[fidl][go] Expose unknown handles in unions (1/3)

Ignore unknown data fields in createMarshaler, since the
marshalers created for these fields are unused.

This change avoids the need to create marshalers for these fields,
and also makes it explicit that these fields are not processed as
"data fields" instead of relying on behavior from readOrdinalTag
which happens to allow this to work.

This also prepares for adding the I_unknownHandles field in
fidlgen_go

Test: fx test -v fidl_go_conformance
Change-Id: Ia9d58a05cdfdbe7dd9f0ffa5ebb6ac5f0d5ff200
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/go/+/426296
Reviewed-by: Mitchell Kember <mkember@google.com>
Commit-Queue: Felix Zhu <fcz@google.com>
1 file changed
tree: 8d7645038f11a963f705f5700147aaa4faf5e2ad
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. makefuchsia/
  6. makeroot/
  7. meta/
  8. misc/
  9. src/
  10. test/
  11. .gitattributes
  12. .gitignore
  13. AUTHORS
  14. BUILD.gn
  15. CONTRIBUTING.md
  16. CONTRIBUTORS
  17. favicon.ico
  18. LICENSE
  19. PATENTS
  20. README.md
  21. regen-fidl
  22. regen-syscalls
  23. robots.txt
  24. SECURITY.md
  25. VERSION
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