Conditional exclusion of code in Swift

Question

I am trying to exclude some parts of a Swift file for a specific target. Yet I did not find any replacement of the #ifndef objective-c directive and moreover if I use a form of the kind:

#if taxi_coops
func pippo(){
    println("pippo");
}
#else
func triggerActiveLocationUpdate(entering:Bool){}
#endif

The preprocessor totally ignores the directive and tries to compile triggerActiveLocationUpdate. Please note the #if taxi_coops directive is respected in other parts of the same file.

Is there some way to simply exclude some pieces of code in Swift and/or why my fix does not work?

Possible duplicate of [In absence of preprocessor macros, is there a way to define practical scheme specific flags at project level in Xcode project](http://stackoverflow.com/questions/24111854/in-absence-of-preprocessor-macros-is-there-a-way-to-define-practical-scheme-spe). — Martin R, Jul 14 '15 at 15:04
Btw, you have now asked quite a few questions and got answers to many of them. Please don't forget to *accept* answers that helped. — Martin R, Jul 14 '15 at 15:09
It may be a duplicate, as I said in other paces it worked, at last the if part. But in my code it does not work. Also I did not find anywhere how to express #ifndef. — Fabrizio Bartolomucci, Jul 14 '15 at 15:36
Most questions I answered myself, and took care to report my findings. For the others I hope to cover all of them. — Fabrizio Bartolomucci, Jul 14 '15 at 15:37
You can also accept your own answers to mark the problem as solved. — Martin R, Jul 14 '15 at 15:39
Sure, but in this case I have no answer myself, nor from other users. — Fabrizio Bartolomucci, Jul 14 '15 at 15:44

score 20 · Answer 1 · answered Oct 14 '16 at 22:35

20

In Swift, use #if ! as a replacement for #ifndef, e.g.:

#if !os(OSX)
    // compiled when not on OS X
#endif

answered Oct 14 '16 at 22:35

par

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score 13 · Accepted Answer · answered Jul 16 '15 at 13:20

The issue was about replicating the configuration in the Other Swift Flags file in the form

-D option

Apparently Swift ignores the flags in the preprocessor field. Now it accepts ||, && and ! without any problem with syntax:

#if option || !option2
......
#elseif option3
......
#endif

Conditional exclusion of code in Swift

2 Answers2