A `union` declaration produced no symbol at all in any of the four
languages that have one. The type never entered the graph, and neither
did anything attached to it — in Rust every `impl Trait for MyUnion`
lost its edge, and the impl's methods were left with a qualifiedName
pointing at a type the graph did not contain.
`union_specifier` / `union_item` were absent from the extraction layer
entirely: no `<x>Types` list on the TS side, no dispatch branch in
either kernel walker.
They join `structTypes` (kind `struct` — NodeKind has no `union`), which
is the extension point the table-driven extractors already provide. The
body guard in extractStruct is untouched, so a bodiless `union U;` stays
a forward declaration and is still skipped, exactly like `struct U;`.
`resolveTypeAliasKind` accepts `union_specifier` too, so
`typedef union { … } N;` takes the typedef's name the way
`typedef struct { … } N;` already did. Without it the anonymous union
body would mint a second `<anonymous>` node beside the alias.
Both walkers change together so kernel<->wasm parity holds.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
