Fix concurrent class. Only works with gcc 4.7. Broken in clang 3.2 and

gcc 4.8.

Author: juanchopanza

Concurrency/ConcurrentWrapper2/Concurrent.h

@@ -68,6 +68,14 @@ class Concurrent
     worker_.join();
   }
 
+ private:
+
+  mutable Queue<std::function<void()>> queue_;
+  mutable T resource_;
+  std::thread worker_;
+  bool done_;
+
+ public:
   template <typename F>
   auto operator()(F f) const -> std::future<decltype(f(resource_))>
   {
@@ -81,11 +89,5 @@ class Concurrent
     return fut;
   }
 
- private:
-
-  mutable Queue<std::function<void()>> queue_;
-  mutable T resource_;
-  std::thread worker_;
-  bool done_;
 
 };

Concurrency/ConcurrentWrapper2/concurrent_vector.cpp

@@ -15,12 +15,29 @@ std::ostream& operator<<(std::ostream& os, const std::vector<T>& v)
 
 int main()
 {
-  Concurrent<std::vector<int>> cv{{1, 2, 3, 4, 5, 6}};
-
+  Concurrent<std::vector<int>> cv{std::vector<int>(10)};
   auto f1 = cv([](std::vector<int>& v){
                  return std::accumulate(v.begin(), v.end(), 0);
                });
+
+  auto f2 = cv([](std::vector<int>& v)->bool{
+                 std::iota(v.begin(), v.end(), 0);
+                 return true;
+               });
+  auto f3 = cv([](std::vector<int>& v){
+                 return std::accumulate(v.begin(), v.end(), 0);
+               });
+
+  auto f4 = cv([](std::vector<int>& v){
+                 return v.size();
+               });
+
+  std::cout << std::boolalpha;
   std::cout << f1.get() << std::endl;
+  std::cout << f2.get() << std::endl;
+  std::cout << f3.get() << std::endl;
+  std::cout << f4.get() << std::endl;
+
 
 }