diff options
| author | Marc Mutz <marc.mutz@kdab.com> | 2015-12-28 15:58:03 +0100 |
|---|---|---|
| committer | Jędrzej Nowacki <jedrzej.nowacki@theqtcompany.com> | 2015-12-30 11:37:53 +0000 |
| commit | d681107f1fcbaabe7da27ac51563434b81b95d8e (patch) | |
| tree | 5060bcb500d29f3d50c82b640bfcd89bfdd50d2f /src/corelib/tools/qhashfunctions.h | |
| parent | ad74c953998133887ac2362800772e0fa01dd3da (diff) | |
Add qHash(std::pair)
We already include <utility> in <qglobal.h>, so we might
as well provide a qHash() overload for std::pair.
[ChangeLog][QtCore] Added qHash(std::pair), defined in
<QHashFunctions>.
Change-Id: I0f61c513e82e05ce9d2e56bcf18f3be9e2da4da9
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
Diffstat (limited to 'src/corelib/tools/qhashfunctions.h')
| -rw-r--r-- | src/corelib/tools/qhashfunctions.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/corelib/tools/qhashfunctions.h b/src/corelib/tools/qhashfunctions.h index e15fbb07ac..c0109f3bbb 100644 --- a/src/corelib/tools/qhashfunctions.h +++ b/src/corelib/tools/qhashfunctions.h @@ -147,6 +147,15 @@ template <typename T1, typename T2> inline uint qHash(const QPair<T1, T2> &key, return ((h1 << 16) | (h1 >> 16)) ^ h2 ^ seed; } +template <typename T1, typename T2> inline uint qHash(const std::pair<T1, T2> &key, uint seed = 0) + Q_DECL_NOEXCEPT_EXPR(noexcept(qHash(key.first, seed)) && noexcept(qHash(key.second, seed))) +{ + QtPrivate::QHashCombine hash; + seed = hash(seed, key.first); + seed = hash(seed, key.second); + return seed; +} + QT_END_NAMESPACE #if defined(Q_CC_MSVC) |