Function getUndecoratedInjectableFactory

packages/core/src/di/r3_injector.ts:598–622

(token: Function)

}

function getUndecoratedInjectableFactory(token: Function) {
  // If the token has parameters then it has dependencies that we cannot resolve implicitly.
  const paramLength = token.length;
  if (paramLength > 0) {
    throw new RuntimeError(
      RuntimeErrorCode.INVALID_INJECTION_TOKEN,
      ngDevMode &&
        `Can't resolve all parameters for ${stringify(token)}: (${newArray(paramLength, '?').join(
          ', ',
        )}).`,
    );
  }

  // The constructor function appears to have no parameters.
  // This might be because it inherits from a super-class. In which case, use an injectable
  // def from an ancestor if there is one.
  // Otherwise this really is a simple class with no dependencies, so return a factory that
  // just instantiates the zero-arg constructor.
  const inheritedInjectableDef = getInheritedInjectableDef(token);
  if (inheritedInjectableDef !== null) {
    return () => inheritedInjectableDef.factory(token as Type<any>);
  } else {
    return () => new (token as Type<any>)();
  }
}

function providerToRecord(provider: SingleProvider): Record<any> {
  if (isValueProvider(provider)) {