shoney.arickathil
f282451867
Closes json's two documented fidelity limits (iteration 5 strictness): - field_class gains WOB_FIELD_BOOL (a plain `Bool` field) and WOB_FIELD_NIL_BOOL (a `?Bool`: WO_NIL_SCALAR nil + bool encoding) — the kind byte alone cannot tell a Bool slot from an Int slot, so the metadata carries it. Emitter writes them (field_class_meta); loader whitelists them; json.c encodes `true`/`false` (and `null` for a ?Bool nil), decode's null/omitted-key pre-write covers NIL_BOOL. - A JSON number with a fraction or exponent is MALFORMED for an Int field: the checked decode (`json.decode(t) as T`) yields nil for the whole document instead of silently truncating 3.7 to 3 — the language has no float, and corrupting data quietly was the one thing a "checked decode" must never do. Floats stay representable through a raw `json.Value` field. - corpus: run/json-bool-fidelity pins the round-trip (true/false both ways, ?Bool null both ways, fraction AND exponent rejected). - Board's two known-gap entries struck; format doc's field_class marker list extended. Verified: oop-e2e 87/0; runtime test + test-iso OK; woc-test 540/0; log-watcher 7/0; employee 8/0. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
25 lines
944 B
Text
25 lines
944 B
Text
-- json fidelity (iteration 5 strictness): a Bool field encodes true/false
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-- (WOB_FIELD_BOOL / WOB_FIELD_NIL_BOOL in field_class — the kind byte alone
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-- cannot tell Bool from Int), a ?Bool nil is null both ways, and a JSON
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-- number with a fraction or exponent is MALFORMED for an Int field: the
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-- checked decode yields nil instead of silently truncating.
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use json
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class Flags {
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on: Bool
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maybe: ?Bool
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n: Int
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}
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fn main() -> Int {
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print(json.encode(Flags { on: true, maybe: nil, n: 7 }));
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let back = json.decode("{\"on\":false,\"maybe\":true,\"n\":9}") as Flags;
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if back != nil {
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print(json.encode(Flags { on: back.on, maybe: back.maybe, n: back.n }));
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}
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let frac = json.decode("{\"on\":true,\"maybe\":null,\"n\":3.7}") as Flags;
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if frac == nil { print("fraction rejected"); }
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let expo = json.decode("{\"on\":true,\"maybe\":null,\"n\":2e3}") as Flags;
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if expo == nil { print("exponent rejected"); }
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return 0;
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}
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