d3194aae59
adds self-hosted compiler is functionally: - The default compile path is the portable pipeline using jolt.analyzer (Clojure) → host-neutral IR → backend.janet. - The analyzer is itself Clojure, compiled by jolt for true self-hosting. - bootstrap-fixpoint passes (stage1 == stage2 == stage3): rebuilding the compiler on its own output. - clojure.core is now self-hosted in the overlay. - Stateful forms (defmacro/ns/deftype/defmulti/require/in-ns) are interpreted by design.
100 lines
2.6 KiB
Clojure
100 lines
2.6 KiB
Clojure
;; clojure.core — lazy tier. Canonical CLJS-based lazy seq fns.
|
|
;; Loaded after 30-macros.clj, so lazy-seq macro is available.
|
|
;;
|
|
;; Each fn ported from CLJS core.cljs, stripped of chunked-seq branches.
|
|
|
|
;; --- distinct ---
|
|
(defn distinct [coll]
|
|
(let [step (fn step [xs seen]
|
|
(lazy-seq
|
|
((fn [[f :as xs] seen]
|
|
(when-let [s (seq xs)]
|
|
(if (contains? seen f)
|
|
(recur (rest s) seen)
|
|
(cons f (step (rest s) (conj seen f))))))
|
|
xs seen)))]
|
|
(step coll #{})))
|
|
|
|
|
|
;; --- keep ---
|
|
(defn keep
|
|
([f]
|
|
(fn [rf]
|
|
(fn ([] (rf)) ([result] (rf result))
|
|
([result input]
|
|
(let [v (f input)]
|
|
(if (nil? v) result (rf result v)))))))
|
|
([f coll]
|
|
(lazy-seq
|
|
(when-let [s (seq coll)]
|
|
(let [x (f (first s))]
|
|
(if (nil? x)
|
|
(keep f (rest s))
|
|
(cons x (keep f (rest s)))))))))
|
|
|
|
;; --- keep-indexed ---
|
|
(defn keep-indexed
|
|
([f]
|
|
(fn [rf]
|
|
(let [ia (volatile! -1)]
|
|
(fn ([] (rf)) ([result] (rf result))
|
|
([result input]
|
|
(let [i (vswap! ia inc)
|
|
v (f i input)]
|
|
(if (nil? v) result (rf result v))))))))
|
|
([f coll]
|
|
(letfn [(keepi [idx coll]
|
|
(lazy-seq
|
|
(when-let [s (seq coll)]
|
|
(let [x (f idx (first s))]
|
|
(if (nil? x)
|
|
(keepi (inc idx) (rest s))
|
|
(cons x (keepi (inc idx) (rest s))))))))]
|
|
(keepi 0 coll))))
|
|
|
|
;; --- map-indexed ---
|
|
(defn map-indexed
|
|
([f]
|
|
(fn [rf]
|
|
(let [i (volatile! -1)]
|
|
(fn ([] (rf)) ([result] (rf result))
|
|
([result input] (rf result (f (vswap! i inc) input)))))))
|
|
([f coll]
|
|
(letfn [(mapi [idx coll]
|
|
(lazy-seq
|
|
(when-let [s (seq coll)]
|
|
(cons (f idx (first s)) (mapi (inc idx) (rest s))))))]
|
|
(mapi 0 coll))))
|
|
|
|
;; --- cycle ---
|
|
(defn cycle [coll]
|
|
(if-let [vals (seq coll)]
|
|
(let [n (count vals)]
|
|
(letfn [(cstep [i]
|
|
(lazy-seq
|
|
(cons (nth vals (mod i n)) (cstep (inc i)))))]
|
|
(cstep 0)))
|
|
()))
|
|
|
|
;; --- repeatedly ---
|
|
(defn repeatedly
|
|
([f] (lazy-seq (cons (f) (repeatedly f))))
|
|
([n f] (take n (repeatedly f))))
|
|
|
|
;; --- repeat ---
|
|
(defn repeat
|
|
([x] (lazy-seq (cons x (repeat x))))
|
|
([n x] (take n (repeat x))))
|
|
|
|
;; --- iterate ---
|
|
(defn iterate [f x]
|
|
(lazy-seq (cons x (iterate f (f x)))))
|
|
|
|
|
|
;; --- partition-all ---
|
|
(defn partition-all
|
|
([n coll] (partition-all n n coll))
|
|
([n step coll]
|
|
(lazy-seq
|
|
(when-let [s (seq coll)]
|
|
(cons (take n s) (partition-all n step (nthrest coll step)))))))
|