Chez inc 3m: numeric-edge literal emit + variadic assoc!

##Inf/##-Inf/##NaN were emitted to bare inf/-inf/nan, which are unbound symbols in
Chez. emit-const now lowers them to +inf.0/-inf.0/+nan.0. The -e/element printer
renders them inf/-inf/nan (Chez's number->string gives +inf.0), and str renders the
long Clojure forms Infinity/-Infinity/NaN. assoc! is now variadic ((assoc! t k v
& kvs)) like Clojure.

Prelude parity 1382 -> 1407/2497, 0 new divergences. str of inf INSIDE a collection
still wants the long form (needs the Phase-2 recursive str renderer), so
[inf inside coll] is allowlisted. Transducer arities and the cdr-on-()/\p{} regex
gaps are split out to jolt-kxsr/jolt-y1zq.

host/chez/converters.ss

@@ -13,6 +13,11 @@
     ((string? v) v)
     ((char? v) (string v))
     ((regex-t? v) (regex-t-source v))
+    ;; str/print render the infinities and NaN long-form (Clojure .toString),
+    ;; unlike the -e printer's inf/-inf/nan.
+    ((and (flonum? v) (fl= v +inf.0)) "Infinity")
+    ((and (flonum? v) (fl= v -inf.0)) "-Infinity")
+    ((and (flonum? v) (not (fl= v v))) "NaN")
     (else (jolt-pr-str v))))
 (define (jolt-str . xs)
   (let loop ((xs xs) (acc '()))

host/chez/emit.janet

@@ -122,10 +122,14 @@
     # jolt models every number as a double (no ratios/bignums; see reader.janet).
     # Emit flonums so arithmetic matches the Janet host and Chez doesn't fall into
     # exploding exact rationals (mandelbrot). Integer-valued -> append ".0".
-    (number? v) (let [s (string v)]
-                  (if (or (string/find "." s) (string/find "e" s) (string/find "n" s))
-                    s
-                    (string s ".0")))
+    # ##Inf/##-Inf/##NaN: Janet stringifies these as inf/-inf/nan, which are
+    # unbound symbols in Chez — emit Chez's flonum literals instead.
+    (number? v) (cond
+                  (= v math/inf) "+inf.0"
+                  (= v (- math/inf)) "-inf.0"
+                  (not= v v) "+nan.0"
+                  (let [s (string v)]
+                    (if (or (string/find "." s) (string/find "e" s)) s (string s ".0"))))
     (string? v) (string/format "%j" v)   # quoted+escaped string literal
     # keyword literal -> (keyword ns name); ns is everything before the first "/"
     (keyword? v) (let [s (string v) idx (string/find "/" s)]

host/chez/rt.ss

@@ -98,9 +98,15 @@
 ;; jolt models every number as a Clojure double: integer-valued values print
 ;; without a ".0" (the Janet host prints (* 1.0 5) as "5", (/ 1 2) as "0.5").
 (define (jolt-num->string x)
-  (if (and (rational? x) (integer? x))
-      (number->string (exact x))
-      (number->string x)))
+  (cond
+    ;; the -e / element printer renders the infinities and NaN as inf/-inf/nan
+    ;; (Chez's number->string gives +inf.0 etc.); the str/print family uses the
+    ;; long "Infinity"/"NaN" forms (see jolt-str-render-one in converters.ss).
+    ((and (flonum? x) (fl= x +inf.0)) "inf")
+    ((and (flonum? x) (fl= x -inf.0)) "-inf")
+    ((and (flonum? x) (not (fl= x x))) "nan")
+    ((and (rational? x) (integer? x)) (number->string (exact x)))
+    (else (number->string x))))
 
 ;; Program-final-value printer. jolt's `-e` prints in str-style: strings raw (no
 ;; quotes), chars as `\c`/`\newline`, collections recursively. NOTE: maps/sets

host/chez/transients.ss

@@ -27,9 +27,10 @@
   (jolt-trans-check t "conj!")
   (jolt-transient-coll-set! t (apply jolt-conj (jolt-transient-coll t) xs))
   t)
-(define (jolt-assoc! t k v)
+;; (assoc! t k v & kvs): variadic like Clojure (jolt-assoc already folds pairs).
+(define (jolt-assoc! t . kvs)
   (jolt-trans-check t "assoc!")
-  (jolt-transient-coll-set! t (jolt-assoc (jolt-transient-coll t) k v))
+  (jolt-transient-coll-set! t (apply jolt-assoc (jolt-transient-coll t) kvs))
   t)
 (define (jolt-dissoc! t . ks)
   (jolt-trans-check t "dissoc!")

test/chez/README.md

@@ -105,7 +105,8 @@ corpus case with all of core present, bucketing the result —
     JOLT_CORPUS_LIMIT=200 …    (every-Nth stride, fast)
 
 Parity baseline: inc 3j **1220/2497**; 3k (converters, jolt-t6cr) **1326**;
-3l (transients, jolt-kl2l) **1382/2497**, 0 NEW divergences (13 allowlisted:
+3l (transients, jolt-kl2l) **1382**; 3m (numeric-edge emit + variadic assoc!,
+jolt-q3w8) **1407/2497**, 0 NEW divergences (14 allowlisted:
 dynamic vars `*ns*`/`*clojure-version*`/`*unchecked-math*`, var/`*ns*` rendering,
 class names, eval-order, with-open — all deferred Phase-2 / dynamic-var gaps).
 - inc 3k `host/chez/converters.ss`: `str`/`subs`/`vec`/`keyword`/`symbol`/`compare`/
@@ -118,11 +119,17 @@ class names, eval-order, with-open — all deferred Phase-2 / dynamic-var gaps).
   are redefined to see THROUGH a transient (frequencies/group-by do `(get tm k)` on a
   transient map); `vector?` on a transient vector is false, which group-by relies on.
 
+- inc 3m: `##Inf`/`##-Inf`/`##NaN` emitted to bare `inf`/`nan` (unbound in Chez);
+  emit-const now lowers them to `+inf.0`/`-inf.0`/`+nan.0`, the `-e` printer renders
+  `inf`/`-inf`/`nan` and `str` renders `Infinity`/`-Infinity`/`NaN` (Clojure). Plus
+  variadic `assoc!`. (`str` of inf *inside a collection* still wants the long form —
+  the Phase-2 recursive str renderer — so `[inf inside coll]` is allowlisted.)
+
 The remaining buckets are the punch-list the next increments chase: ~360 emit-fail
 (genuine host interop — qualified Java/Janet refs, runtime `defmacro`/`eval`, out of
-the analyzer's subset) and ~740 runtime crashes, including `##Inf`/`##NaN` literals →
-unbound `inf`/`nan` and seq-prim transducer arities (inc 3m jolt-q3w8), multimethod
-dispatch (Phase 2 jolt-9ls5), and more host-coupled natives without a shim.
+the analyzer's subset) and ~715 runtime crashes — more host-coupled natives without a
+shim, transducer arities (jolt-kxsr), `cdr`-on-`()` and `\p{}` regex classes
+(jolt-y1zq), and multimethod dispatch (Phase 2 jolt-9ls5).
 
 Two host shims landed with the prelude. `host/chez/atoms.ss`: atom/deref/swap!/
 reset! (+ compare-and-set!/swap-vals!/reset-vals!) — host-coupled mutable cells the

test/chez/emit-test.janet

@@ -467,6 +467,27 @@
       (ok (string "jolt-chez -e: " src) (and (= code 0) (= out want))
           (string "chez=" out " janet=" want " | " err)))))
 
+# 3r) numeric-edge literals (jolt-q3w8): ##Inf/##-Inf/##NaN emitted to bare
+#   inf/nan (unbound on Chez) — fix emit-const to +inf.0/-inf.0/+nan.0, the
+#   -e printer to inf/-inf/nan, and str to Infinity/-Infinity/NaN (Clojure).
+#   Value/print cases are pure literals -> subset path (d/run-on-chez).
+(each src ["(< 5 ##Inf)" "(> 5 ##-Inf)" "(= ##Inf ##Inf)"
+           "##Inf" "##-Inf" "##NaN" "[##Inf]" "[##NaN ##-Inf]"]
+  (let [[code out err] (d/run-on-chez ctx src) want (cli-oracle src)]
+    (ok (string "numedge: " src) (and (= code 0) (= out want))
+        (string "chez=" out " janet=" want " | " err))))
+# str of inf/nan needs the prelude (str is a converter shim).
+(each src ["(str ##Inf)" "(str ##-Inf)" "(str ##NaN)"]
+  (let [[code out err] (run-prelude src) want (cli-oracle src)]
+    (ok (string "numedge: " src) (and (= code 0) (= out want))
+        (string "chez=" out " janet=" want " | " err))))
+# variadic assoc! (jolt-q3w8): (assoc! t k v & kvs).
+(each src ["(count (persistent! (assoc! (transient {}) :a 1 :b 2 :c 3)))"
+           "(get (persistent! (assoc! (transient {}) :a 1 :b 2)) :b)"]
+  (let [[code out err] (run-prelude src) want (cli-oracle src)]
+    (ok (string "numedge: " src) (and (= code 0) (= out want))
+        (string "chez=" out " janet=" want " | " err))))
+
 # 4) perf signal: emitted fib(30) in-Scheme timing (excludes Chez startup), to
 #    track against the spike ceiling (hand-Scheme fib ~5ms). Informational — the
 #    jolt-truthy? wrapper (~3x) and flonum modeling are known Phase-4 levers.

test/chez/run-corpus-prelude.janet

@@ -54,7 +54,12 @@
    "*ns* user" true
    "str of a var" true
    "*clojure-version* major" true
-   "*unchecked-math*" true})
+   "*unchecked-math*" true
+   # (str [##Inf]) wants "[Infinity]" but the Chez -e printer (jolt-pr-str, which
+   # str falls back to for collections) renders inf as "inf" — str needs a
+   # recursive long-form renderer, the Phase-2 canonical printer. Top-level
+   # (str ##Inf) -> "Infinity" already works (jolt-str-render-one).
+   "inf inside coll" true})
 
 (def ctx (d/make-ctx))
 
@@ -130,8 +135,8 @@
 # reach-floor and the suite baseline. The gate fails if parity drops below it, or
 # on any NEW (un-allowlisted) divergence — a real Chez correctness regression.
 # Full-corpus baseline: inc 3j 1220/2497; 3k (converters) 1326; 3l (transients)
-# 1382. Strided runs scale the floor down.
-(def base-floor (scan-number (or (os/getenv "JOLT_CHEZ_PRELUDE_FLOOR") "1382")))
+# 1382; 3m (numeric-edge emit + variadic assoc!) 1407. Strided runs scale down.
+(def base-floor (scan-number (or (os/getenv "JOLT_CHEZ_PRELUDE_FLOOR") "1407")))
 (def floor (if (os/getenv "JOLT_CORPUS_LIMIT") 0 base-floor))
 (when (or (> (length diverged) 0) (< pass floor))
   (printf "REGRESSION: pass %d < floor %d or %d new divergence(s)" pass floor (length diverged)))