained checker into jolt.passes.types.check:
the error-domain predicates (not-number?/not-seqable?/not-callable?), the op
tables, type-name, check-invoke, and the user-fn registry. These are pure over
inferred types and the run's env cells, with no inference, so a check-rule edit
can no longer perturb the inferencer.
The infer-coupled probes stay in types.clj — isolated-diag-count and
check-user-call re-run inference, so moving them would make check depend on the
inferencer and reintroduce the cycle. Verbatim move; new ns wired into
ei-compiler-ns-files; seed re-minted to the byte-fixpoint.
walk treated a record as a plain map (record? implies map?), rebuilding it via
(into (empty form) ...) which yields a bare map and drops the type. Add a record
branch before the map branch that conj-es the walked entries back onto the
original, matching JVM clojure.walk's IRecord case. Type-dispatched walks need it
— integrant resolves #ig/ref by detecting its Ref record while postwalking the
config, so without this every ref silently fails to resolve.
clojure.walk is baked into the prelude, so the seed is re-minted. Corpus gains
five JVM-certified rows for record type/instance? survival through pre/postwalk.
infer's :invoke case was ~120 lines of cond arms hand-coding eight call
patterns, all destructured positionally with (nth r 0)/(nth r 1) on the
[type node'] tuples infer returns. Split each pattern into a named helper
(infer-pred-fold/-kw-lookup/-get-lookup/-reduce-hof/-seq-hof/-conj-into/-call)
behind an infer-invoke dispatcher that keeps the cond guards verbatim, and add
ty/nd accessors for the tuple so a silent transposition can't hide.
The accessors are applied only to genuine infer results (the new helpers and
infer-fn-seeded); the :map/:let/:loop arms interleave non-infer pairs
(binding tuples, accumulator pairs) with infer results, so those keep nth.
Pure restructuring — the guards, order, and bodies are unchanged; seed
re-minted to the byte-fixpoint, gate green, 0 new corpus divergences.
The inliner and the type inferencer each recognized (:k m) and (get m :k)
lookups with their own copy of the callee tests — the get-callee check was
duplicated verbatim across both. Lift kw-callee?/get-callee? into
jolt.passes.fold (alongside scalar-const?) and call them from both passes so
the head recognition can't drift.
Only the head predicates move. The deliberate differences stay: the inliner
still accepts any scalar key in the get-form (its scalar-replacement targets
can be string/number-keyed maps) while the inferencer requires keyword keys
for struct field typing, and the inferencer keeps its two arms separate so each
rebuilds args for its form. The backend's value-as-fn ifn-kind is left alone.
Under --direct-link a top-level def binds jv$<fqn> and app->app calls bound directly
to it. emit-invoke raw-applied that binding for any var callee, but only a fn-valued
def is a Scheme procedure: (def cfg {...}) then (cfg :a) emitted (jv$cfg :a), applying
a pmap -> "attempt to apply non-procedure". Maps/sets/keywords are invokable in Clojure
via jolt-invoke, which the indirect path used, so this only bit closed-world builds.
Track which direct-linked vars hold fn literals (direct-link-fns, registered at the def
site when the init op is :fn) and only raw-apply those. A non-fn callee falls through to
the jolt-invoke branch, which still uses the direct jv$ binding as the invoke target —
so the var-deref is still skipped, just not the dispatch.
Seed source: re-minted. Regression in directlink-test.ss (jolt-cw1o).
A loop var with an integer-literal init now types :long (fx ops) when every recur
arg in its slot is an increment-style step — the var unchanged, inc/dec, or (+/-
var <int-literal>). So (loop [i 0] (recur (inc i))) gets fx1+/fx<? without a hint,
matching how Clojure treats a primitive-long loop counter.
Soundness: only increment steps qualify. A multiplicative or large-growth
accumulator like (recur (* acc 2)) is never seeded, so it stays generic and keeps
arbitrary precision — a bignum-producing loop (e.g. a factorial) is unaffected.
counter-step? gates this; the existing fixpoint demotes anything inconsistent.
test/chez/numeric-test.ss 44/44 (incl. a factorial loop staying bignum-exact while
its counter is fx); full make test green, 0 new corpus divergences.
jolt.passes.inline was fully written but dormant — it fetched bodies via the
inline-ir host hook, which was a stub returning nil. Wire it up: run-passes stashes
each inline-eligible defn (single fixed arity) as its form is optimized, and
inline-ir hands the body back at call sites under --opt.
The catch was the ^double/^long coercion: an inlined fn drops its param-entry and
return coercion, so (work 3 4) on a ^double fn would return 25 instead of 25.0. New
:coerce IR node carries the coercion inside the spliced body — the inline pass wraps
a hinted param's arg and the return in :coerce, the back end lowers it
(exact->inexact / jolt->fx), and jolt.passes.numeric reads its :kind. So an inlined
call matches the called one and the body's fl*/fx* fast path still fires.
Only under --opt (closed world); the seed mint and -e don't inline, so selfhost and
the corpus are unaffected. test/chez/inline-test.ss 12/12 (make inline); full make
test green, 0 new corpus divergences.
Bench (hot loop, body is a ^double helper call): direct-link 500ms -> --opt
(inlined) 184ms = 2.7x, by eliminating the call + coercion wrappers and letting Chez
fuse the fl-ops unboxed. ~26x over the default dispatched build.
A ^double/^long return hint on a fn's name now (a) coerces the fn's value on the
way out — exact->inexact / jolt->fx, like a JVM primitive return — and (b) types a
call to it, so an accumulator over the result specializes:
(defn ^double work [^double x ^double y] (+ (* x x) (* y y)))
(loop [acc 0.0] (recur (+ acc (work a b)))) ; (+ acc (work ..)) -> fl+
The analyzer pushes the name's numeric tag onto each arity (:ret-nhint) for the
back-end coercion, and resolve-global surfaces the callee's declared return
(:num-ret, read from var meta) onto the :var node so jolt.passes.numeric types the
call. defn carries the name hint through.
This unblocks the accumulator-over-fn-result pattern that round 2 had to demote.
The win is bounded by call overhead in an open/dispatched build (~1.15x on a hot
loop whose body is a helper call); it compounds with direct-linking and, later,
inlining. A numeric return hint is a contract, like ^long — redefining the var to
return another type in an open build breaks it.
Not yet: per-arity arglist return hints, (defn f (^double [x] ..)). Gate:
test/chez/numeric-test.ss 39/39; full make test green, 0 new corpus divergences.
loop-kinds only typed :double accumulators; a ^long-seeded loop var (e.g.
(loop [acc start] ...) with a ^long start) stayed generic even though it's sound
to fx-type — :long only ever comes from an explicit hint, and a ^long value is
already coerced to a fixnum at fn entry. Keep the init's kind (:double or :long)
through the fixpoint, demoting only on a recur-arg mismatch.
Integer-literal-init loop vars (a bare (loop [i 0] ...)) still stay generic by
design: :long is never seeded from a literal, so a bignum-producing loop keeps
arbitrary precision.
A loop binding whose init is double and whose every recur arg stays double (a
bounded monotone fixpoint) is typed :double, so its arithmetic — and the recur
args feeding it — emit fl-ops. Chez can then keep the accumulator unboxed in a
float register across the loop.
Integer loop vars stay untyped: a bare integer init never seeds :long (same rule
as round 1), so a bignum-producing loop keeps arbitrary precision rather than
overflowing a fixnum. recur-kinds walks only tail position (if/do-ret/let-body),
stopping at nested loop/fn so a loop sees only its own recur.
A/B on a loop-carried double accumulator: 735ms generic -> 500ms typed (1.47x),
closing the gap to the JVM from ~3.3x to ~2.2x. The integer counter stays generic,
which is most of the residual.
A ^double/^long param hint (or a float literal) now drives Chez flonum/fixnum
ops instead of generic arithmetic — JVM-style primitive hints, available in every
build and at -e (not gated on direct-linking or whole-program inference).
New pass jolt.passes.numeric: a local forward type-flow seeded from ^double/^long
fn-param hints (analyzer attaches :nhints per arity) and float literals,
propagated through let inits / arithmetic / if / do. It tags an arithmetic invoke
:num-kind :double|:long when every operand is that kind (an integer literal is a
wildcard, coerced to a flonum in a double op). The back end lowers a tagged node
to fl+/fl-/fl*/fl//fl<?/... or fx+/fx*/fx1+/fxquotient/... (unchecked-add etc.
join the fixnum path; == too). Runs last in run-passes, both branches.
Soundness: :long is seeded ONLY from an explicit ^long hint, never a bare integer
literal, so un-hinted integer code keeps jolt's arbitrary-precision numbers — no
fixnum-overflow surprise, no corpus divergence. :double comes from ^double hints
and float literals (flonum arithmetic is always flonum, matching the generic
result). A ^long hint is a promise the value is a fixnum: fx+ raises on overflow,
like a JVM fixed-width long.
Numeric-hinted params coerce at fn entry (exact->inexact / jolt->fx), the way the
JVM coerces a primitive parameter — so the body's fl*/fx* ops can rely on the
type even when a caller passes an exact int (e.g. Chez's (* 0 1.0) => exact 0).
Round 1 specializes hinted straight-line / fn-body arithmetic. fl-ops are ~4x
generic in a tight Chez loop, but realizing that on loop-carried accumulators
needs loop-var typing — round 2. Sound foundation, gated by test/chez/numeric-test.ss.
A release/optimized `jolt build` is a closed world: every app def is final, so
an app->app call can bind to the def's Scheme binding directly instead of going
through (jolt-invoke (var-deref ns name)).
The emitter gains a direct-link mode (off for the seed mint, runtime -e/repl, and
dev builds). With it on, a top-level app def also emits a binding jv$<ns>$<name>
that def-var! aliases; an app->app call or value-ref to a name already emitted in
the unit lowers to that binding, skipping both the var-table lookup and the
generic IFn dispatch. ^:dynamic/^:redef defs and nested defs (a defonce's inner
def) opt out and stay indirect. Off direct-link mode, emit-top-form is exactly
emit, so the seed and runtime eval are byte-unchanged (selfhost holds).
build.ss turns it on for release + optimized; the defined-set accumulates across
the dependency-ordered namespaces so a dep's defs are linkable by the time the
entry that calls them is emitted. App->core calls stay indirect for now (core is
the baked seed); that's a later stage.
~1.74x on a hot cross-namespace call loop (26.5s -> 15.2s).
jolt could call C (foreign-fn -> foreign-procedure) but C could not call back
into jolt, which GTK signals (and any callback-taking C API) require. Add the
inverse: jolt.ffi/foreign-callable wraps a jolt fn as a C-callable function
pointer, mirroring the foreign-fn pipeline.
A new jolt.ffi/__ccallable special form carries the fn as a child expression
(analyzed + walked by the passes; ir.clj gains an :ffi-callable arm in both
child walks) plus literal arg/ret type keywords. The back end lowers it to a
locked Chez foreign-callable and returns its entry-point address as a jolt
pointer; host/chez/ffi.ss registers the code object so the collector keeps it,
and free-callable unlocks it. :collect-safe emits the convention that
reactivates the thread on entry, for callbacks fired while it is parked in a
:blocking call (a GTK main loop).
Test: ffi-binding-test.ss sorts an int array through libc qsort with a jolt
comparator (C -> jolt -> C). Re-minted seed.
types.clj drove inference through ~14 module-level atoms; the infer walk was
non-reentrant and depended on hidden set-*! install order. Thread one immutable
env (mk-env) through infer instead: it snapshots the installed config
(rtenv/vtypes/record-shapes/protocol-methods/map-shapes?) and carries the
per-run flags and accumulator/guard cells (diags/calls/checking-set/diag-memo).
A fresh env per run makes the pass re-entrant — isolated-diag-count's probe now
runs under a sub-env with its own diags cell instead of save/restoring a shared
atom.
Only state whose lifecycle spans separate API calls stays module-level: a
config-box the set-*! API writes, the escapes/user-sig sweep registries, and a
bridge holding the last checking run's diags for take-diags!. record-type-from-
entry/field-type-from-tag now take the shapes map directly rather than reading a
global.
jolt-ogib.10. Behavior pinned by the new infer gate (23 cases) plus selfhost +
buildsmoke. Re-minted seed.
The lattice-split commit staged its seed before make remint ran, so image.ss
lagged the source. Commit the correct re-minted image (gensym renumbering only).
The 1123-line collection tier is the largest source file. Cut it at two existing
section banners into 20-coll (predicates, printing, hierarchies, pure-over-core
leaves), 21-coll (rand/sort seams, the test runner, fn combinators), and 22-coll
(canonical Clojure ports, transduce/into, JVM-shape stubs). No macros in this tier,
so order is the only constraint; the emit-image manifest lists the three in
sequence. Re-minted seed is identical apart from gensym label renumbering.
check-user-call rebuilt the all-:any env once per parameter (O(params^2)) and
re-inferred a callee body at every call site. Build the env once and memoize each
probe by [key i argtype] (and the baseline by [:base key]), cleared per form in
check-form. The global type-env is stable within a form's check and the probe's
calls/escapes side effects aren't read there, so a skipped repeat is observably
identical. (The inline-side re-walk the audit flagged is moot: hc-inline-ir is a
no-op on Chez, so try-inline never reaches body-size/body-closed?.)
- take-last / drop-last return seqs, not vectors: take-last wraps in seq; drop-last
is the JVM (map (fn [x _] x) coll (drop n coll)) form (lazy, () when empty).
- cycle is lazy ((lazy-seq (concat coll (cycle coll)))) so it no longer counts its
argument and terminates on a lazy/infinite input.
- fold's foldable-call catch uses :default, matching the rest of jolt-core and
also catching a raw host condition from a folding primitive.
- alts! rejects non-channel ports with a clear error (put specs / :default are
unsupported) instead of crashing inside ac-poll!.
- Misc: drop the unreachable second getCause clause; jolt-nth on a string raises
'nth "index out of bounds" like the vector branch; name the inline fixpoint cap;
bld-sh-capture rejoins lines with newlines; clarify a couple of comments.
map-ir-children single-sourced the child layout for rewrite passes; the read-only
analyses each re-enumerated ops by hand. Add a fold companion, reduce-ir-children,
and rebuild body-size, pure?, and body-closed? on it (each reduces to a leaf value
+ the special ops it actually needs). local-escapes? stays an explicit walk — its
default is conservatively true and it inspects node shape beyond child purity, so
folding an unhandled op over its children would be unsound for scalar replacement.
analyze-special inlined def (~35 lines) and set! while try/letfn/fn* were already
helpers. Pull both out and move field-head? above analyze-special so its set! arm
and analyze-list reach it without a forward reference — the file's "only analyze
is forward-declared" invariant holds again. Pure code motion.
