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zeekay
bfaa9812dd
Completes the variable-length codegen (strings/bytes/lists/nested) — the last shape needed before protoc-gen-zap can map every proto message field mechanically. Runtime (v1/nested.go): - NestedAt[S,N]: read an out-of-line 4-byte object pointer as a typed View[N]; null/OOB -> zero View (proto3 unset). - WriteNested[S,N]: build a flat nested object into the parent tail and patch the pointer; the singular peer of WriteList. Composes recursively (nested may carry scalars, strings, bytes, lists, further nesting). Codegen (schema.go, emit.go): - Field.Nested *NestedMsg (4-byte object pointer, distinct from the 8-byte list/tail pointer); IsNested(). - Constructor takes *Value (nil => null), nil-guarded WriteNested build. - emitNestedSupport: value struct + NestedAt read accessor. - emitElemWrites: shared scalar/string/bytes element-write body, so list elements now also support string/bytes sub-fields (repeated-of-message). - ListElem/NestedMsg carry Wire (element WireName) for Offset<Wire>_<F>. Proven end-to-end: runtime roundtrip (nested w/ own string tail + null case), generator-output tests (go/parser-valid), and a generated-code wire roundtrip (testpkg/nestwire). Full v1+codegen suite green, no regression.