Function visitNode

tools/tslint/noImplicitOverrideAbstractRule.ts:38–54

* For a TypeScript AST node and each of its child nodes, check whether the node is a class * element which implements an abstract member but does not have the `override` keyword.

(node: ts.Node, ctx: WalkContext, program: ts.Program)

 * element which implements an abstract member but does not have the `override` keyword.
 */
function visitNode(node: ts.Node, ctx: WalkContext, program: ts.Program) {
  // If a class element implements an abstract member but does not have the
  // `override` keyword, create a lint failure.
  if (
    ts.isClassElement(node) &&
    !hasOverrideModifier(node) &&
    matchesParentAbstractElement(node, program)
  ) {
    ctx.addFailureAtNode(
      node,
      FAILURE_MESSAGE,
      Replacement.appendText(node.getStart(), `override `),
    );
  }

  ts.forEachChild(node, (n) => visitNode(n, ctx, program));
}

/**
 * Checks if the specified class element matches a parent abstract class element. i.e.