Add init to ReseedingRandomGenerator using default

Uses default instance of DeviceRandom and ARC4Random. This is the common (and only in the case of ARC4Random) way to use these generators. So it makes sense that when initializing without a specified reseeder, these values are used.
nvzqz · Mar 24, 2017 · da57645 · da57645
1 parent a7d1b9b
commit da57645
Showing 1 changed file with 20 additions and 0 deletions.
diff --git a/Sources/RandomKit/Types/RandomGenerator/ReseedingRandomGenerator.swift b/Sources/RandomKit/Types/RandomGenerator/ReseedingRandomGenerator.swift
@@ -78,6 +78,26 @@ extension ReseedingRandomGenerator where Reseeder: SeedableFromOtherRandomGenera
 
 }
 
+#if swift(>=3.1)
+extension ReseedingRandomGenerator where Reseeder == DeviceRandom {
+
+    /// Creates an instance with `threshold` by instantiating `base` from `DeviceRandom.default`.
+    public init(threshold: Int = Base.reseedingThreshold) {
+        self.init(reseeder: .default, threshold: threshold)
+    }
+
+}
+
+extension ReseedingRandomGenerator where Reseeder == ARC4Random {
+
+    /// Creates an instance with `threshold` by instantiating `base` from `ARC4Random.default`.
+    public init(threshold: Int = Base.reseedingThreshold) {
+        self.init(reseeder: .default, threshold: threshold)
+    }
+
+}
+#endif
+
 extension Int {
     @inline(__always)
     fileprivate func _saturatingAddPositive(_ other: Int) -> Int {