Struct-returning methods now hand back a typed Go struct instead of the raw
CBOR/bytes. Since the native return POD is freed right after the callback, the
POD->Go conversion must happen in-callback: the generator emits a `fromC()`
reader per {.ffi.} type and, per struct-returning proc, an exported Go result
callback. The method calls the native entry point directly with that callback
and a `runtime/cgo.Handle` (boxed in a small C allocation so it travels through
the void* userData checkptr-safe), then blocks until the callback delivers the
typed value or error on the result slot.
String/raw-returning procs keep the existing C-bridge + condvar path. Validated
end-to-end (Echo/Complex/Schedule) including under `go run -race`.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
The Go generator previously emitted a `// SKIPPED` stub for any proc with a
struct, sequence or optional parameter, leaving Echo/Complex/Schedule
uncallable. Now that the native ABI carries those as flat C-POD structs, the Go
side can marshal them: emit an idiomatic Go struct per {.ffi.} type plus a
`toC()` that builds the matching `C.<Type>` (C.CString for strings, a C array
for seqs, present-flags for options, recursively for nested structs) and
returns cleanup funcs run via defer once the call returns. The native path
deep-copies every argument, so releasing the C buffers immediately is safe.
The C bridge already accepted struct-by-value params via the pass-through type
mapping; only the Go-side conversion and the `allSupported` gate needed work.
Bare seq/Option *top-level* params (not wrapped in a struct) remain skipped, as
the native ABI does not expose them either.
The generated package is now self-contained: the native `<lib>.h` is emitted
beside the `.go`, and the cgo directives use ${SRCDIR} so the header and the
staged library resolve without extra env vars. genbindings_go runs gofmt to
finalize column alignment.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
