\inmodule QtCore More...

#include <qtypeinfo.h>

Collaboration diagram for QTypeInfoMerger< T, Ts >:

Static Public Attributes
static constexpr bool	isComplex = ((QTypeInfo<Ts>::isComplex) \|\| ...)

static constexpr bool	isRelocatable = ((QTypeInfo<Ts>::isRelocatable) && ...)

static constexpr bool	isPointer = false

static constexpr bool	isIntegral = false

static constexpr bool	isValueInitializationBitwiseZero = false

Detailed Description

template<class T, class... Ts>
class QTypeInfoMerger< T, Ts >

\inmodule QtCore

QTypeInfoMerger merges the QTypeInfo flags of T1, T2... and presents them as a QTypeInfo<T> would do.

Let's assume that we have a simple set of structs:

class B {...};
class C {...};
class D {...};
struct A : public B {
    C c;
    D d;
};

To create a proper QTypeInfo specialization for A struct, we have to check all sub-components; B, C and D, then take the lowest common denominator and call Q_DECLARE_TYPEINFO with the resulting flags. An easier and less fragile approach is to use QTypeInfoMerger, which does that automatically. So struct A would have the following QTypeInfo definition:

template<> class QTypeInfo<A> : public QTypeInfoMerger<A, B, C, D> {};

QTypeInfoMerger

\inmodule QtCore

Definition qtypeinfo.h:92

QTypeInfo

Definition qtypeinfo.h:46

Definition at line 91 of file qtypeinfo.h.