[dev.typeparams] cmd/compile: simplify writer.collectDecls

The previous code for walking the syntax AST to find declarations
needed to know whether a declaration appeared within block scope, but
syntax.Crawl (née syntax.Walk) made that somewhat awkward.

This CL simplifies it a little, taking advantage of syntax.Walk's
support for keeping per-subtree state.

Change-Id: I03c7da8c44bec40f88e983852dc6bbab7e6ac13c
Reviewed-on: https://go-review.googlesource.com/c/go/+/330549
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
1 file changed
tree: db2700f9ad12a0a889f09eaad6cffc1aa571c5fa
  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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