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zeekay
592493a51d
Completes the variable-length codegen (strings/bytes already shipped; lists now
join them). A list field of a fixed-size element schema generates: a per-element
value-input struct, a typed constructor param []Elem, an inline WriteList build
(bridged onto the hand-rolled ObjectBuilder by the new zapv1.SetterFrom, one
zapv1.Write per element field), and a zero-copy ListAt read accessor returning
zapv1.List[E] (range-over-func ready) — mechanically reproducing examples/
batch_tx.go.
Adds: Schema.Element (flat list-element slots carry no kind byte — fields may
start at offset 0; Wrap skips the kind check); runtime helpers SetterFrom /
WriteString / WriteBytes bridging the hand-rolled fast path to the typed writers.
Proven end-to-end: testpkg/listwire round-trips a BatchTx{scalar + []Item}
through build -> wrap -> ListAt.All() with every element read zero-copy
(TestRoundTrip_List), plus generator-output tests (valid Go via go/parser +
construct assertions). Existing golden tests unchanged.