Migrate to analyzer element2 model

[davidmorgan]

For #1265.

This edits pubspec+CHANGELOG as if there will be a dev release, but I don't think we actually need to release it, I think the actual build 3.0.0 release will be this week or early next week.

Summary by CodeRabbit

• New Features

  • Updated compatibility to support the latest Dart analyzer element2 API, ensuring continued functionality with future Dart SDKs.

• Bug Fixes

  • Improved internal handling of code generation and type resolution by migrating to the new analyzer APIs, reducing potential for incompatibility issues.

• Chores

  • Upgraded dependencies to development versions, including build, source_gen, and json_serializable.
  • Updated test suite to align with the new analyzer element2 API and maintain test coverage.

[coderabbitai]

Walkthrough

This update migrates the Freezed codebase and tests from the Dart analyzer's legacy element API to the new element2 API. All relevant imports, type usages, and property accesses are updated accordingly. The package version and dependencies are incremented to development releases compatible with the new analyzer API. No changes to the overall logic or control flow are introduced.

Changes

File(s) / Group	Change Summary
pubspec.yaml, CHANGELOG.md	Bump version to 3.2.0-dev; update dependencies (build, source_gen, json_serializable, build_test) to dev/major versions supporting analyzer element2 API.
lib/src/ast.dart, lib/src/models.dart, lib/src/parse_generator.dart, lib/src/templates/concrete_template.dart, lib/src/templates/parameter_template.dart, lib/src/templates/properties.dart, lib/src/templates/prototypes.dart, lib/src/tools/imports.dart, lib/src/tools/recursive_import_locator.dart, lib/src/tools/type.dart	Migrate all imports, types, and property accesses from element.dart to element2.dart. Update all analyzer element usages (e.g., Element → Element2, .name → .name3, .fields → .fields2, .metadata → .metadata2.annotations, etc.). Update method and extension signatures to use new types. Add null safety where required. No changes to logic or control flow.
lib/src/parse_generator.dart, lib/src/templates/concrete_template.dart, lib/src/templates/parameter_template.dart, lib/src/templates/properties.dart, lib/src/templates/prototypes.dart, lib/src/tools/imports.dart, lib/src/tools/recursive_import_locator.dart, lib/src/tools/type.dart	Update function/extension signatures and class fields to use element2 types (e.g., Element2, LibraryElement2, FormalParameterElement, etc.).
test/bidirectional_test.dart, test/common_types_test.dart, test/decorator_test.dart, test/deep_copy_test.dart, test/generic_test.dart, test/generics_refs_test.dart, test/json_test.dart, test/multiple_constructors_test.dart, test/optional_maybe_test.dart, test/single_class_constructor_test.dart, test/typedef_parameter_test.dart	Update test code to use element2 API: change imports, update type references, and property/method accesses (e.g., element.source → element.firstFragment.source, ClassElement → ClassElement2, etc.). No changes to test logic or assertions.

Sequence Diagram(s)

sequenceDiagram
    participant User
    participant FreezedGenerator
    participant AnalyzerElement2

    User->>FreezedGenerator: Run code generation
    FreezedGenerator->>AnalyzerElement2: Query class, constructor, field, and type info (element2 API)
    AnalyzerElement2-->>FreezedGenerator: Return element2-based metadata
    FreezedGenerator-->>User: Output generated code (unchanged logic, new API)

Loading

Suggested reviewers

• rrousselGit

Poem

A hop and a skip, through element lands,
We trade old for new with gentle hands.
From .name to .name3, the changes abound,
With element2 magic, new methods are found!
The code still runs true, the tests all agree—
Freezed is now future-proof, as happy as can be!
🐇✨

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Reviewing files that changed from the base of the PR and between cd335da and 32b29eb.

📒 Files selected for processing (1)

• packages/freezed/pubspec.yaml (1 hunks)

🚧 Files skipped from review as they are similar to previous changes (1)

• packages/freezed/pubspec.yaml

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• GitHub Check: freezed (packages/freezed, stable, get)

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[rrousselGit]

LGTM thanks :)

[rrousselGit]

Ping me when a stable version of the packages is available. I'd rather not merge before then.

[CodeDoctorDE]

stable version is out: https://pub.dev/packages/build/changelog

[davidmorgan]

@rrousselGit pubspec updated to remove -dev, looking good :)

[rrousselGit]

Thanks!