diff options
Diffstat (limited to 'src')
-rw-r--r-- | src/corelib/kernel/qvariant.cpp | 6 | ||||
-rw-r--r-- | src/corelib/kernel/qvariant.h | 21 |
2 files changed, 24 insertions, 3 deletions
diff --git a/src/corelib/kernel/qvariant.cpp b/src/corelib/kernel/qvariant.cpp index 8e2457350c..30da12c95b 100644 --- a/src/corelib/kernel/qvariant.cpp +++ b/src/corelib/kernel/qvariant.cpp @@ -2722,6 +2722,12 @@ QT_WARNING_POP */ /*! + \fn template<typename... Types> QVariant QVariant::fromStdVariant(std::variant<Types...> &&value) + \since 6.6 + \overload +*/ + +/*! \fn template<typename T> T qvariant_cast(const QVariant &value) \relates QVariant diff --git a/src/corelib/kernel/qvariant.h b/src/corelib/kernel/qvariant.h index 582f135fab..fe99ad6bdd 100644 --- a/src/corelib/kernel/qvariant.h +++ b/src/corelib/kernel/qvariant.h @@ -569,9 +569,13 @@ public: template<typename... Types> static inline QVariant fromStdVariant(const std::variant<Types...> &value) { - if (value.valueless_by_exception()) - return QVariant(); - return std::visit([](const auto &arg) { return QVariant::fromValue(arg); }, value); + return fromStdVariantImpl(value); + } + + template<typename... Types> + static QVariant fromStdVariant(std::variant<Types...> &&value) + { + return fromStdVariantImpl(std::move(value)); } template<typename T> @@ -585,6 +589,17 @@ public: static QPartialOrdering compare(const QVariant &lhs, const QVariant &rhs); private: + template <typename StdVariant> + static QVariant fromStdVariantImpl(StdVariant &&v) + { + if (Q_UNLIKELY(v.valueless_by_exception())) + return QVariant(); + auto visitor = [](auto &&arg) { + return QVariant::fromValue(q23::forward_like<StdVariant>(arg)); + }; + return std::visit(visitor, std::forward<StdVariant>(v)); + } + friend inline bool operator==(const QVariant &a, const QVariant &b) { return a.equals(b); } friend inline bool operator!=(const QVariant &a, const QVariant &b) |