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55 lines
967 B
Swift
55 lines
967 B
Swift
// RUN: %swift -i %s | FileCheck %s
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typealias Interval = (lo:Int, hi:Int)
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operator infix <+> {}
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operator infix <-> {}
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operator infix <+>= {}
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func <+>(a:Interval, b:Interval) -> Interval {
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return (a.lo + b.lo, a.hi + b.hi)
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}
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func <->(a:Interval, b:Interval) -> Interval {
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return (a.lo - b.hi, a.hi - b.lo)
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}
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func [assignment] <+>=(a:[byref] Interval, b:Interval) {
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a.lo += b.lo
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a.hi += b.hi
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}
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func println(x:Interval) {
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println("(lo=\(x.lo), hi=\(x.hi))")
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}
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// CHECK: (lo=4, hi=6)
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println((1,2) <+> (3,4))
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// CHECK: (lo=4, hi=6)
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println((hi:2,lo:1) <+> (lo:3,hi:4))
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// CHECK: (lo=1, hi=3)
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println((3,4) <-> (1,2))
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func mutate() {
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var x:Interval = (1, 2)
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x <+>= (3, 4)
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// CHECK: (lo=4, hi=6)
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println(x)
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}
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mutate()
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func printInts(ints:Int...) {
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print("\(ints.length) ints: ")
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for int in ints {
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print("\(int) ")
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}
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print("\n")
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}
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// CHECK: 0 ints
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printInts()
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// CHECK: 1 ints: 1
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printInts(1)
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// CHECK: 3 ints: 1 2 3
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printInts(1,2,3)
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