CODEWITHSUNDEEP
iosswift
Daniel Klöck
Daniel Klöck

Reputation: 21137

precompiler conditional compiling two cases

I have something like this in my App:

#if PRODUCTION
let code: String? = "1111"
#elseif DEMO
let code: String? = "2222"
#elseif TEST
let code: String? = "3333"
#else
let code: String? = "0000"
#endif

The problem is that at a deployment target, which has the flags DEMO and TEST, I get Definition conflicts with previous value for the lines 4 and 6. How is this possible? isn't #elseif supposed to be exclusive?

UPDATE

Although it is strange, this works:

let code: String?

#if PRODUCTION
code = "1111"
#elseif DEMO
code = "2222"
#elseif TEST
code = "3333"
#else
code = "0000"
#endif

I also have targets where only TEST or PRODUCTION is defined and it worked with the previous code, so I suppose only cases that could possibly be compiled are parsed.

Upvotes: 1

Views: 71

Answers (1)

Godlike
Godlike

Reputation: 1928

Build Configuration Statement

Each statement in the body of a build configuration statement is parsed even if it’s not complied.

https://developer.apple.com/library/ios/documentation/Swift/Conceptual/Swift_Programming_Language/Statements.html

I don't know why Apple parses every statement in the Build Configuration Statement, but they do and I think this causes the problem.

Upvotes: 1

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