Static function variables in Swift -


i'm trying figure out how declare static variable scoped locally function in swift.

in c, might this:

int foo() {     static int timescalled = 0;     ++timescalled;     return timescalled; }

in objective-c, it's same:

- (nsinteger)foo {     static nsinteger timescalled = 0;     ++timescalled;     return timescalled; }

but can't seem in swift. i've tried declaring variable in following ways:

static var timescalleda = 0 var static timescalledb = 0 var timescalledc: static int = 0 var timescalledd: int static = 0

but these result in errors.

  • the first complains "static properties may declared on type".
  • the second complains "expected declaration" (where static is) , "expected pattern" (where timescalledb is)
  • the third complains "consecutive statements on line must separated ';'" (in space between colon , static) , "expected type" (where static is)
  • the fourth complains "consecutive statements on line must separated ';'" (in space between int , static) , "expected declaration" (under equals sign)

i don't think swift supports static variable without having attached class/struct. try declaring private struct static variable. 

func foo() -> int {     struct holder {         static var timescalled = 0     }     holder.timescalled += 1     return holder.timescalled }    7> foo() $r0: int = 1   8> foo() $r1: int = 2   9> foo() $r2: int = 3

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