Make QCryptographicHash move constructible

This adds a move constructor, a move assignment operator and a swap
function to QCryptographicHash. This can (to name one example) be useful
when you want to store multiple hashes in a vector.

[ChangeLog][QtCore][QCryptographicHash] Added move constructor, move
assignment operator and swap() function.

Change-Id: Id54594fa69104ec25ad78581f962a021e85531c2
Reviewed-by: Marc Mutz <marc.mutz@qt.io>

2 files changed, 37 insertions, 0 deletions

diff --git a/src/corelib/tools/qcryptographichash.cpp b/src/corelib/tools/qcryptographichash.cpp
index 8d60be175e..3f6075f2aa 100644
--- a/src/corelib/tools/qcryptographichash.cpp
+++ b/src/corelib/tools/qcryptographichash.cpp
@@ -316,6 +316,18 @@ QCryptographicHash::QCryptographicHash(Algorithm method)
 }
 
 /*!
+    \fn QCryptographicHash::QCryptographicHash(QCryptographicHash &&other)
+
+    Move-constructs a new QCryptographicHash from \a other.
+
+    \note The moved-from object \a other is placed in a
+    partially-formed state, in which the only valid operations are
+    destruction and assignment of a new value.
+
+    \since 6.5
+*/
+
+/*!
   Destroys the object.
 */
 QCryptographicHash::~QCryptographicHash()
@@ -324,6 +336,27 @@ QCryptographicHash::~QCryptographicHash()
 }
 
 /*!
+    \fn QCryptographicHash &QCryptographicHash::operator=(QCryptographicHash &&other)
+
+    Move-assigns \a other to this QCryptographicHash instance.
+
+    \note The moved-from object \a other is placed in a
+    partially-formed state, in which the only valid operations are
+    destruction and assignment of a new value.
+
+    \since 6.5
+*/
+
+/*!
+    \fn void QCryptographicHash::swap(QCryptographicHash &other)
+
+    Swaps cryptographic hash \a other with this cryptographic hash. This
+    operation is very fast and never fails.
+
+    \since 6.5
+*/
+
+/*!
   Resets the object.
 */
 void QCryptographicHash::reset() noexcept
diff --git a/src/corelib/tools/qcryptographichash.h b/src/corelib/tools/qcryptographichash.h
index f5710015cf..94fc82783b 100644
--- a/src/corelib/tools/qcryptographichash.h
+++ b/src/corelib/tools/qcryptographichash.h
@@ -64,8 +64,12 @@ public:
     Q_ENUM(Algorithm)
 
     explicit QCryptographicHash(Algorithm method);
+    QCryptographicHash(QCryptographicHash &&other) noexcept : d(std::exchange(other.d, nullptr)) {}
     ~QCryptographicHash();
 
+    QT_MOVE_ASSIGNMENT_OPERATOR_IMPL_VIA_MOVE_AND_SWAP(QCryptographicHash)
+    void swap(QCryptographicHash &other) noexcept { qt_ptr_swap(d, other.d); }
+
     void reset() noexcept;
 
 #if QT_DEPRECATED_SINCE(6, 4)