Traversers

→ LCE traversers are implemented as a modified visitor pattern

• The abstract Traverser base class provides the implementation that orchestrates the execution of the other components
  • only the traverseChildren method that delegates the traversal of potential child nodes to other traversers is abstract and has to be implemented by sub types
• for each AST node type (provided via @typescript-eslint/utils) that should be processed a separate Traverser implementation has to be provided
• all traverser implementations are located under typescript/src/core/traversers
  • all files end with .traverser.ts
  • may export one or more traverser classes each

Notes for creating new traversers:

• each traverser class must inherit from Traverser
• all traversers need to be registered in the TRAVERSERS feature collection in features.ts
  • before implementing a new traverser check if there already exists one in the collection
  • existing traversers may not trigger the traversal for all their child nodes: expand where needed
• use runTraverserForNode(s) utility function to easily delegate the traversal process
• parent property names should be declared as public static readonly members of the implementing class