53a189541c
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.
87 lines
3.8 KiB
Scheme
87 lines
3.8 KiB
Scheme
;; transients (jolt-kl2l) — copy-on-write over the persistent collections.
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;;
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;; A first cut: each transient op rebuilds the persistent collection (no in-place
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;; mutation perf), but the SEMANTICS match — the overlay's transient users (into,
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;; frequencies, group-by) get correct results. get/count/contains? are extended to
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;; see THROUGH a transient to its held collection (frequencies/group-by do
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;; (get tm k) on a transient map). vector? on a transient vector is false (it's a
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;; jolt-transient record, not a pvec), which group-by relies on. Loaded after
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;; collections.ss (the persistent ops it delegates to) and converters.ss.
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(define-record-type jolt-transient (fields (mutable coll) (mutable active))
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(nongenerative jolt-transient-v1))
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(define (jolt-transient-new coll) (make-jolt-transient coll #t))
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(define (jolt-trans-check t who)
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(unless (jolt-transient? t) (error #f (string-append who ": not a transient") t))
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(unless (jolt-transient-active t)
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(error #f (string-append who ": transient used after persistent!"))))
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(define (jolt-persistent! t)
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(jolt-trans-check t "persistent!")
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(jolt-transient-active-set! t #f)
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(jolt-transient-coll t))
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;; (conj!) with no args -> a fresh transient vector (Clojure); (conj! coll) is the
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;; 1-arity transducer-completion arity, which returns coll as-is with NO transient
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;; check (JVM: conj! 1-arity is identity); otherwise mutate t.
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(define (jolt-conj! . args)
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(cond
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((null? args) (jolt-transient-new (jolt-vector)))
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((null? (cdr args)) (car args))
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(else
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(let ((t (car args)) (xs (cdr args)))
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(jolt-trans-check t "conj!")
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(jolt-transient-coll-set! t (apply jolt-conj (jolt-transient-coll t) xs))
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t))))
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;; (assoc! t k v & kvs): variadic like Clojure (jolt-assoc already folds pairs).
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(define (jolt-assoc! t . kvs)
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(jolt-trans-check t "assoc!")
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(jolt-transient-coll-set! t (apply jolt-assoc (jolt-transient-coll t) kvs))
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t)
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(define (jolt-dissoc! t . ks)
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(jolt-trans-check t "dissoc!")
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(jolt-transient-coll-set! t (apply jolt-dissoc (jolt-transient-coll t) ks))
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t)
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(define (jolt-disj! t . xs)
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(jolt-trans-check t "disj!")
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(jolt-transient-coll-set! t (apply jolt-disj (jolt-transient-coll t) xs))
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t)
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(define (jolt-pop! t)
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(jolt-trans-check t "pop!")
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(jolt-transient-coll-set! t (jolt-pop (jolt-transient-coll t)))
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t)
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;; persistent disj over sets (pset-disj already exists in collections.ss).
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(define (jolt-disj s . xs)
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(let loop ((s s) (xs xs)) (if (null? xs) s (loop (pset-disj s (car xs)) (cdr xs)))))
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;; get / count / contains? see through a transient. Redefine the native procedures
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;; (captured first) so the existing emit lowerings (jolt-get/jolt-count/
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;; jolt-contains?) unwrap a transient before delegating; non-transients are
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;; untouched.
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(define (jolt-deref-transient x) (if (jolt-transient? x) (jolt-transient-coll x) x))
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(define %prev-jolt-get jolt-get)
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(set! jolt-get
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(case-lambda
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((coll k) (%prev-jolt-get (jolt-deref-transient coll) k))
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((coll k d) (%prev-jolt-get (jolt-deref-transient coll) k d))))
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(define %prev-jolt-count jolt-count)
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(set! jolt-count (lambda (coll) (%prev-jolt-count (jolt-deref-transient coll))))
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(define %prev-jolt-contains? jolt-contains?)
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(set! jolt-contains? (lambda (coll k) (%prev-jolt-contains? (jolt-deref-transient coll) k)))
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(define %prev-jolt-nth jolt-nth)
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(set! jolt-nth
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(case-lambda
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((coll i) (%prev-jolt-nth (jolt-deref-transient coll) i))
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((coll i d) (%prev-jolt-nth (jolt-deref-transient coll) i d))))
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(def-var! "clojure.core" "transient" jolt-transient-new)
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(def-var! "clojure.core" "persistent!" jolt-persistent!)
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(def-var! "clojure.core" "conj!" jolt-conj!)
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(def-var! "clojure.core" "assoc!" jolt-assoc!)
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(def-var! "clojure.core" "dissoc!" jolt-dissoc!)
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(def-var! "clojure.core" "disj!" jolt-disj!)
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(def-var! "clojure.core" "pop!" jolt-pop!)
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(def-var! "clojure.core" "disj" jolt-disj)
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