diff options
Diffstat (limited to 'src/corelib/tools/qhash.h')
| -rw-r--r-- | src/corelib/tools/qhash.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/corelib/tools/qhash.h b/src/corelib/tools/qhash.h index 7abbeabeae..6a2d7bdd11 100644 --- a/src/corelib/tools/qhash.h +++ b/src/corelib/tools/qhash.h @@ -1095,6 +1095,27 @@ Q_INLINE_TEMPLATE int QMultiHash<Key, T>::count(const Key &key, const T &value) Q_DECLARE_ASSOCIATIVE_ITERATOR(Hash) Q_DECLARE_MUTABLE_ASSOCIATIVE_ITERATOR(Hash) +template <class Key, class T> +uint qHash(const QHash<Key, T> &key, uint seed = 0) + Q_DECL_NOEXCEPT_EXPR(noexcept(qHash(std::declval<Key&>())) && noexcept(qHash(std::declval<T&>()))) +{ + QtPrivate::QHashCombineCommutative hash; + for (auto it = key.begin(), end = key.end(); it != end; ++it) { + const Key &k = it.key(); + const T &v = it.value(); + seed = hash(seed, std::pair<const Key&, const T&>(k, v)); + } + return seed; +} + +template <class Key, class T> +inline uint qHash(const QMultiHash<Key, T> &key, uint seed = 0) + Q_DECL_NOEXCEPT_EXPR(noexcept(qHash(std::declval<Key&>())) && noexcept(qHash(std::declval<T&>()))) +{ + const QHash<Key, T> &key2 = key; + return qHash(key2, seed); +} + QT_END_NAMESPACE #if defined(Q_CC_MSVC) |