From f9063758cb0140f10fb304a635551859039a569e Mon Sep 17 00:00:00 2001
From: Marc Mutz <marc.mutz@kdab.com>
Date: Wed, 8 Apr 2015 19:45:45 +0200
Subject: Add qHash(QUrlQuery)

QUrlQueries can be compared for equality, so qHash should be overloaded, too.

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

Change-Id: I626258a938359b49a0cae02012b6cba5ef1fe784
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
---
 src/corelib/io/qurlquery.cpp | 21 +++++++++++++++++++++
 src/corelib/io/qurlquery.h   |  3 +++
 2 files changed, 24 insertions(+)

(limited to 'src/corelib')

diff --git a/src/corelib/io/qurlquery.cpp b/src/corelib/io/qurlquery.cpp
index 77d1ab3e24..91e6e21e20 100644
--- a/src/corelib/io/qurlquery.cpp
+++ b/src/corelib/io/qurlquery.cpp
@@ -34,6 +34,7 @@
 #include "qurlquery.h"
 #include "qurl_p.h"
 
+#include <QtCore/qhashfunctions.h>
 #include <QtCore/qstringlist.h>
 
 QT_BEGIN_NAMESPACE
@@ -407,12 +408,32 @@ bool QUrlQuery::operator ==(const QUrlQuery &other) const
     if (d == other.d)
         return true;
     if (d && other.d)
+        // keep in sync with qHash(QUrlQuery):
         return d->valueDelimiter == other.d->valueDelimiter &&
                 d->pairDelimiter == other.d->pairDelimiter &&
                 d->itemList == other.d->itemList;
     return false;
 }
 
+/*!
+    \since 5.6
+    \relates QUrlQuery
+
+    Returns the hash value for \a key,
+    using \a seed to seed the calculation.
+*/
+uint qHash(const QUrlQuery &key, uint seed) Q_DECL_NOTHROW
+{
+    if (const QUrlQueryPrivate *d = key.d) {
+        QtPrivate::QHashCombine hash;
+        // keep in sync with operator==:
+        seed = hash(seed, d->valueDelimiter);
+        seed = hash(seed, d->pairDelimiter);
+        seed = hash(seed, d->itemList);
+    }
+    return seed;
+}
+
 /*!
     Returns \c true if this QUrlQuery object contains no key-value pairs, such as
     after being default-constructed or after parsing an empty query string.
diff --git a/src/corelib/io/qurlquery.h b/src/corelib/io/qurlquery.h
index 77a0b4a82d..21962fcb22 100644
--- a/src/corelib/io/qurlquery.h
+++ b/src/corelib/io/qurlquery.h
@@ -44,6 +44,8 @@
 
 QT_BEGIN_NAMESPACE
 
+Q_CORE_EXPORT uint qHash(const QUrlQuery &key, uint seed = 0) Q_DECL_NOTHROW;
+
 class QUrlQueryPrivate;
 class Q_CORE_EXPORT QUrlQuery
 {
@@ -95,6 +97,7 @@ public:
 
 private:
     friend class QUrl;
+    friend Q_CORE_EXPORT uint qHash(const QUrlQuery &key, uint seed) Q_DECL_NOTHROW;
     QSharedDataPointer<QUrlQueryPrivate> d;
 public:
     typedef QSharedDataPointer<QUrlQueryPrivate> DataPtr;
-- 
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