diff options
| author | Sona Kurazyan <sona.kurazyan@qt.io> | 2022-01-20 14:02:34 +0100 |
|---|---|---|
| committer | Sona Kurazyan <sona.kurazyan@qt.io> | 2022-01-20 22:56:11 +0100 |
| commit | 7f318327e57122c7f49bdef9915153f6956a5c7d (patch) | |
| tree | 8a7db57fbfb530daf507a0bc370f12f9dc032778 /src/concurrent/qtconcurrentfunctionwrappers.h | |
| parent | d99714e3166dccbcbf5218325ce8c4da6070a68a (diff) | |
QtConcurrent: use variable templates for compile-time checks
Noticed during the API review.
Pick-to: 6.3 6.2
Task-number: QTBUG-99883
Change-Id: I19571343a0cf0609beae2422ef1f69f7a34eb9ac
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Diffstat (limited to 'src/concurrent/qtconcurrentfunctionwrappers.h')
| -rw-r--r-- | src/concurrent/qtconcurrentfunctionwrappers.h | 19 |
1 files changed, 6 insertions, 13 deletions
diff --git a/src/concurrent/qtconcurrentfunctionwrappers.h b/src/concurrent/qtconcurrentfunctionwrappers.h index 08966115d6d..e9154070bc8 100644 --- a/src/concurrent/qtconcurrentfunctionwrappers.h +++ b/src/concurrent/qtconcurrentfunctionwrappers.h @@ -142,24 +142,17 @@ struct ReduceResultType<T(C::*)(U) noexcept> }; template<class T, class Enable = void> -struct hasCallOperator : std::false_type -{ -}; +inline constexpr bool hasCallOperator_v = false; template<class T> -struct hasCallOperator<T, std::void_t<decltype(&T::operator())>> : std::true_type -{ -}; +inline constexpr bool hasCallOperator_v<T, std::void_t<decltype(&T::operator())>> = true; template<class T, class Enable = void> -struct isIterator : std::false_type -{ -}; +inline constexpr bool isIterator_v = false; template<class T> -struct isIterator<T, std::void_t<typename std::iterator_traits<T>::value_type>> : std::true_type -{ -}; +inline constexpr bool isIterator_v<T, std::void_t<typename std::iterator_traits<T>::value_type>> = + true; template <class Callable, class Sequence> using isInvocable = std::is_invocable<Callable, typename std::decay_t<Sequence>::value_type>; @@ -180,7 +173,7 @@ struct ReduceResultTypeHelper<Callable, template <class Callable> struct ReduceResultTypeHelper<Callable, typename std::enable_if_t<!std::is_function_v<std::remove_pointer_t<std::decay_t<Callable>>> - && hasCallOperator<std::decay_t<Callable>>::value>> + && hasCallOperator_v<std::decay_t<Callable>>>> { using type = std::decay_t<typename QtPrivate::ArgResolver<Callable>::First>; }; |