Question

I am trying to pass a member function to QtConcurrent::run()

I have tried to do it like so:

GDALDriver *poNITFDriver;
future = QtConcurrent::run(poNITFDriver,&GDALDriver::CreateCopy, pszDstFilename, poDataset, FALSE,  papszOptions, pfnProgress, NULL);

but I get a slew of errors regarding no matching function call.

This was the original call:

poNITFDriver->CreateCopy(pszDstFilename, poDataset, FALSE, papszOptions, pfnProgress, NULL);

What am I doing wrong? Can run() accept that many arguments?

This is the error I get:

error: no matching function for call to run(GDALDriver*&, GDALDataset* (GDALDriver::*)(const char*, GDALDataset*, int, char**, int (*)(double, const char*, void*), void*), const char**, GDALDataset**, bool, char***, int (**)(double, const char*, void*), NULL)

Thanks

Answer 1

You will have to pass a pointer of the object as the first argument and the address of the method as the second argument (then follow it by any other arguments).

Have a look at this documentation. Have a look at the sections:

• Using Member Functions
• Using Lambda Functions

Specifically, you can use boost::bind() or std::tr1::bind() to bind a number of arguments to a function when called. There are number of reasons for doing this:

• To call a function that takes more than 5 arguments.
• To simplify calling a function with constant arguments.
• Changing the order of arguments.

I think you have more than 5 parameters being passed there.