CODEWITHSUNDEEP
c++qtqt-creatordllexportpimpl-idiom
MeiH
MeiH

Reputation: 1865

Pointer to implementation (PIMPL) in Qt

I made a Dll with MSVS and used pimpl method successfuly exactly like below:

Dll include file:

#include <memory>

#define DllExport __declspec( dllexport ) 

namespace M
{
    class P
    {
    public:
        DllExport P(/*some arguments*/);
        DllExport ~P();
        DllExport int aFunction (/* some arguments*/);

    private:
        class C;
        std::unique_ptr<C> mc;
    };
}

The private include file:

namespace M
{
    class P::C
    {
        public:
         # Other variables and functions which are not needed to be exported...
    }
}

And the cpp file:

DllExport M::P::P(/*some arguments*/):mc(std::make_unique<C>())
{
# ...
}
DllExport M::P::~P(){ }

DllExport int M::P::aFunction (/* some arguments*/)
{
#...
}

Now I want to implement such method in Qt creator. What changes I should make?

(I guess I have to use QScopedPointer instead of unique_ptr but what is best implementation form for that?)

PS: I set clang as compiler.

Upvotes: 0

Views: 378

Answers (2)

MeiH
MeiH

Reputation: 1865

Using QScopedPointer I managed to make it work like the way I wanted:

Dll include:

#define DllExport __declspec( dllexport )

#include <QScopedPointer>

namespace M{
class PPrivate;

class P
{
public:
    DllExport P(/*some arguments*/);
    DllExport ~P();
    DllExport int aFunction (/* some arguments*/);

private:

    Q_DECLARE_PRIVATE(P)
    QScopedPointer<PPrivate> d_ptr;
};
}

Private include:

namespace M
{
    class PPrivate
    {
        public:
            # Other variables and functions which are not needed to be exported...
    }
}

The CPP file:

DllExport M::P::P(/*some arguments*/)
    :d_ptr(new PPrivate())
{ 
    #...
}
DllExport M::P::~P(){ }

DllExport int M::P::aFunction (/* some arguments*/)
{
    #...
}

Yet if somebody thinks there is a better idea, please share.

Upvotes: 0

Louis Kr&#246;ger
Louis Kr&#246;ger

Reputation: 374

Your code looks find and it should be independent from the IDE. You can use this, but i think this is what you are searching for.

Upvotes: 1

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