DAS: Rearrange code to promote variables better

The motivation here was to remove the local duplicate variables,
`isExpression_final` and `binary_final`. This variables only existed
because the variables they duplicate lose their promoted types inside
the `builder.addDartFileEdit` closure. They lose their promoted types
because they are multiply assigned.

This CL extracts the first portion of each `compute()` method, which
is solely concerned with computing the real "target". The diff looks
large because of how that portion is moved into a helper method that
is _below_ the second half of `compute()`.

I think each of these changes then improves readability: extracting
part of a long method into one helper, and avoiding a local duplicate
variable.

Change-Id: I6919b04a39dfc02f3b2f7b74727d3f576c71d37b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/417022
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Samuel Rawlins <srawlins@google.com>
2 files changed
tree: 850abc8a329dd3c0ac356cf9d8880e7b78c178e7
  1. .dart_tool/
  2. .github/
  3. benchmarks/
  4. build/
  5. docs/
  6. pkg/
  7. runtime/
  8. samples/
  9. sdk/
  10. tests/
  11. third_party/
  12. tools/
  13. utils/
  14. .clang-format
  15. .gitattributes
  16. .gitconfig
  17. .gitignore
  18. .gn
  19. .mailmap
  20. .style.yapf
  21. AUTHORS
  22. BUILD.gn
  23. CHANGELOG.md
  24. codereview.settings
  25. CONTRIBUTING.md
  26. DEPS
  27. LICENSE
  28. OWNERS
  29. PATENT_GRANT
  30. PRESUBMIT.py
  31. pubspec.yaml
  32. README.dart-sdk
  33. README.md
  34. sdk.code-workspace
  35. sdk_args.gni
  36. sdk_packages.yaml
  37. SECURITY.md
  38. WATCHLISTS
README.md

Dart

An approachable, portable, and productive language for high-quality apps on any platform

Dart is:

  • Approachable: Develop with a strongly typed programming language that is consistent, concise, and offers modern language features like null safety and patterns.

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  • Productive: Make changes iteratively: use hot reload to see the result instantly in your running app. Diagnose app issues using DevTools.

Dart's flexible compiler technology lets you run Dart code in different ways, depending on your target platform and goals:

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