Implemented Comparable on, and added initializer to, NSOperatingSystemVersion

Author: rsmoz

Foundation/NSProcessInfo.swift

@@ -31,6 +31,25 @@ public struct NSOperatingSystemVersion {
     }
 }
 
+extension NSOperatingSystemVersion : Comparable {
+    public init(_ majorVersion: Int, _ minorVersion: Int, _ patchVersion: Int) {
+        self.init(majorVersion: majorVersion, minorVersion: minorVersion, patchVersion: patchVersion)
+    }
+}
+
+public func ==(lhs: NSOperatingSystemVersion, rhs: NSOperatingSystemVersion) -> Bool {
+    let lhsTuple = (lhs.majorVersion, lhs.minorVersion, lhs.patchVersion)
+    let rhsTuple = (rhs.majorVersion, rhs.minorVersion, rhs.patchVersion)
+    
+    return lhsTuple == rhsTuple
+}
+
+public func <(lhs: NSOperatingSystemVersion, rhs: NSOperatingSystemVersion) -> Bool {
+    let lhsTuple = (lhs.majorVersion, lhs.minorVersion, lhs.patchVersion)
+    let rhsTuple = (rhs.majorVersion, rhs.minorVersion, rhs.patchVersion)
+    
+    return lhsTuple < rhsTuple
+}
 
 
 public class NSProcessInfo : NSObject {
@@ -123,26 +142,7 @@ public class NSProcessInfo : NSObject {
     }
 
     public func isOperatingSystemAtLeastVersion(version: NSOperatingSystemVersion) -> Bool {
-        let ourVersion = operatingSystemVersion
-        if ourVersion.majorVersion < version.majorVersion {
-            return false
-        }
-        if ourVersion.majorVersion > version.majorVersion {
-            return true
-        }
-        if ourVersion.minorVersion < version.minorVersion {
-            return false
-        }
-        if ourVersion.minorVersion > version.minorVersion {
-            return true
-        }
-        if ourVersion.patchVersion < version.patchVersion {
-            return false
-        }
-        if ourVersion.patchVersion > version.patchVersion {
-            return true
-        }
-        return true
+        return operatingSystemVersion >= version
     }
 
     public var systemUptime: NSTimeInterval {