Run clang-format

source/listing_8.4.cpp

@@ -1,44 +1,42 @@
-template<typename Iterator,typename T>
-T parallel_accumulate(Iterator first,Iterator last,T init)
+template <typename Iterator, typename T>
+T
+parallel_accumulate(Iterator first, Iterator last, T init)
 {
-    unsigned long const length=std::distance(first,last);
+  unsigned long const length = std::distance(first, last);
 
-    if(!length)
-        return init;
+  if (!length)
+    return init;
 
-    unsigned long const min_per_thread=25;
-    unsigned long const max_threads=
-        (length+min_per_thread-1)/min_per_thread;
+  unsigned long const min_per_thread = 25;
+  unsigned long const max_threads =
+      (length + min_per_thread - 1) / min_per_thread;
 
-    unsigned long const hardware_threads=
-        std::thread::hardware_concurrency();
+  unsigned long const hardware_threads = std::thread::hardware_concurrency();
 
-    unsigned long const num_threads=
-        std::min(hardware_threads!=0?hardware_threads:2,max_threads);
+  unsigned long const num_threads =
+      std::min(hardware_threads != 0 ? hardware_threads : 2, max_threads);
 
-    unsigned long const block_size=length/num_threads;
+  unsigned long const block_size = length / num_threads;
 
-    std::vector<std::future<T> > futures(num_threads-1);
-    std::vector<std::thread> threads(num_threads-1);
-    join_threads joiner(threads);
+  std::vector<std::future<T>> futures(num_threads - 1);
+  std::vector<std::thread> threads(num_threads - 1);
+  join_threads joiner(threads);
 
-    Iterator block_start=first;
-    for(unsigned long i=0;i<(num_threads-1);++i)
-    {
-        Iterator block_end=block_start;
-        std::advance(block_end,block_size);
-        std::packaged_task<T(Iterator,Iterator)> task(
-            accumulate_block<Iterator,T>());
-        futures[i]=task.get_future();
-        threads[i]=std::thread(std::move(task),block_start,block_end);
-        block_start=block_end;
-    }
-    T last_result=accumulate_block()(block_start,last);
-    T result=init;
-    for(unsigned long i=0;i<(num_threads-1);++i)
-    {
-        result+=futures[i].get();
-    }
-    result += last_result;
-    return result;
+  Iterator block_start = first;
+  for (unsigned long i = 0; i < (num_threads - 1); ++i) {
+    Iterator block_end = block_start;
+    std::advance(block_end, block_size);
+    std::packaged_task<T(Iterator, Iterator)> task(
+        accumulate_block<Iterator, T>());
+    futures[i]  = task.get_future();
+    threads[i]  = std::thread(std::move(task), block_start, block_end);
+    block_start = block_end;
+  }
+  T last_result = accumulate_block()(block_start, last);
+  T result      = init;
+  for (unsigned long i = 0; i < (num_threads - 1); ++i) {
+    result += futures[i].get();
+  }
+  result += last_result;
+  return result;
 }