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isaac
90b2ba0bd4
Generated parse_<ctor>(...) for constructors with conditional fields
used to emit 'if Int(_N!) & Int(1 << K) != 0 { ... }' as the gate,
and 'let _cM = (Int(_N!) & Int(1 << K) == 0) || _M != nil' as the
per-field validation. Both force-unwrap _N (the flags field read)
before the bottom-of-function '_cN = _N != nil' validation runs,
so a buffer short enough to fail the flags read traps
deterministically instead of returning nil.
Replace the force-unwraps with (_N ?? 0). Missing flags then reads
as "all bits off": every gated branch is skipped, each flag-gated
_cM short-circuits to true via the '== 0' clause, and the flags
field's own _cN = _N != nil still fails so the overall constructor
validation falls through to return nil — matching the intended
"return nil on truncated buffer" contract.
Touches both generator emit paths (flat generateImplFile and layered
emitLayeredType). Regenerated Api*/SecretApiLayer*.swift follow in a
separate commit.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>