Last core macro still in Janet. Goes in 00-syntax (not 30-macros with its
if-let/if-some/when-some siblings) because 20-coll's not-empty uses it and
20-coll loads before 30. Via `let` so the binding form may destructure,
matching Clojure — the old Janet version used let* and wouldn't.
Drops core-when-let + the sym* helper + the intern entry, and empties
core-macro-names (no seed binding is a macro anymore).
lazy-seq wraps its body in (make-lazy-seq (fn* [] (coll->cells (do ...)))); lazy-cat
wraps each coll in lazy-seq and concats (concat is already lazy). Both user-facing,
in 30-macros. Also drop two now-stale comments. Laziness preserved (lazy-seqs-spec
20/20, including infinite/self-referential).
conformance 228x3, fixpoint, clojure-test-suite 3930, full suite green.
defprotocol/defrecord/extend-type/extend-protocol/reify + the extend/proxy/
definterface stubs move to 30-macros (user-facing, not used by the compiler). They
emit Jolt's protocol/type special forms (protocol-dispatch/register-method/
make-reified/deftype).
The one subtlety: a protocol value is a :jolt/type-tagged struct, and the
interpreter can't tell an embedded opaque value from a tagged map literal being
constructed. So defprotocol builds it via a make-protocol fn call (exposed from
core) instead of an embedded literal — a fn result evaluates normally and even
compiles. reify emits a {kw (fn* ...)} map literal that make-reified evaluates
(build-eval-map yields a struct it can iterate, unlike a hash-map phm). defrecord
vecs its spliced field-let bindings (a lazy mapcat seq won't splice) and uses an
explicit fresh-sym for the map-> param (auto-gensym doesn't cross nested
syntax-quotes).
protocols-spec 21/21, conformance 228x3, fixpoint, clojure-test-suite 3930, full
suite green.
Phase 3 batch 6 (jolt-1j0). binding installs an array-map var->value thread
frame and restores it on exit via try/finally. Dynamic rebinding is seen by
called fns. This completes the cleanly-portable safe macros (19 total).
conformance 228/228 x3, full suite green.
Phase 3 batch 5 (jolt-1j0). condp with a recursive emit building the nested if
chain, including the test :>> result-fn form and the trailing default. This
exhausts the cleanly-portable safe macros.
conformance 228/228 x3, full suite green.
Phase 3 batch 4 (jolt-1j0), 5 macros. cond->> (thread-last) is safe; cond->
stays (compiler uses it). delay/future expand to make-delay/future-call host
fns; letfn builds its fn* binding via a template (cons/list in a macro body make
a plist the evaluator can't call as a form).
conformance 228/228 x3, clojure-test-suite 3930, full suite green, bench flat.
Phase 3 batch 3 (jolt-1j0), 5 macros. Establishes the macro-body toolkit:
fresh-sym = (symbol (str (gensym))) for a shared explicit jolt symbol (a bare
(gensym) returns a Janet symbol the destructurer rejects), and splicing binding
pairs into a TEMPLATE vector so core-let sees a tuple form, not a runtime pvec.
when-first stays first-based (lazy-safe): Clojure's (seq coll) form realizes an
infinite coll like (repeat nil) under Jolt's eager evaluator and hangs — the
per-batch battery caught it (when_first.cljc). Clojure-correct seq form waits on
Phase 5 laziness.
conformance 228/228 x3, clojure-test-suite 3930, full suite green, bench flat.
Phase 3 batch 2 (jolt-1j0), 5 user-facing macros as defmacro + syntax-quote.
The conditional-binding macros use the auto-gensym temp# idiom so the name binds
only in the taken branch (the else/empty branch sees the outer scope, carrying
forward the earlier scope fix). when-let stays in Janet for now — 20-coll uses
it, so it must remain available before the macro tier loads.
Note: gensym in a macro body resolves to Janet's 0-arity builtin, so explicit
(gensym "prefix") fails — use template auto-gensym (foo#) instead.
conformance 228/228 x3, full suite green (incl. the if-let scope regression spec,
now exercising the overlay macro), clojure-test-suite 3930, bench A/B flat.
New 30-macros tier (registered after 20-coll) for user-facing macros expressed as
defmacro + syntax-quote instead of hand-built Janet form-transformers. Validated
end to end: overlay-defined macros expand in interpret, compile AND self-host
modes (conformance 228/228 x3).
Moved comment and if-not; removed their Janet core-X fns + core-macro-names
entries. Note: Jolt defmacro is single-arity, so multi-arglist macros become one
arglist with & rest / destructuring (if-not uses [test then & [else]]). Macros
used by the compiler or earlier tiers (and/or/when/cond/case/cond->/->/declare/
doseq/when-let) stay in Janet until a load-order story exists for them.
full suite green, clojure-test-suite 3930.
