Paste '::' in using a macro

[Aslaville]

Is there a way I could get around gcc and clang and paste '::' from am macro?

#define reg(f, t, p) \
     object::##f 
    /* do some stuff */

I think MSVC will accept such code but gcc and clang do not.

[laserlight]

Maybe if object is a namespace name you could get away with:

#define reg(f, t, p) do { \
    using namespace object; \
    /* do some stuff */ \
} while (false)

[Aslaville]

Maybe if object is a namespace name you could get away with:

#define reg(f, t, p) do { \
    using namespace object; \
    /* do some stuff */ \
} while (false)

Yeah that could work with an namespace.

Am trying to assign member function of 'object' to another object.ahh

#define reg(f, t, p) do { \ 
     array[5] = object::##f \
     /* do some stuff */
} while (false)

f is a member of object.
I have to assign about 100 of this functions so if I got around the macro, I could save myself a ton of code.

[grumpy]

The C++ preprocessor is already aware that some_namespace::some_member is three distinct tokens some_namespace, ::, and some_member, so does not need to do token pasting. The solution is to remove the ##.

#define reg(f, t, p) do { \
     array[5] = object::f \
     /* do some stuff */
} while (false)

[Aslaville]

The C++ preprocessor is already aware that some_namespace::some_member is three distinct tokens some_namespace, ::, and some_member, so does not need to do token pasting. The solution is to remove the ##.

#define reg(f, t, p) do { \
     array[5] = object::f \
     /* do some stuff */
} while (false)

Aah, cool. Thanks