flightsimulatorplatfrom/pilotclient
1
0
Fork 0
mirror of https://github.com/swift-project/pilotclient.git synced 2026-04-13 07:35:41 +08:00
Code Issues Packages Projects Releases Wiki Activity

Use if constexpr in metaclass visitor functions

Browse Source
This commit is contained in:
Mat Sutcliffe
2021-04-18 17:50:41 +01:00
parent d7a461ff7a
commit 0ebe21a7cf
7 changed files with 98 additions and 79 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
src/blackmisc/metaclass.h
View File

@@ -12,7 +12,6 @@
#define BLACKMISC_METACLASS_H
#include "blackmisc/invoke.h"
#include "blackmisc/integersequence.h"
#include <QHash>
#include <QString>
#include <QLatin1String>
@@ -169,7 +168,7 @@ namespace BlackMisc
//! True if m_flags contains all flags.
template <typename Flags2>
constexpr bool has(Flags2 flags) const { return (MetaFlags<Flags>() & flags) == flags; }
static constexpr bool has(Flags2 flags) { return (MetaFlags<Flags>() & flags) == flags; }
//! Invoke the member on an instance of the value class.
template <typename T, typename... Ts>
@@ -266,34 +265,12 @@ namespace BlackMisc
class CMetaClassIntrospector
{
public:
//! Return a CMetaClassIntrospector<T> covering only those members which have the given flags.
//! \see BlackMisc::MetaFlags
template <typename 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>
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>
static void forEachMember(F &&visitor)
{
(static_cast<void>(std::forward<F>(visitor)(members().at(index<Is>()))), ...);
(static_cast<void>(std::forward<F>(visitor)(MetaClass::getMemberList().at(std::integral_constant<size_t, Is>()))), ...);
}
private:
template <bool... Mask>
using MaskSequence = Private::MaskSequence<std::index_sequence<Is...>, Mask...>;
template <size_t... 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>;
constexpr static auto members() { return MetaClass::getMemberList(); }
};
// *INDENT-ON*