Simplify creating QCFTypes from CFTypeRefs

Instead of forcing the user to cast:

  QCFType<CFFooRef> foo = (CFFooRef)CFFunctionReturningCFTypeRef());

We can do it for them, since we already know the expected type:

  auto foo = QCFType<CFFooRef>(CFFunctionReturningCFTypeRef));

Change-Id: I994d5d6530f220288b4bfd6ab16eae9f159ce3ef
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

1 files changed, 4 insertions, 1 deletions

diff --git a/src/corelib/kernel/qcore_mac_p.h b/src/corelib/kernel/qcore_mac_p.h
index d03e2f3738..535d3579b2 100644
--- a/src/corelib/kernel/qcore_mac_p.h
+++ b/src/corelib/kernel/qcore_mac_p.h
@@ -137,8 +137,10 @@ private:
 template <typename T>
 class QCFType : public QAppleRefCounted<T, CFTypeRef, CFRetain, CFRelease>
 {
+    using Base = QAppleRefCounted<T, CFTypeRef, CFRetain, CFRelease>;
 public:
-    using QAppleRefCounted<T, CFTypeRef, CFRetain, CFRelease>::QAppleRefCounted;
+    using Base::Base;
+    explicit QCFType(CFTypeRef r) : Base(static_cast<T>(r)) {}
     template <typename X> X as() const { return reinterpret_cast<X>(this->value); }
     static QCFType constructFromGet(const T &t)
     {
@@ -151,6 +153,7 @@ public:
 class Q_CORE_EXPORT QCFString : public QCFType<CFStringRef>
 {
 public:
+    using QCFType<CFStringRef>::QCFType;
     inline QCFString(const QString &str) : QCFType<CFStringRef>(0), string(str) {}
     inline QCFString(const CFStringRef cfstr = 0) : QCFType<CFStringRef>(cfstr) {}
     inline QCFString(const QCFType<CFStringRef> &other) : QCFType<CFStringRef>(other) {}