Function findExpressionInNode

packages/compiler/test/render3/view/util.ts:106–119

(node: a.Node, expr: string)

}

function findExpressionInNode(node: a.Node, expr: string): e.AST | null {
  if (node instanceof a.Element || node instanceof a.Template || node instanceof a.Component) {
    return findExpression([...node.inputs, ...node.outputs, ...node.children], expr);
  } else if (node instanceof a.Directive) {
    return findExpression([...node.inputs, ...node.outputs], expr);
  } else if (node instanceof a.BoundAttribute || node instanceof a.BoundText) {
    const ts = toStringExpression(node.value);
    return ts === expr ? node.value : null;
  } else if (node instanceof a.BoundEvent) {
    return toStringExpression(node.handler) === expr ? node.handler : null;
  } else {
    return null;
  }
}

export function toStringExpression(expr: e.AST): string {
  while (expr instanceof e.ASTWithSource) {