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Checked narrow casts; fix runtime require in self-contained-built binaries

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byte/short/int/long/char silently wrapped or passed out-of-range values
through; the JVM range-checks (RT.byteCast family). One checked-cast
helper now carries the ranges: a double range-checks ITSELF before
truncating ((byte 1.1) is 1, (byte 127.000001) throws), NaN casts to 0,
ratios and bigdecs truncate, a non-number is CCE, and the throw carries
the JVM message. float range-checks against Float/MAX_VALUE. The
unchecked-* casts now genuinely wrap and sign-fold ((unchecked-byte 200)
is -56 — the old bit-and lost the sign) with doubles saturating like
Java's conversions; unchecked-long/int are host natives. double/float of
a bigdec convert instead of crashing. The no-single-float residue stays
accepted (SPEC.md).

Also fixes #290: a binary built by the SELF-CONTAINED joltc died with
'variable var-deref is not bound' when a namespace loaded at runtime.
The in-process build compiled flat.ss against a clean copy-environment,
which orphans every top-level define in locations the binary's runtime
eval can't see. It now compiles against the default interaction
environment (defines land in the real symbol cells, same as the legacy
fresh-Chez path) and a generated prologue pre-binds each kernel name the
runtime redefines to its kernel value, so the earliest boot reads match
the legacy path's primitive references. requiring-resolve is implemented
(the issue's dynamic-require pattern), and the release workflow smokes a
runtime require in a built binary.

Cast namespaces byte/short/int/long/char now fully clean; cts baseline
5805 -> 5857 pass, 67 baselined namespaces. 7 JVM-certified corpus rows.
This commit is contained in:
Yogthos 2026-07-02 09:42:06 -04:00
parent f80f9aab4b
commit d0e1a11934
10 changed files with 237 additions and 77 deletions
Download patch file Download diff file Expand all files Collapse all files

13
host/chez/java/bigdec.ss
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@ -355,6 +355,19 @@
(else (jolt-num-cast-throw x))))
(def-var! "clojure.core" "rationalize" jolt-rationalize)
;; double/float of a bigdec is its flonum value.
(set! jolt-double-slow
(let ((prev jolt-double-slow))
(lambda (x) (if (jbigdec? x) (jbigdec->flonum x) (prev x)))))
;; narrow casts truncate a bigdec like Number.longValue.
(set! jolt-cast-truncate-slow
(let ((prev jolt-cast-truncate-slow))
(lambda (x)
(if (jbigdec? x)
(truncate (/ (jbigdec-unscaled x) (expt 10 (jbigdec-scale x))))
(prev x)))))
;; compare: add a bigdec arm (enables compare / sort / sorted collections). A
;; bigdec vs a plain number compares by value; bigdec vs bigdec is scale-independent.
(define jbd-prev-compare jolt-compare)