Add qHash(QStringView)

[ChangeLog][QtCore] Added qHash(QStringView).

Change-Id: I69c9203cf301fe586e924168381884aab2e19e5c
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
Reviewed-by: Anton Kudryavtsev <antkudr@mail.ru>

2 files changed, 18 insertions, 1 deletions

diff --git a/src/corelib/tools/qhash.cpp b/src/corelib/tools/qhash.cpp
index 2d97414577..f83643e90a 100644
--- a/src/corelib/tools/qhash.cpp
+++ b/src/corelib/tools/qhash.cpp
@@ -235,6 +235,7 @@ uint qHash(const QByteArray &key, uint seed) Q_DECL_NOTHROW
     return hash(reinterpret_cast<const uchar *>(key.constData()), size_t(key.size()), seed);
 }
 
+#if QT_STRINGVIEW_LEVEL < 2
 uint qHash(const QString &key, uint seed) Q_DECL_NOTHROW
 {
     return hash(key.unicode(), size_t(key.size()), seed);
@@ -244,6 +245,12 @@ uint qHash(const QStringRef &key, uint seed) Q_DECL_NOTHROW
 {
     return hash(key.unicode(), size_t(key.size()), seed);
 }
+#endif
+
+uint qHash(QStringView key, uint seed) Q_DECL_NOTHROW
+{
+    return hash(key.data(), key.size(), seed);
+}
 
 uint qHash(const QBitArray &bitArray, uint seed) Q_DECL_NOTHROW
 {
@@ -1023,6 +1030,13 @@ uint qHash(long double key, uint seed) Q_DECL_NOTHROW
     Returns the hash value for the \a key, using \a seed to seed the calculation.
 */
 
+/*! \fn uint qHash(QStringView key, uint seed = 0)
+    \relates QStringView
+    \since 5.10
+
+    Returns the hash value for the \a key, using \a seed to seed the calculation.
+*/
+
 /*! \fn uint qHash(QLatin1String key, uint seed = 0)
     \relates QHash
     \since 5.0
diff --git a/src/corelib/tools/qhashfunctions.h b/src/corelib/tools/qhashfunctions.h
index 6c27120823..2c3abe6af0 100644
--- a/src/corelib/tools/qhashfunctions.h
+++ b/src/corelib/tools/qhashfunctions.h
@@ -41,7 +41,7 @@
 #ifndef QHASHFUNCTIONS_H
 #define QHASHFUNCTIONS_H
 
-#include <QtCore/qchar.h>
+#include <QtCore/qstring.h>
 #include <QtCore/qpair.h>
 
 #include <numeric> // for std::accumulate
@@ -95,8 +95,11 @@ Q_CORE_EXPORT Q_DECL_CONST_FUNCTION uint qHash(long double key, uint seed = 0) Q
 #endif
 Q_DECL_CONST_FUNCTION Q_DECL_CONSTEXPR inline uint qHash(const QChar key, uint seed = 0) Q_DECL_NOTHROW { return qHash(key.unicode(), seed); }
 Q_CORE_EXPORT Q_DECL_PURE_FUNCTION uint qHash(const QByteArray &key, uint seed = 0) Q_DECL_NOTHROW;
+#if QT_STRINGVIEW_LEVEL < 2
 Q_CORE_EXPORT Q_DECL_PURE_FUNCTION uint qHash(const QString &key, uint seed = 0) Q_DECL_NOTHROW;
 Q_CORE_EXPORT Q_DECL_PURE_FUNCTION uint qHash(const QStringRef &key, uint seed = 0) Q_DECL_NOTHROW;
+#endif
+Q_CORE_EXPORT Q_DECL_PURE_FUNCTION uint qHash(QStringView key, uint seed = 0) Q_DECL_NOTHROW;
 Q_CORE_EXPORT Q_DECL_PURE_FUNCTION uint qHash(const QBitArray &key, uint seed = 0) Q_DECL_NOTHROW;
 Q_CORE_EXPORT Q_DECL_PURE_FUNCTION uint qHash(QLatin1String key, uint seed = 0) Q_DECL_NOTHROW;
 Q_CORE_EXPORT Q_DECL_PURE_FUNCTION uint qt_hash(QStringView key) Q_DECL_NOTHROW;