Consistently have the namespace closing comment

[folly.git] / folly / futures / Promise.h

diff --git a/folly/futures/Promise.h b/folly/futures/Promise.h
index a2793e2966fa1ff528209f735e27e8a61a9cd73c..905ce5dd7eb9a4a1d23864aed407381920ad3728 100644 (file)
--- a/folly/futures/Promise.h
+++ b/folly/futures/Promise.h
@@ -23,11 +23,23 @@
 namespace folly {
 
 // forward declaration
+template <class T>
+class SemiFuture;
 template <class T> class Future;
 
+namespace futures {
+namespace detail {
+struct EmptyConstruct {};
+template <typename T, typename F>
+class CoreCallbackState;
+} // namespace detail
+} // namespace futures
+
 template <class T>
 class Promise {
  public:
+  static Promise<T> makeEmpty() noexcept; // equivalent to moved-from
+
   Promise();
   ~Promise();
 
@@ -97,7 +109,11 @@ class Promise {
 
  private:
   typedef typename Future<T>::corePtr corePtr;
+  template <class>
+  friend class SemiFuture;
   template <class> friend class Future;
+  template <class, class>
+  friend class futures::detail::CoreCallbackState;
 
   // Whether the Future has been retrieved (a one-time operation).
   bool retrieved_;
@@ -105,12 +121,14 @@ class Promise {
   // shared core state object
   corePtr core_;
 
+  explicit Promise(futures::detail::EmptyConstruct) noexcept;
+
   void throwIfFulfilled();
   void throwIfRetrieved();
   void detach();
 };
 
-}
+} // namespace folly
 
 #include <folly/futures/Future.h>
 #include <folly/futures/Promise-inl.h>