48e2ef5910
Rephrase comments that pointed at deleted Janet files (emit.janet, the seed
sources, 'the Janet back end punts ...') to present-tense descriptions of the
Chez behavior. Comment/docstring-only; the self-host fixpoint is unchanged
(comments don't affect the compiled seed).
Delete five files that were Janet-host shims with no Chez path: clojure.java.io
(provided natively by host/chez/io.ss), and jolt.{nrepl,png,interop,shell}
(the janet.* bridge, os/shell, janet.net — none exist on Chez).
jolt-cf1q.6
69 lines
No EOL
2.8 KiB
Clojure
69 lines
No EOL
2.8 KiB
Clojure
;; clojure.core — seq tier. Pure-Clojure leaf sequence fns on top of the kernel
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;; tier (00-kernel) and the host primitives. Loaded after the kernel tier; in compile
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;; mode these self-host through the now-built analyzer (interpreted otherwise).
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;;
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;; Migration rule for adding fns here: the fn must (1) NOT be in
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;; compiler/core-renames (that map emits core-X Janet symbols directly), (2) have
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;; no internal Janet callers of its core-X binding, and (3) NOT be used by the
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;; self-hosted compiler (jolt-core/jolt/*.clj). Compiler-facing structural fns go
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;; in the kernel tier (00-kernel) instead — see its header.
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;; Volatiles (moved up from 20-coll: this tier's transducers use them, and the
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;; analyzer now ERRORS on unresolved forward references — jolt-2o7.3). The
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;; constructor (volatile!) stays native; these are pure over ref-put!/get.
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(defn vreset! [vol newval]
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(jolt.host/ref-put! vol :val newval) newval)
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(defn vswap! [vol f & args]
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(vreset! vol (apply f (get vol :val) args)))
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(defn ffirst [coll] (first (first coll)))
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(defn nfirst [coll] (next (first coll)))
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(defn fnext [coll] (first (next coll)))
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(defn nnext [coll] (next (next coll)))
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;; Canonical Clojure defs: pure first/next/loop/recur, no Janet realize-for-iteration.
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(defn last [s]
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(if (next s) (recur (next s)) (first s)))
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(defn butlast [s]
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(loop [ret [] s s]
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(if (next s)
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(recur (conj ret (first s)) (next s))
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(seq ret))))
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;; partition-by: (partition-by f) is a stateful transducer (buffer a run, emit on
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;; key change, flush on completion — via volatiles, matching Clojure); (partition-by
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;; f coll) is the lazy collection arity.
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(defn partition-by
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([f]
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(fn [rf]
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(let [buf (volatile! [])
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pv (volatile! nil)
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started (volatile! false)]
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(fn
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([] (rf))
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([result]
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(let [b @buf
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result (if (zero? (count b))
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result
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(do (vreset! buf []) (unreduced (rf result b))))]
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(rf result)))
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([result input]
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(let [val (f input)]
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(if (or (not @started) (= val @pv))
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(do (vreset! started true) (vreset! pv val) (vswap! buf conj input) result)
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(let [b @buf]
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(vreset! buf []) (vreset! pv val)
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(let [ret (rf result b)]
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(when-not (reduced? ret) (vswap! buf conj input))
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ret)))))))))
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([f coll]
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(let [step (fn step [s]
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(lazy-seq
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(let [s (seq s)]
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(when s
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(let [fst (first s)
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fv (f fst)
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run (cons fst (take-while (fn [x] (= fv (f x))) (rest s)))]
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(cons run (step (lazy-seq (drop (count run) s)))))))))]
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(step coll)))) |