[libcamera-devel] [PATCH 1/2] libcamera: Use helper variable template for type traits
Laurent Pinchart
laurent.pinchart at ideasonboard.com
Mon Oct 26 20:52:08 CET 2020
C++17 introduces helper variable templates for type traits, allowing
shortening std::is_foo<T>::value to std::is_foo_v<T>. Use them through
the code base.
Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
---
include/libcamera/bound_method.h | 2 +-
include/libcamera/controls.h | 12 ++++----
include/libcamera/object.h | 2 +-
include/libcamera/signal.h | 4 +--
include/libcamera/span.h | 48 ++++++++++++++++----------------
5 files changed, 34 insertions(+), 34 deletions(-)
diff --git a/include/libcamera/bound_method.h b/include/libcamera/bound_method.h
index 95a956530877..feac51dac527 100644
--- a/include/libcamera/bound_method.h
+++ b/include/libcamera/bound_method.h
@@ -63,7 +63,7 @@ public:
}
virtual ~BoundMethodBase() = default;
- template<typename T, typename std::enable_if_t<!std::is_same<Object, T>::value> * = nullptr>
+ template<typename T, typename std::enable_if_t<!std::is_same_v<Object, T>> * = nullptr>
bool match(T *obj) { return obj == obj_; }
bool match(Object *object) { return object == object_; }
diff --git a/include/libcamera/controls.h b/include/libcamera/controls.h
index 3b7f3347761e..dc549a92f975 100644
--- a/include/libcamera/controls.h
+++ b/include/libcamera/controls.h
@@ -98,7 +98,7 @@ public:
#ifndef __DOXYGEN__
template<typename T, typename std::enable_if_t<!details::is_span<T>::value &&
details::control_type<T>::value &&
- !std::is_same<std::string, std::remove_cv_t<T>>::value,
+ !std::is_same_v<std::string, std::remove_cv_t<T>>,
std::nullptr_t> = nullptr>
ControlValue(const T &value)
: type_(ControlTypeNone), numElements_(0)
@@ -108,7 +108,7 @@ public:
}
template<typename T, typename std::enable_if_t<details::is_span<T>::value ||
- std::is_same<std::string, std::remove_cv_t<T>>::value,
+ std::is_same_v<std::string, std::remove_cv_t<T>>,
std::nullptr_t> = nullptr>
#else
template<typename T>
@@ -142,7 +142,7 @@ public:
#ifndef __DOXYGEN__
template<typename T, typename std::enable_if_t<!details::is_span<T>::value &&
- !std::is_same<std::string, std::remove_cv_t<T>>::value,
+ !std::is_same_v<std::string, std::remove_cv_t<T>>,
std::nullptr_t> = nullptr>
T get() const
{
@@ -153,7 +153,7 @@ public:
}
template<typename T, typename std::enable_if_t<details::is_span<T>::value ||
- std::is_same<std::string, std::remove_cv_t<T>>::value,
+ std::is_same_v<std::string, std::remove_cv_t<T>>,
std::nullptr_t> = nullptr>
#else
template<typename T>
@@ -170,7 +170,7 @@ public:
#ifndef __DOXYGEN__
template<typename T, typename std::enable_if_t<!details::is_span<T>::value &&
- !std::is_same<std::string, std::remove_cv_t<T>>::value,
+ !std::is_same_v<std::string, std::remove_cv_t<T>>,
std::nullptr_t> = nullptr>
void set(const T &value)
{
@@ -179,7 +179,7 @@ public:
}
template<typename T, typename std::enable_if_t<details::is_span<T>::value ||
- std::is_same<std::string, std::remove_cv_t<T>>::value,
+ std::is_same_v<std::string, std::remove_cv_t<T>>,
std::nullptr_t> = nullptr>
#else
template<typename T>
diff --git a/include/libcamera/object.h b/include/libcamera/object.h
index a1882f05fb77..423208db24bd 100644
--- a/include/libcamera/object.h
+++ b/include/libcamera/object.h
@@ -32,7 +32,7 @@ public:
void postMessage(std::unique_ptr<Message> msg);
template<typename T, typename R, typename... FuncArgs, typename... Args,
- typename std::enable_if_t<std::is_base_of<Object, T>::value> * = nullptr>
+ typename std::enable_if_t<std::is_base_of_v<Object, T>> * = nullptr>
R invokeMethod(R (T::*func)(FuncArgs...), ConnectionType type,
Args... args)
{
diff --git a/include/libcamera/signal.h b/include/libcamera/signal.h
index 5bcd7a77c5f1..46d917d5f582 100644
--- a/include/libcamera/signal.h
+++ b/include/libcamera/signal.h
@@ -44,7 +44,7 @@ public:
}
#ifndef __DOXYGEN__
- template<typename T, typename R, typename std::enable_if_t<std::is_base_of<Object, T>::value> * = nullptr>
+ template<typename T, typename R, typename std::enable_if_t<std::is_base_of_v<Object, T>> * = nullptr>
void connect(T *obj, R (T::*func)(Args...),
ConnectionType type = ConnectionTypeAuto)
{
@@ -52,7 +52,7 @@ public:
SignalBase::connect(new BoundMethodMember<T, void, Args...>(obj, object, func, type));
}
- template<typename T, typename R, typename std::enable_if_t<!std::is_base_of<Object, T>::value> * = nullptr>
+ template<typename T, typename R, typename std::enable_if_t<!std::is_base_of_v<Object, T>> * = nullptr>
#else
template<typename T, typename R>
#endif
diff --git a/include/libcamera/span.h b/include/libcamera/span.h
index 91e9f974cc58..d720adb81f89 100644
--- a/include/libcamera/span.h
+++ b/include/libcamera/span.h
@@ -125,8 +125,8 @@ public:
template<std::size_t N>
constexpr Span(element_type (&arr)[N],
- std::enable_if_t<std::is_convertible<std::remove_pointer_t<decltype(utils::data(arr))> (*)[],
- element_type (*)[]>::value &&
+ std::enable_if_t<std::is_convertible_v<std::remove_pointer_t<decltype(utils::data(arr))> (*)[],
+ element_type (*)[]> &&
N == Extent,
std::nullptr_t> = nullptr) noexcept
: data_(arr)
@@ -135,8 +135,8 @@ public:
template<std::size_t N>
constexpr Span(std::array<value_type, N> &arr,
- std::enable_if_t<std::is_convertible<std::remove_pointer_t<decltype(utils::data(arr))> (*)[],
- element_type (*)[]>::value &&
+ std::enable_if_t<std::is_convertible_v<std::remove_pointer_t<decltype(utils::data(arr))> (*)[],
+ element_type (*)[]> &&
N == Extent,
std::nullptr_t> = nullptr) noexcept
: data_(arr.data())
@@ -145,8 +145,8 @@ public:
template<std::size_t N>
constexpr Span(const std::array<value_type, N> &arr,
- std::enable_if_t<std::is_convertible<std::remove_pointer_t<decltype(utils::data(arr))> (*)[],
- element_type (*)[]>::value &&
+ std::enable_if_t<std::is_convertible_v<std::remove_pointer_t<decltype(utils::data(arr))> (*)[],
+ element_type (*)[]> &&
N == Extent,
std::nullptr_t> = nullptr) noexcept
: data_(arr.data())
@@ -157,9 +157,9 @@ public:
explicit constexpr Span(Container &cont,
std::enable_if_t<!details::is_span<Container>::value &&
!details::is_array<Container>::value &&
- !std::is_array<Container>::value &&
- std::is_convertible<std::remove_pointer_t<decltype(utils::data(cont))> (*)[],
- element_type (*)[]>::value,
+ !std::is_array_v<Container> &&
+ std::is_convertible_v<std::remove_pointer_t<decltype(utils::data(cont))> (*)[],
+ element_type (*)[]>,
std::nullptr_t> = nullptr)
: data_(utils::data(cont))
{
@@ -169,9 +169,9 @@ public:
explicit constexpr Span(const Container &cont,
std::enable_if_t<!details::is_span<Container>::value &&
!details::is_array<Container>::value &&
- !std::is_array<Container>::value &&
- std::is_convertible<std::remove_pointer_t<decltype(utils::data(cont))> (*)[],
- element_type (*)[]>::value,
+ !std::is_array_v<Container> &&
+ std::is_convertible_v<std::remove_pointer_t<decltype(utils::data(cont))> (*)[],
+ element_type (*)[]>,
std::nullptr_t> = nullptr)
: data_(utils::data(cont))
{
@@ -180,7 +180,7 @@ public:
template<class U, std::size_t N>
explicit constexpr Span(const Span<U, N> &s,
- std::enable_if_t<std::is_convertible<U (*)[], element_type (*)[]>::value &&
+ std::enable_if_t<std::is_convertible_v<U (*)[], element_type (*)[]> &&
N == Extent,
std::nullptr_t> = nullptr) noexcept
: data_(s.data())
@@ -293,8 +293,8 @@ public:
template<std::size_t N>
constexpr Span(element_type (&arr)[N],
- std::enable_if_t<std::is_convertible<std::remove_pointer_t<decltype(utils::data(arr))> (*)[],
- element_type (*)[]>::value,
+ std::enable_if_t<std::is_convertible_v<std::remove_pointer_t<decltype(utils::data(arr))> (*)[],
+ element_type (*)[]>,
std::nullptr_t> = nullptr) noexcept
: data_(arr), size_(N)
{
@@ -302,8 +302,8 @@ public:
template<std::size_t N>
constexpr Span(std::array<value_type, N> &arr,
- std::enable_if_t<std::is_convertible<std::remove_pointer_t<decltype(utils::data(arr))> (*)[],
- element_type (*)[]>::value,
+ std::enable_if_t<std::is_convertible_v<std::remove_pointer_t<decltype(utils::data(arr))> (*)[],
+ element_type (*)[]>,
std::nullptr_t> = nullptr) noexcept
: data_(utils::data(arr)), size_(N)
{
@@ -319,9 +319,9 @@ public:
constexpr Span(Container &cont,
std::enable_if_t<!details::is_span<Container>::value &&
!details::is_array<Container>::value &&
- !std::is_array<Container>::value &&
- std::is_convertible<std::remove_pointer_t<decltype(utils::data(cont))> (*)[],
- element_type (*)[]>::value,
+ !std::is_array_v<Container> &&
+ std::is_convertible_v<std::remove_pointer_t<decltype(utils::data(cont))> (*)[],
+ element_type (*)[]>,
std::nullptr_t> = nullptr)
: data_(utils::data(cont)), size_(utils::size(cont))
{
@@ -331,9 +331,9 @@ public:
constexpr Span(const Container &cont,
std::enable_if_t<!details::is_span<Container>::value &&
!details::is_array<Container>::value &&
- !std::is_array<Container>::value &&
- std::is_convertible<std::remove_pointer_t<decltype(utils::data(cont))> (*)[],
- element_type (*)[]>::value,
+ !std::is_array_v<Container> &&
+ std::is_convertible_v<std::remove_pointer_t<decltype(utils::data(cont))> (*)[],
+ element_type (*)[]>,
std::nullptr_t> = nullptr)
: data_(utils::data(cont)), size_(utils::size(cont))
{
@@ -341,7 +341,7 @@ public:
template<class U, std::size_t N>
constexpr Span(const Span<U, N> &s,
- std::enable_if_t<std::is_convertible<U (*)[], element_type (*)[]>::value,
+ std::enable_if_t<std::is_convertible_v<U (*)[], element_type (*)[]>,
std::nullptr_t> = nullptr) noexcept
: data_(s.data()), size_(s.size())
{
--
Regards,
Laurent Pinchart
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