go/types, types2: add the Interface.MarkImplicit method

Add a new interface method, MarkImplicit, to allow marking interfaces as
implicit from outside the type-checker. This is necessary so that we can
capture the implicit bit in export data, and use it from importers.

For #48424
For #49040

Change-Id: I999aba2a298f92432326d7ccbd87fe133a2e1a72
Reviewed-on: https://go-review.googlesource.com/c/go/+/357796
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2 files changed
tree: 6688f1c249ee905e3d6be4726921180507812261
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. AUTHORS
  11. codereview.cfg
  12. CONTRIBUTING.md
  13. CONTRIBUTORS
  14. LICENSE
  15. PATENTS
  16. README.md
  17. SECURITY.md
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