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Chez Phase 2 (inc R): . / .-field dot-form desugar (jolt-kuic)

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The analyzer lowers the `.` special form (. target member arg*) and the
.-field field-access head to a :host-call instead of leaving them
uncompilable. Janet behaviour is unchanged — its back end punts :host-call
to the interpreter, which re-runs the original `.` form via eval-dot.

The Chez back end routes a non-shimmed :host-call through
record-method-dispatch, extended by a new host/chez/dot-forms.ss with the
arms dispatch-member covers but the record/string base did not, mirroring
src/jolt/interop/collections.janet precedence:

  - collection interop first (count/seq/nth/get/valAt/containsKey on a
    vector/map/set), so (. {:count 9} count) is the entry count like the seed
  - field access for a "-name" member (records and maps)
  - the seed's universal object-methods (getMessage/getCause/toString/
    hashCode/equals) on a non-record map, winning over a field lookup
  - non-record map member: a stored fn is a method called with self, else
    the field value

Raw seqs are excluded from coll interop — the seed's behaviour there is
representation-dependent (plain (seq v) vs a lazy-seq) and a normalized cseq
can't mirror it. Also added getMessage/getLocalizedMessage/equals to the
string method surface so a thrown string / Exception. ctor (which keeps the
message string) answers .getMessage.

Parity 2134 -> 2150, 0 new divergences. New test/chez/_dotform.janet 26/26;
emit-test 331/331.
This commit is contained in:
Yogthos 2026-06-19 00:32:30 -04:00
parent c90c4cb610
commit 1f96351acb
8 changed files with 224 additions and 2 deletions
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5
host/chez/natives-str.ss
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@ -124,6 +124,11 @@
((string=? method "replaceFirst") (irregex-replace (str-irx (arg 0)) s (arg 1)))
((string=? method "split")
(apply jolt-vector (str-split-drop-trailing (irregex-split (str-irx (arg 0)) s))))
;; universal object-methods that reach a string target (seed object-methods):
;; a thrown string / Exception. ctor (which keeps the message string) answers
;; getMessage with itself; equals is value equality.
((or (string=? method "getMessage") (string=? method "getLocalizedMessage")) s)
((string=? method "equals") (and (string? (arg 0)) (string=? s (arg 0))))
(else (error #f (string-append "No method " method " for value")))))
;; --- clojure.core str-* primitives (the substrate clojure.string.clj calls) ---