c++ - Will including new IDs require recompile? -

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globals.h

#define id1 1 #define id2 2

factory.h

item* makeitem(int id);

will including new ids in globals.h require recompile of files use makeitem old ids?

also how know changes require recompile or re-linking of dependents?

any change globals.h require recompile of files #include globals.h or include header files include globals.h. if list of ids changes often, , lots of files depend on it, , project big, might become nuisance.

one way around split globals.h different h-files, each h-file used relatively small part of project. then, change in 1 of them not require recompiling.

if this, typically face challenge of keeping of ids unique. if defined in different header files, developer making change in 1 file may not know causing collision id defined in file. 1 solution follow documented convention, in every h-file ids defined has associated range of ids, , ranges not overlapping.


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