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M2 item 4 landed at 3c1fb1b

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Joseph Ferano 2026-09-20 07:20:45 +07:00
parent 3c1fb1b31e
commit c71ae8020c
1 changed files with 9 additions and 1 deletions
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@ -422,7 +422,15 @@ rename. typed-flan branch freezes the static language pre-dyn.
container can grow and move, which would leave a push through dyn holding
a stale pointer.
4. nil: arrives with maps. nil <-> None at (Option T) boundaries, trap at
bare T, (Some nil) unconstructible.
bare T, (Some nil) unconstructible. — LANDED, 3c1fb1b. The bare-T trap is
split: a literal nil the checker can see is refused at compile time, in
expect itself; a dyn only known nil at run time still reaches
flan_dyn_need_i64's existing trap unchanged. (Option (Option T)) does not
cross either direction, same ambiguity as (Some nil). (Option dyn) is a
legal type the boundary code already treats correctly — the payload is
the identity, box and unbox both — but not yet a storable value anywhere:
the per-type-descriptor pass (item 2) refuses it the way it refuses (Vec
dyn), and item 4 does not lift that gate.
5. Typed = and != grow strings: bytewise, length + same-pointer fast paths,
both backends, one survey program. Ordering stays refused. — LANDED, daed039
6. defclass = named dyn map + shape tag; CLOS class dispatch AND