Add missing system includes

Main culprits:
- std::size_t, std::nullptr_t, and NULL require <cstddef>
- std::move and std::forward require <utility>
- unordered maps and sets require respective includes
- std::for_each and std::all_of require <algorithm>

6 files changed, 9 insertions, 0 deletions

diff --git a/src/buildtool/multithreading/async_map.hpp b/src/buildtool/multithreading/async_map.hpp
index 3267b312..41e7dded 100644
--- a/src/buildtool/multithreading/async_map.hpp
+++ b/src/buildtool/multithreading/async_map.hpp
@@ -15,6 +15,7 @@
 #ifndef INCLUDED_SRC_BUILDTOOL_MULTITHREADING_ASYNC_MAP_HPP
 #define INCLUDED_SRC_BUILDTOOL_MULTITHREADING_ASYNC_MAP_HPP
 
+#include <cstddef>
 #include <memory>
 #include <mutex>  // unique_lock
 #include <shared_mutex>
diff --git a/src/buildtool/multithreading/async_map_consumer.hpp b/src/buildtool/multithreading/async_map_consumer.hpp
index 0de6b36f..bc7f33ac 100644
--- a/src/buildtool/multithreading/async_map_consumer.hpp
+++ b/src/buildtool/multithreading/async_map_consumer.hpp
@@ -17,12 +17,14 @@
 
 #include <atomic>
 #include <condition_variable>
+#include <cstddef>
 #include <functional>
 #include <mutex>
 #include <shared_mutex>
 #include <thread>
 #include <unordered_map>
 #include <unordered_set>
+#include <utility>  // std::move
 #include <vector>
 
 #include "gsl/gsl"
diff --git a/src/buildtool/multithreading/async_map_node.hpp b/src/buildtool/multithreading/async_map_node.hpp
index 2c07f11b..15687344 100644
--- a/src/buildtool/multithreading/async_map_node.hpp
+++ b/src/buildtool/multithreading/async_map_node.hpp
@@ -18,6 +18,7 @@
 #include <atomic>
 #include <mutex>
 #include <optional>
+#include <utility>  // std::move
 
 #include "gsl/gsl"
 #include "src/buildtool/multithreading/task.hpp"
diff --git a/src/buildtool/multithreading/notification_queue.hpp b/src/buildtool/multithreading/notification_queue.hpp
index 9d2f06eb..f84e47c6 100644
--- a/src/buildtool/multithreading/notification_queue.hpp
+++ b/src/buildtool/multithreading/notification_queue.hpp
@@ -15,7 +15,9 @@
 #ifndef INCLUDED_SRC_BUILDTOOL_MULTITHREADING_NOTIFICATION_QUEUE_HPP
 #define INCLUDED_SRC_BUILDTOOL_MULTITHREADING_NOTIFICATION_QUEUE_HPP
 
+#include <atomic>
 #include <condition_variable>
+#include <cstddef>
 #include <deque>
 #include <mutex>
 #include <optional>
diff --git a/src/buildtool/multithreading/task.hpp b/src/buildtool/multithreading/task.hpp
index f1661b92..a8c4591e 100644
--- a/src/buildtool/multithreading/task.hpp
+++ b/src/buildtool/multithreading/task.hpp
@@ -17,6 +17,7 @@
 
 #include <functional>
 #include <type_traits>
+#include <utility>  // std::move
 
 class Task {
   public:
diff --git a/src/buildtool/multithreading/task_system.hpp b/src/buildtool/multithreading/task_system.hpp
index 58d2352d..089dc3d8 100644
--- a/src/buildtool/multithreading/task_system.hpp
+++ b/src/buildtool/multithreading/task_system.hpp
@@ -17,7 +17,9 @@
 
 #include <algorithm>
 #include <atomic>
+#include <cstddef>
 #include <thread>
+#include <utility>  // std::forward
 #include <vector>
 
 #include "src/buildtool/multithreading/notification_queue.hpp"