Swift compiler macro / flag for String value alternative -


in objective-c add c flag of -dvar_name=@\"string value\" , value nsstring *var = var_name.

how in swift?

an example of defining api host based on current git branch. branch feature1 , should connected https://feature1.example.com. shell script can find current branch , add c flag. in objective-c can use branch shell script generate api host url.

update

i not asking boolean flags. need pass string value.

update 2

so far can come use build script generate swift class.

update 3

another option add custom keys info.plist. isn't acceptable solution configuration values works.

macros evil. have been abused things , it's not clean solution. have following options (some of them mentioned you).

  1. info.plist

the simple, easy read , edit. not big configurations.

  1. your own .plist.

easy read , edit (even command line tools before build, see plistbuddy tool). better bigger configurations.

  1. auto generated code

your code can contain expression can matched easily, e.g.

let myconfigvalue = "${my-config-value}".

you can replace values using command line tools, e.g. sed. replicates macros without using c preprocessor. not clean usable if have build system don't want change.

  1. multiple code variants

you can have swift file configuration constants , use #if switch between them.


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