7d0070d873
Reader gaps the Chez-hosted analyzer hit where the Janet reader didn't:
- ##Inf / ##-Inf / ##NaN symbolic literals (## dispatch -> flonum).
- #(...) anonymous fn shorthand -> (fn* [p__N#] body), with % / %N / %& and the
max-positional arity rule; scans + rewrites list/vector/set/map bodies.
- #?(...) reader conditional: feature set {:jolt :default}, first matching clause
wins. #?@ splicing not yet supported (one niche case allowlisted).
- (ns name (:require [a :as x])) — the require pre-scan now also reads aliases
from an ns form's :require/:use clauses, not just bare (require ...).
Zero-Janet corpus parity 2240 -> 2288, 0 divergences (2 now-reachable cases
allowlisted: str of Infinity inside a collection — same as the prelude gate —
and #?@ splice). spine-test 35/35; prelude parity 2295 unchanged, 0 new
divergences.
70 lines
3.7 KiB
Scheme
70 lines
3.7 KiB
Scheme
;; compile-eval.ss (jolt-hs9n, Phase 3 inc6) — the zero-Janet compile spine.
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;;
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;; Ties together the cross-compiled compiler image (jolt.ir + jolt.analyzer +
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;; jolt.backend-scheme, loaded as def-var! forms) and the host contract
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;; (host-contract.ss) into a runtime entry: a Clojure source string is read by the
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;; Chez data reader, analyzed by the ON-CHEZ analyzer to IR, emitted to Scheme by
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;; the ON-CHEZ emitter, and eval'd — no Janet in the loop. This is the spine the
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;; stage2==stage3 bootstrap fixpoint (later increments) closes over.
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;;
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;; Loaded after host-contract.ss + the compiler image.
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(define jolt-ce-analyze (var-deref "jolt.analyzer" "analyze"))
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(define jolt-ce-emit (var-deref "jolt.backend-scheme" "emit"))
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(define jolt-ce-read (var-deref "clojure.core" "read-string"))
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;; The zero-Janet spine ALWAYS runs with the full clojure.core prelude loaded, so a
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;; clojure.* ref must lower to var-deref (resolved from the prelude), not trip the
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;; emitter's "unsupported stdlib fn (no core on Chez yet)" out-of-subset guard —
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;; that guard is only for the bare -e subset with no prelude. Turn prelude mode on
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;; once, here, so every analyze->emit on this spine sees the full core (jolt-qjr0).
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((var-deref "jolt.backend-scheme" "set-prelude-mode!") #t)
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;; (quote X) -> X, else x — unwraps a quoted require spec.
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(define (ce-unquote x)
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(if (and (cseq? x) (cseq-list? x))
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(let ((items (seq->list x)))
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(if (and (pair? items) (symbol-t? (car items))
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(string=? (symbol-t-name (car items)) "quote") (pair? (cdr items)))
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(cadr items) x))
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x))
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;; Pre-register any (require ...)/(use ...) :as aliases under `ns` BEFORE analysis,
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;; so a qualified s/foo resolves while compiling (analysis precedes the runtime
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;; require). Walks the whole form (a require may be nested in a do/let). jolt-qjr0.
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(define (ce-clause-require? cl) ; (:require ...) / (:use ...) ns clause
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(and (pair? cl) (keyword? (car cl))
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(let ((kn (keyword-t-name (car cl)))) (or (string=? kn "require") (string=? kn "use")))))
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(define (ce-scan-requires! form ns)
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(when (and (cseq? form) (cseq-list? form))
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(let ((items (seq->list form)))
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(when (pair? items)
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(let* ((h (car items)) (hn (and (symbol-t? h) (symbol-t-name h))))
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(cond
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;; (require spec...) / (use spec...) — specs are quoted
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((and hn (or (string=? hn "require") (string=? hn "use")))
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(for-each (lambda (a) (chez-register-spec! ns (ce-unquote a))) (cdr items)))
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;; (ns name (:require [a :as x]) ...) — clause specs are literal
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((and hn (string=? hn "ns"))
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(for-each (lambda (clause)
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(when (and (cseq? clause) (cseq-list? clause))
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(let ((cl (seq->list clause)))
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(when (ce-clause-require? cl)
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(for-each (lambda (spec) (chez-register-spec! ns spec)) (cdr cl))))))
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(if (pair? (cdr items)) (cddr items) '())))
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(else (for-each (lambda (x) (ce-scan-requires! x ns)) items))))))))
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;; Source string -> Scheme source string (read -> analyze -> emit, all on Chez).
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;; `ns` is the compile namespace unqualified symbols resolve against.
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(define (jolt-analyze-emit src ns)
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(let* ((form (jolt-ce-read src)))
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(ce-scan-requires! form ns)
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(let* ((ctx (make-analyze-ctx ns))
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(ir (jolt-ce-analyze ctx form)))
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(jolt-ce-emit ir))))
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;; Source string -> value (compile on Chez, then eval the emitted Scheme in the
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;; top-level environment where rt.ss's runtime procedures live).
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(define (jolt-compile-eval src ns)
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(eval (read (open-input-string (jolt-analyze-emit src ns)))
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(interaction-environment)))
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