Files
SwiftLint/Source/SwiftLintBuiltInRules
JP Simard 5eac9be50d Migrate AccessibilityTraitForButtonRule from SourceKit to SwiftSyntax (#6108)
## Summary

Convert AccessibilityTraitForButtonRule to use SwiftSyntax instead of
SourceKit for improved performance and better accessibility trait
detection in SwiftUI modifier chains.

## Key Technical Improvements

- **Bidirectional modifier chain analysis** for comprehensive
  accessibility trait detection
- **Better context awareness** through SwiftSyntax tree traversal
- **Accurate container exemption logic** for Button/Link components
- **Enhanced gesture detection** supporting `.onTapGesture` and
  `.gesture` modifiers
- **Improved performance** with SwiftSyntax visitor pattern over
  SourceKit AST parsing

## Migration Details

- Replaced `ASTRule` with `@SwiftSyntaxRule(optIn: true)` annotation
- Implemented `ViolationsSyntaxVisitor` pattern for systematic tree
  traversal
- Added bidirectional accessibility trait detection that checks both
  before and after tap gestures
- Enhanced exemption logic for inherently accessible containers
  (Button, NavigationLink)
- Maintained full compatibility with existing rule behavior and test
  cases
2025-06-21 10:11:43 -04:00
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