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//a header file

#define API_ABC

//a CPP file

class API_ABC Myclass;


class Myclass{
......
};

What does "#define API_ABC" do when declaring a class(Myclass in this
case)? Why use it?

Thanks.

WM

wrote:
> //a header file
>
> #define API_ABC
>
> //a CPP file
>
> class API_ABC Myclass;
>
>
> class Myclass{
> .....
> };
>
> What does "#define API_ABC" do when declaring a class(Myclass in this
> case)? Why use it?

Why don't you ask the one who wrote it?

In some systems you're allowed to give additional qualifiers to any
symbol or class, like __declspec(dllexport) or some such nonsense.
Perhaps in some other incarnation of this code 'API_ABC' is actually
defined to expand into some kind of linkage specification...

V

In message < .com>,
writes
>//a header file
>
>#define API_ABC
>
>//a CPP file
>
>class API_ABC Myclass;
>
>
>class Myclass{
>.....
>};
>
>What does "#define API_ABC" do when declaring a class(Myclass in this
>case)?

Nothing, in this case.

>Why use it?

(a) Maybe as a hint to the maintainer that the class is an abstract base
class needed for this application programming interface .

(b) In some programming environments the macro might be differently
defined, so it expands to some (non-standard) compiler- and
platform-dependent string which tells the compiler to do something
special with the class.

--
Richard Herring