libcamera: Use C++14 std::*_t type traits

C++14 introduced useful type traits helpers named std::*_t as aliases to
std::*<...>::type. Use them to simplify the code.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

3 files changed, 6 insertions, 6 deletions

diff --git a/include/libcamera/bound_method.h b/include/libcamera/bound_method.h
index 7ffd2e42..983bb5cb 100644
--- a/include/libcamera/bound_method.h
+++ b/include/libcamera/bound_method.h
@@ -38,7 +38,7 @@ public:
 	{
 	}
 
-	std::tuple<typename std::remove_reference<Args>::type...> args_;
+	std::tuple<typename std::remove_reference_t<Args>...> args_;
 	R ret_;
 };
 
@@ -51,7 +51,7 @@ public:
 	{
 	}
 
-	std::tuple<typename std::remove_reference<Args>::type...> args_;
+	std::tuple<typename std::remove_reference_t<Args>...> args_;
 };
 
 class BoundMethodBase
@@ -63,7 +63,7 @@ public:
 	}
 	virtual ~BoundMethodBase() {}
 
-	template<typename T, typename std::enable_if<!std::is_same<Object, T>::value>::type * = nullptr>
+	template<typename T, typename std::enable_if_t<!std::is_same<Object, T>::value> * = nullptr>
 	bool match(T *obj) { return obj == obj_; }
 	bool match(Object *object) { return object == object_; }
 
diff --git a/include/libcamera/object.h b/include/libcamera/object.h
index 4d16f3f2..9a3dd070 100644
--- a/include/libcamera/object.h
+++ b/include/libcamera/object.h
@@ -30,7 +30,7 @@ public:
 	void postMessage(std::unique_ptr<Message> msg);
 
 	template<typename T, typename R, typename... FuncArgs, typename... Args,
-		 typename std::enable_if<std::is_base_of<Object, T>::value>::type * = nullptr>
+		 typename std::enable_if_t<std::is_base_of<Object, T>::value> * = nullptr>
 	R invokeMethod(R (T::*func)(FuncArgs...), ConnectionType type,
 		       Args... args)
 	{
diff --git a/include/libcamera/signal.h b/include/libcamera/signal.h
index c13bb30f..ed30eb55 100644
--- a/include/libcamera/signal.h
+++ b/include/libcamera/signal.h
@@ -45,7 +45,7 @@ public:
 	}
 
 #ifndef __DOXYGEN__
-	template<typename T, typename R, typename std::enable_if<std::is_base_of<Object, T>::value>::type * = nullptr>
+	template<typename T, typename R, typename std::enable_if_t<std::is_base_of<Object, T>::value> * = nullptr>
 	void connect(T *obj, R (T::*func)(Args...),
 		     ConnectionType type = ConnectionTypeAuto)
 	{
@@ -53,7 +53,7 @@ public:
 		SignalBase::connect(new BoundMethodMember<T, void, Args...>(obj, object, func, type));
 	}
 
-	template<typename T, typename R, typename std::enable_if<!std::is_base_of<Object, T>::value>::type * = nullptr>
+	template<typename T, typename R, typename std::enable_if_t<!std::is_base_of<Object, T>::value> * = nullptr>
 #else
 	template<typename T, typename R>
 #endif