Define move-assignment and delete copy-assignment operators for xbt::Task.

diff --git a/include/xbt/functional.hpp b/include/xbt/functional.hpp
index 608d372..9ca66f8 100644 (file)
--- a/include/xbt/functional.hpp
+++ b/include/xbt/functional.hpp
@@ -175,7 +175,8 @@ public:
     vtable_ = that.vtable_;
     that.vtable_ = nullptr;
   }
     vtable_ = that.vtable_;
     that.vtable_ = nullptr;
   }

-  Task& operator=(Task that)
+  Task& operator=(Task const& that) = delete;
+  Task& operator=(Task&& that)

   {
     this->clear();
     if (that.vtable_ && that.vtable_->move)
   {
     this->clear();
     if (that.vtable_ && that.vtable_->move)