Function getParentEnvInjector

packages/core/src/debug/ai/di_graph.ts:249–262

Find the parent environment injector of the given injector.

(injector: Injector)

/** Find the parent environment injector of the given injector. */
function getParentEnvInjector(injector: Injector): Injector | undefined {
  if (injector instanceof ChainedInjector) {
    // We skip `chainedInjector.injector` because that points at the parent element injector
    // which is handled by `walkElementInjectors`.
    const chainedInjector = injector;
    return chainedInjector.parentInjector;
  } else if (injector instanceof R3Injector) {
    return injector.parent;
  } else if (injector instanceof NullInjector) {
    return undefined;
  } else {
    throw new Error(`Unknown injector type: "${injector.constructor.name}".`);
  }
}