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Using more constexpr in metaclass system, that was not possible before due to compiler bugs.

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This commit is contained in:
Mat Sutcliffe
2019-02-28 20:09:49 +00:00
parent a366ad8943
commit 3454e08bb1
6 changed files with 20 additions and 20 deletions
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16
src/blackmisc/metaclass.h
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@@ -239,12 +239,12 @@ namespace BlackMisc
//! Return a CMetaClassIntrospector<T> covering only those members which have the given flags.
//! \see BlackMisc::MetaFlags
template <typename Flags>
static auto with(Flags) { return filter(MaskSequence<(members().at(index<Is>()).has(Flags()))...>()); }
constexpr static auto with(Flags) { return filter(MaskSequence<(members().at(index<Is>()).has(Flags()))...>()); }
//! Return a CMetaClassIntrospector<T> covering only those members which do not have the given flags.
//! \see BlackMisc::MetaFlags
template <typename Flags>
static auto without(Flags) { return filter(MaskSequence<(! members().at(index<Is>()).has(Flags()))...>()); }
constexpr static auto without(Flags) { return filter(MaskSequence<(! members().at(index<Is>()).has(Flags()))...>()); }
//! For each metamember in metaclass, pass metamember as argument to visitor function.
template <typename F>
@@ -263,7 +263,7 @@ namespace BlackMisc
using MaskSequence = Private::MaskSequence<std::index_sequence<Is...>, Mask...>;
template <size_t... Js>
static auto filter(std::index_sequence<Js...>) { return CMetaClassIntrospector<T, MetaClass, Js...>(); }
constexpr static auto filter(std::index_sequence<Js...>) { return CMetaClassIntrospector<T, MetaClass, Js...>(); }
template <size_t I>
using index = std::integral_constant<size_t, I>;
@@ -278,22 +278,22 @@ namespace BlackMisc
struct CMetaClassAccessor
{
template <typename T, size_t... Is>
static auto getIntrospector(std::index_sequence<Is...>)
constexpr static auto getIntrospector(std::index_sequence<Is...>)
{
return CMetaClassIntrospector<T, typename T::MetaClass, Is...>();
}
template <typename T>
static auto getIntrospector()
constexpr static auto getIntrospector()
{
return getIntrospector<T>(std::make_index_sequence<T::MetaClass::getMemberList().c_size>());
}
template <typename T>
static std::true_type hasMetaClass(int, typename T::MetaClass * = nullptr) { return {}; }
constexpr static std::true_type hasMetaClass(int, typename T::MetaClass * = nullptr) { return {}; }
template <typename T>
static std::false_type hasMetaClass(...) { return {}; }
constexpr static std::false_type hasMetaClass(...) { return {}; }
};
}
@@ -303,7 +303,7 @@ namespace BlackMisc
* \ingroup MetaClass
*/
template <typename T>
auto introspect()
constexpr auto introspect()
{
return Private::CMetaClassAccessor::getIntrospector<T>();
}