156 lines
4.3 KiB
C++
156 lines
4.3 KiB
C++
/******************************************************************************
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* QSkinny - Copyright (C) 2016 Uwe Rathmann
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* This file may be used under the terms of the QSkinny License, Version 1.0
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*****************************************************************************/
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#ifndef QSK_META_FUNCTION_H
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#define QSK_META_FUNCTION_H 1
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#include "QskGlobal.h"
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#include "QskMetaInvokable.h"
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#include <QMetaType>
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namespace QskMetaFunctionTraits
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{
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using namespace QtPrivate;
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template< typename T >
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using IsMemberFunction = typename std::enable_if< FunctionPointer< T >::IsPointerToMemberFunction,
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std::true_type >::type;
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template< typename T >
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using IsFunction = typename std::enable_if< !FunctionPointer< T >::IsPointerToMemberFunction
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&& FunctionPointer< T >::ArgumentCount >= 0, std::true_type >::type;
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template< typename T >
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using IsFunctor = typename std::enable_if< !FunctionPointer< T >::IsPointerToMemberFunction
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&& FunctionPointer< T >::ArgumentCount == -1, std::true_type >::type;
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}
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class QSK_EXPORT QskMetaFunction
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{
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Q_GADGET
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public:
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enum Type
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{
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Invalid = -1,
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// a non static method of class
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Member,
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// a static function, or static method of a class
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Function,
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// a functor or lambda
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Functor
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};
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Q_ENUM( Type )
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QskMetaFunction();
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QskMetaFunction( const QskMetaFunction& );
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QskMetaFunction( QskMetaFunction&& );
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template< typename T, QskMetaFunctionTraits::IsMemberFunction< T >* = nullptr >
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QskMetaFunction( T );
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template< typename T, QskMetaFunctionTraits::IsFunction< T >* = nullptr >
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QskMetaFunction( T );
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template< typename T, QskMetaFunctionTraits::IsFunctor< T >* = nullptr >
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QskMetaFunction( T );
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~QskMetaFunction();
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QskMetaFunction& operator=( const QskMetaFunction& );
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QskMetaFunction& operator=( QskMetaFunction&& );
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const int* parameterTypes() const;
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// including the return type !
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size_t parameterCount() const;
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void invoke( QObject*, void* args[],
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Qt::ConnectionType = Qt::AutoConnection );
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Type functionType() const;
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protected:
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friend class QskMetaCallback;
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QskMetaFunction( QskMetaInvokable*, const int* );
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QskMetaInvokable* invokable() const;
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private:
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QskMetaInvokable* m_invokable;
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const int* m_parameterTypes;
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};
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inline QskMetaInvokable* QskMetaFunction::invokable() const
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{
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return m_invokable;
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}
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inline const int* QskMetaFunction::parameterTypes() const
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{
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return m_parameterTypes;
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}
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template< typename T, QskMetaFunctionTraits::IsMemberFunction< T >* >
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inline QskMetaFunction::QskMetaFunction( T function )
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{
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using namespace QtPrivate;
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using Traits = FunctionPointer< T >;
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constexpr int Argc = Traits::ArgumentCount;
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using Args = typename List_Left< typename Traits::Arguments, Argc >::Value;
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m_invokable = QskMetaInvokable::instance(
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QskMetaMemberInvokable< T, Args, void >::invoke,
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reinterpret_cast< void** >( &function ) );
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m_parameterTypes = ConnectionTypes< typename Traits::Arguments >::types();
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}
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template< typename T, QskMetaFunctionTraits::IsFunction< T >* >
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inline QskMetaFunction::QskMetaFunction( T function )
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{
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using namespace QtPrivate;
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using Traits = FunctionPointer< T >;
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constexpr int Argc = Traits::ArgumentCount;
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using Args = typename List_Left< typename Traits::Arguments, Argc >::Value;
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m_invokable = QskMetaInvokable::instance(
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QskMetaFunctionInvokable< T, Args, void >::invoke,
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reinterpret_cast< void** >( &function ) );
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m_parameterTypes = ConnectionTypes< typename Traits::Arguments >::types();
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}
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template< typename T, QskMetaFunctionTraits::IsFunctor< T >* >
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inline QskMetaFunction::QskMetaFunction( T functor )
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{
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using namespace QtPrivate;
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using Traits = FunctionPointer< decltype( &T::operator() ) >;
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constexpr int Argc = Traits::ArgumentCount;
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using Args = typename List_Left< typename Traits::Arguments, Argc >::Value;
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m_invokable = QskMetaInvokable::instance(
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QskMetaFunctorInvokable< T, Argc, Args, void >::invoke,
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reinterpret_cast< void** >( &functor ) );
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m_parameterTypes = ConnectionTypes< typename Traits::Arguments >::types();
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}
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Q_DECLARE_METATYPE( QskMetaFunction )
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#endif
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