Move declaration, and keep #include at th top of the file (sonar).

[simgrid.git] / include / xbt / functional.hpp

diff --git a/include/xbt/functional.hpp b/include/xbt/functional.hpp
index 608d372..145e461 100644 (file)
--- a/include/xbt/functional.hpp
+++ b/include/xbt/functional.hpp
@@ -1,4 +1,4 @@
-/* Copyright (c) 2015-2019. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2015-2020. The SimGrid Team. All rights reserved.          */
 
 /* This program is free software; you can redistribute it and/or modify it
  * under the terms of the license (GNU LGPL) which comes with this package. */
@@ -27,7 +27,6 @@ namespace simgrid {
 namespace xbt {
 
 template <class F> class MainFunction {
-private:
   F code_;
   std::shared_ptr<const std::vector<std::string>> args_;
 
@@ -109,8 +108,6 @@ template<class T> class Task;
  */
 template<class R, class... Args>
 class Task<R(Args...)> {
-private:
-
   // Placeholder for some class type:
   struct whatever {};
 
@@ -165,30 +162,29 @@ public:
 
   Task(Task const&) = delete;
 
-  Task(Task&& that)
+  Task(Task&& that) noexcept
   {
     if (that.vtable_ && that.vtable_->move)
       that.vtable_->move(buffer_, that.buffer_);
     else
       std::memcpy(static_cast<void*>(&buffer_), static_cast<void*>(&that.buffer_), sizeof(buffer_));
-
-    vtable_ = that.vtable_;
+    vtable_      = std::move(that.vtable_);
     that.vtable_ = nullptr;
   }
-  Task& operator=(Task that)
+  Task& operator=(Task const& that) = delete;
+  Task& operator=(Task&& that) noexcept
   {
     this->clear();
     if (that.vtable_ && that.vtable_->move)
       that.vtable_->move(buffer_, that.buffer_);
     else
       std::memcpy(static_cast<void*>(&buffer_), static_cast<void*>(&that.buffer_), sizeof(buffer_));
-    vtable_ = that.vtable_;
+    vtable_      = std::move(that.vtable_);
     that.vtable_ = nullptr;
     return *this;
   }
 
 private:
-
   template<class F>
   typename std::enable_if<canSBO<F>()>::type
   init(F code)
@@ -199,6 +195,7 @@ private:
         F* src = reinterpret_cast<F*>(&buffer);
         F code = std::move(*src);
         src->~F();
+        // NOTE: std::forward<Args>(args)... is correct.
         return code(std::forward<Args>(args)...);
       },
       // Destroy:
@@ -227,6 +224,7 @@ private:
       [](TaskUnion& buffer, Args... args) {
         // Delete F when we go out of scope:
         std::unique_ptr<F> code(*reinterpret_cast<F**>(&buffer));
+        // NOTE: std::forward<Args>(args)... is correct.
         return (*code)(std::forward<Args>(args)...);
       },
       // Destroy:
@@ -253,13 +251,14 @@ public:
       throw std::bad_function_call();
     const TaskVtable* vtable = vtable_;
     vtable_ = nullptr;
+    // NOTE: std::forward<Args>(args)... is correct.
+    // see C++ [func.wrap.func.inv] for an example
     return vtable->call(buffer_, std::forward<Args>(args)...);
   }
 };
 
 template<class F, class... Args>
 class TaskImpl {
-private:
   F code_;
   std::tuple<Args...> args_;
   typedef decltype(simgrid::xbt::apply(std::move(code_), std::move(args_))) result_type;
@@ -280,15 +279,6 @@ template <class F, class... Args> auto make_task(F code, Args... args) -> Task<d
   return Task<decltype(code(std::move(args)...))()>(std::move(task));
 }
 
-// Deprecated
-template <class F, class... Args>
-XBT_ATTRIB_DEPRECATED_v323("Please use make_task()") auto makeTask(F code, Args... args)
-    -> Task<decltype(code(std::move(args)...))()>
-{
-  TaskImpl<F, Args...> task(std::move(code), std::make_tuple(std::move(args)...));
-  return Task<decltype(code(std::move(args)...))()>(std::move(task));
-}
-
 } // namespace xbt
 } // namespace simgrid
 #endif