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Make GridPoint support dictionaries

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Add hashValue propertiy and Hashable protocol
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peterr
2018-12-15 00:47:20 -06:00
parent 3e711561fa
commit 944fad0f02
1 changed files with 6 additions and 1 deletions
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Sources/AOC2018/tools.swift
+6 -1
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@@ -19,9 +19,14 @@ func == <T:Equatable> (tuple1:(T,T),tuple2:(T,T)) -> Bool
return (tuple1.0 == tuple2.0) && (tuple1.1 == tuple2.1) return (tuple1.0 == tuple2.0) && (tuple1.1 == tuple2.1)
} }
struct GridPoint: Equatable, Comparable { struct GridPoint: Equatable, Comparable, Hashable {
var X = 0 var X = 0
var Y = 0 var Y = 0
var hashValue: Int {
get {
return X.hashValue ^ Y.hashValue
}
}
static func == (lhs: GridPoint, rhs: GridPoint) -> Bool { static func == (lhs: GridPoint, rhs: GridPoint) -> Bool {
return (lhs.X == rhs.X) && (lhs.Y == rhs.Y) return (lhs.X == rhs.X) && (lhs.Y == rhs.Y)