Macros are now compiled, not interpreted, by steady state — matching
Clojure (macros are ordinary compiled fns the Java seed compiles for
clojure.core) and ClojureScript (macros compiled, invoked at compile
time). Neither reference keeps an interpreted-closure fallback.
The early macros (00-syntax) are defined while the self-hosted analyzer
is still being bootstrapped (it builds lazily after the overlay loads),
so macro-compile-hook returns nil and they get an interpreted closure.
The bootstrap compiler.janet can't substitute (it punts on syntax-quote,
which nearly every expander uses).
Fix = staged bootstrap, the same pattern as the compiler fixpoint:
defmacro stashes the expander source on the var (:macro-src) plus a
:macro-uses-env flag; once the overlay + analyzer are fully built,
backend/recompile-macros! (via ensure-macros-compiled! at the end of
load-core-overlay!) compiles each stashed expander through the now-live
analyzer and rebinds the var, marking :macro-compiled. Idempotent;
&env/&form macros keep the interpreted closure (the compiled fn* has no
such params). The interpreter is now a build-time crutch, gone by
steady state.
Rewrote if-not/if-let/if-some/assert from '& [else]' rest-destructuring
(which the analyzer punts on) to a plain rest param + (first rest), so
all 47 overlay macros compile. Analyzer rest-destructuring gap: jolt-f79.
47/47 overlay macros compiled, 0 interpreted; user macros compile
immediately post-init. Gate green: conformance 267x3, fallback-zero
31/5, bootstrap-fixpoint stage1==2==3, self-host, staged-bootstrap,
lazy-infinite 44/44, clojure-test-suite >=4034/67, sci-bootstrap,
features 78/78, all unit+spec, core-bench neutral.
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