Method provider

java/dagger/internal/SingleCheck.java:59–65

(P provider)

  // This method is declared this way instead of "<T> Provider<T> provider(Provider<T> provider)" 
  // to work around an Eclipse type inference bug: https://github.com/google/dagger/issues/949.
  public static <P extends Provider<T>, T> Provider<T> provider(P provider) {
    // If a scoped @Binds delegates to a scoped binding, don't cache the value again.
    if (provider instanceof SingleCheck || provider instanceof DoubleCheck) {
      return provider;
    }
    return new SingleCheck<T>(checkNotNull(provider));
  }
}