Sixth pure-fn batch (jolt-1j0 phase 2), 3 leaf fns, now with regression tests
per the per-batch workflow. reductions is the canonical form, so (reductions f [])
calls (f) -> [0] instead of the prior []; tree-seq is eager pre-order DFS.
conformance 228/228 x3, clojure-test-suite 3929, full suite green, bench A/B flat.
Two correctness bugs found while migrating:
- nthrest returned nil where Clojure returns () : for n>0 the walk yields
(seq xs) wrapped in (or ... ()), so an exhausted/nil walk is () not nil
(only n<=0 returns coll). Both the prior Janet impl and the first overlay
port got this wrong. nthrest.cljc 13/1/0 -> 14/0/0.
- if-let/when-let/if-some/when-some leaked their binding into the else branch:
they wrapped the whole if in (let* [name val] ...), so (let [x 5] (if-let
[x nil] x x)) returned nil instead of 5. Fixed to bind a fresh temp around the
if and rebind the name only inside the taken branch, matching Clojure.
conformance 218/218 x3, clojure-test-suite 3928 -> 3929.
Fifth pure-fn batch (jolt-1j0 phase 2), 6 leaf fns. nthrest uses the canonical
loop form (same neutral 13/1/0 on nthrest.cljc as the prior Janet version; the
1 fail is a pre-existing platform-conditional case). object?/undefined? are
always false on Jolt.
conformance 218/218 x3, clojure-test-suite 3928, core-bench A/B noise-only.
Fourth pure-fn batch (jolt-1j0 phase 2), 6 leaf fns. distinct? now uses
value-semantics (the prior Janet impl keyed a table by identity, so equal
collections compared distinct); nthnext uses the canonical loop form, which
fixes (nthnext nil nil) => nil and the nil-count cases the prior pre-check threw
on. replace preserves nil values via get-with-default.
conformance 218/218 x3, clojure-test-suite 3927 -> 3928 (canonical nthnext),
core-bench A/B flat. Per-batch gate caught a transient -1 from the first
nthnext rewrite; fixed before commit.
Second pure-fn batch (jolt-1j0 phase 2). All leaf fns; canonical Clojure defs.
split-with now returns seqs for the parts (drop-while is a seq), matching
Clojure rather than the prior all-vector result — value-equal either way.
conformance 218/218 x3, clojure-test-suite 3927, core-bench 2333ms (~baseline).
First pure-fn migration batch. Both are leaf fns (no internal Janet callers);
the Clojure defs (not . some / not . every?) match the prior Janet behavior.
Removed the core-* defns and their core-bindings entries.
conformance 218/218 x3, clojure-test-suite 3927, core-bench 2340ms vs 2336ms
baseline (noise).
Classify the 421 core-* fns into seed/macro/host/lazy/movable buckets and record
a compile-mode benchmark baseline to catch regressions as fns move from native
Janet to the self-hosted overlay. Worklist in jolt-core/clojure/core/MIGRATION.md.
Finding: after seed + host, the self-hosted compiler uses no clojure.core fns
beyond the existing kernel tier (+ atom/swap!/reset! host primitives), so the
compiler-dep kernel tier is already complete — confirmed by self-host
conformance passing.
Three pure function combinators into the collection tier, as compositions of
mapv/every?/some/apply. Three more core-* primitives + table entries gone.
Battery 3916 -> 3920 (the canonical defs are more correct than the prior Janet
ones — some-fn returns the matching value, every-pred is properly boolean).
Conformance 218/218 all modes.
New collection tier (core/20-coll.clj): six pure, eager fns expressed as
compositions of frozen primitives (reduce/assoc/get/conj/filter/vec). Six more
core-* primitives + table entries gone from the Janet kernel.
Two semantics to preserve, caught by the suite:
- max-key/min-key use the canonical multi-arity form (strict </> on the first
pair, <=/>= in the fold) to reproduce the JVM IEEE-754 NaN behavior; a single
reduce got the NaN cases wrong.
- frequencies/group-by base on (hash-map), not the {} literal: a struct map
doesn't canonicalize collection keys across representations ({:a 1} literal vs
(hash-map :a 1)), a PHM does — same reason the Janet impl used make-phm.
Conformance 218/218 all modes; battery holds 3916.
First fractal turn of the multi-stage bootstrap (jolt-tzo). The Clojure part of
clojure.core is now loaded in ordered tiers under jolt-core/clojure/core/. The
kernel tier (00-kernel: second/peek/subvec/mapv/update) holds the structural fns
the self-hosted compiler itself uses; in compile mode it is bootstrap-compiled
into clojure.core BEFORE the analyzer is built, so the analyzer binds those names
to the Clojure definitions instead of a not-yet-defined forward ref. That removes
the circularity that previously forced these to stay in Janet — the five core-*
primitives and their init-core! entries are gone.
Mechanism: backend/bootstrap-load-source (generalized from compile-load) builds a
source string into a target ns via the bootstrap; rebuild-compiler! recompiles
the self-hosted compiler against the current core (the rail for future turns,
exercised by the new fixpoint test). api/load-core-overlay! walks the ordered
tiers, bootstrap-loading kernel tiers and self-hosting the rest.
Also fixes a latent evaluator bug surfaced by the move: a fn rebinds current-ns
to its defining ns while it runs and restores on normal return, but a fn that
THREW unwound past its own restore, leaking the ns. try now restores the
try-entry ns on the catch/finally path, so referred-symbol resolution survives a
caught error (this was breaking is/testing in the suite harness after any thrown
assertion). Net battery +3 (3913 -> 3916); conformance 218/218 in all three
modes; binary builds and runs the embedded tiers.
