tryCall<T> function

FutureOr<T?> tryCall<T>(FutureOr<T?> call(), { T? defaultValue, T? onSuccessValue, T? onErrorValue, })

Tries to performa a call.

• If onSuccessValue is defined it overwrites the call returned value.
• If onErrorValue is defined it will be returned in case of error.
• Returns defaultValue if call returns null and onSuccessValue or onErrorValue are null.

Implementation

FutureOr<T?> tryCall<T>(
  FutureOr<T?> Function() call, {
  T? defaultValue,
  T? onSuccessValue,
  T? onErrorValue,
}) {
  try {
    return call().then(
      (ret) => onSuccessValue ?? ret ?? defaultValue,
      onError: (e) => onErrorValue ?? defaultValue,
    );
  } catch (_) {
    return onErrorValue ?? defaultValue;
  }
}