Conditional configuration of a C++ module

[JUANDENT]

Hi,

I am looking for ways to configure a C++ 20 Module. For instance:

in ordinary (pre C++ 20) code I have this conditional compilation:

#if CONDITION == 1
void do_something();
#else
void do_something_else();
#endif 

If this conditional code is in a .ixx file (module interface file), how can I configure it?

Since I cannot use macros that are visible in the module, I thought I'd use a :

export constinit int configuration = 1;

#if configuration == 1
void do_something();
#else
void do_something_else();
#endif 

]

This does not seem to work either because preprocessor occurs before compilation.


Any ideas?

Regards,
Juan

[coder777]

It depends on what you are trying to achieve with this condition.

Normally I would say: Put the conditional code each in its own file. Depending on what you want to do include the one or other in your project.