Il 20/06/2018 12:14, Michael Van Canneyt ha scritto:
If you need a preprocessor, maybe you simply need to rethink your design.
If you could explain your actual problem, maybe we can help solving it
without resorting to preprocessing.
In my experience a preprocessor comes handy mainly during the
development of an application. E.g.: you need to evaluate if solution A
is better than solution B, and each solution involves calling a
different procedure with a different number of parameters, in dozens of
points of your code.
This is an example from a C program:
#define CON_TMAX #ifdef CON_TMAX #define AspettaRisposta(x,y,z) SMD
aspetta_risp(y,z) #else #define AspettaRisposta(x,y,z) SMD rqwait(x,z)
#endif
A #define makes it possible to compare the two solutions with the same
efficiency you'll get in the final version. A workaround, such as an
extra procedure which does the same job, generates some extra code and
may not tell you the full story.
It's not matter of rethinking the design, but of picking up the best design.
Just my 2 cents
Giuliano
_______________________________________________
fpc-pascal maillist - fpc-pascal@lists.freepascal.org
http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
