| // RUN: %target-run-simple-swift | %FileCheck %s |
| // REQUIRES: executable_test |
| |
| typealias Interval = (lo: Int, hi: Int) |
| |
| infix operator <+> |
| infix operator <-> |
| infix operator <+>= |
| |
| func <+>(a: Interval, b: Interval) -> Interval { |
| return (a.lo + b.lo, a.hi + b.hi) |
| } |
| |
| func <->(a: Interval, b: Interval) -> Interval { |
| return (a.lo - b.hi, a.hi - b.lo) |
| } |
| |
| func <+>=(a: inout Interval, b: Interval) { |
| a.lo += b.lo |
| a.hi += b.hi |
| } |
| |
| func print(_ x: Interval) { |
| print("(lo=\(x.lo), hi=\(x.hi))") |
| } |
| |
| // CHECK: (lo=4, hi=6) |
| print((1,2) <+> (3,4)) |
| // CHECK: (lo=4, hi=6) |
| print((hi:2,lo:1) <+> (lo:3,hi:4)) |
| // CHECK: (lo=1, hi=3) |
| print((3,4) <-> (1,2)) |
| |
| func mutate() { |
| var x:Interval = (1, 2) |
| x <+>= (3, 4) |
| // CHECK: (lo=4, hi=6) |
| print(x) |
| } |
| mutate() |
| |
| func printInts(_ ints: Int...) { |
| print("\(ints.count) ints: ", terminator: "") |
| for int in ints { |
| print("\(int) ", terminator: "") |
| } |
| print("\n", terminator: "") |
| } |
| |
| // CHECK: 0 ints |
| printInts() |
| // CHECK: 1 ints: 1 |
| printInts(1) |
| // CHECK: 3 ints: 1 2 3 |
| printInts(1,2,3) |
