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core: Phase 4 — move ex-data/ex-message/ex-cause to the overlay

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The ex-info value exposes :jolt/type/:message/:data/:cause via get (it's the
caught value too), so the accessors are pure over get — no host surface. The
constructor (ex-info) stays in Janet since it wires into throw. A thrown
non-ex-info arrives wrapped as {:jolt/type :jolt/exception :value v}; the
overlay unwraps that, matching the old Janet helper. ex-cause now unwraps and
returns nil (not false) on non-ex values, matching Clojure. Added non-ex-info
and string regression cases.
This commit is contained in:
Yogthos 2026-06-07 20:17:03 -04:00
parent fcdf0ff535
commit 7f68a5872c
3 changed files with 23 additions and 13 deletions
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5
test/spec/exceptions-spec.janet
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@ -35,4 +35,7 @@
["catch binds thrown value" "42"
"(try (throw 42) (catch :default e e))"]
["rethrow preserves ex" "\"inner\""
"(try (try (throw (ex-info \"inner\" {})) (catch :default e (throw e))) (catch :default e (ex-message e)))"])
"(try (try (throw (ex-info \"inner\" {})) (catch :default e (throw e))) (catch :default e (ex-message e)))"]
["ex-data on non-ex" "nil" "(ex-data 42)"]
["ex-cause on non-ex" "nil" "(ex-cause {:k 1})"]
["ex-message of string" "\"hi\"" "(ex-message \"hi\")"])