[libcamera-devel] [PATCH] libcamera: Use C++14 std::*_t type traits

[Laurent Pinchart]

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 at ideasonboard.com>
---
 include/libcamera/bound_method.h |  6 +++---
 include/libcamera/object.h       |  2 +-
 include/libcamera/signal.h       |  4 ++--
 src/libcamera/ipa_module.cpp     | 10 +++++-----
 4 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/include/libcamera/bound_method.h b/include/libcamera/bound_method.h
index 7ffd2e426e18..983bb5cbbad0 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 4d16f3f2b610..9a3dd0702d39 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 c13bb30f0636..ed30eb559127 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
diff --git a/src/libcamera/ipa_module.cpp b/src/libcamera/ipa_module.cpp
index de65525b8319..a01d0757ff8f 100644
--- a/src/libcamera/ipa_module.cpp
+++ b/src/libcamera/ipa_module.cpp
@@ -42,20 +42,20 @@ LOG_DEFINE_CATEGORY(IPAModule)
 namespace {
 
 template<typename T>
-typename std::remove_extent<T>::type *elfPointer(void *map, off_t offset,
-						 size_t fileSize, size_t objSize)
+typename std::remove_extent_t<T> *elfPointer(void *map, off_t offset,
+					     size_t fileSize, size_t objSize)
 {
 	size_t size = offset + objSize;
 	if (size > fileSize || size < objSize)
 		return nullptr;
 
-	return reinterpret_cast<typename std::remove_extent<T>::type *>
+	return reinterpret_cast<typename std::remove_extent_t<T> *>
 		(static_cast<char *>(map) + offset);
 }
 
 template<typename T>
-typename std::remove_extent<T>::type *elfPointer(void *map, off_t offset,
-						 size_t fileSize)
+typename std::remove_extent_t<T> *elfPointer(void *map, off_t offset,
+					     size_t fileSize)
 {
 	return elfPointer<T>(map, offset, fileSize, sizeof(T));
 }
-- 
Regards,

Laurent Pinchart