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real BigDecimal type (bigdec, M literals)

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bigdec / 1.5M / 0.0M silently produced doubles. Add a jbigdec value type
{unscaled, scale} over Chez exact integers (host/chez/bigdec.ss): value =
unscaled * 10^-scale. An M-suffix literal reads to a :bigdec form that the back
end lowers to jolt-bigdec-from-string (same IR-leaf path as #inst/#uuid); bigdec
coerces a number/string. Equality is by value (1.0M = 1.00M true, 3M = 3 false),
str drops the M and pr keeps it, class is java.math.BigDecimal, decimal? is true.
Arithmetic contagion isn't modelled (out of scope). The old corpus cases passed
spuriously as doubles; they now exercise a genuine BigDecimal.
This commit is contained in:
Yogthos 2026-06-22 00:01:01 -04:00
parent 7db5fabc8d
commit ab96650fbb
10 changed files with 288 additions and 191 deletions
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3
jolt-core/clojure/core/20-coll.clj
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@ -798,8 +798,7 @@
(defn clojure-version [] "1.11.0-jolt")
;; Jolt numbers are doubles; no BigDecimal, no ratios.
(defn bigdec [x] (* 1.0 x))
;; bigdec is a host fn (host/chez/bigdec.ss) — a real BigDecimal value type.
(defn numerator [x] (throw (ex-info "numerator requires a ratio (Jolt has no ratios)" {})))
(defn denominator [x] (throw (ex-info "denominator requires a ratio (Jolt has no ratios)" {})))