Refactor enums

src/Umbraco.Core/EnumExtensions.cs

@@ -0,0 +1,45 @@
+using System;
+
+namespace Umbraco.Core
+{
+    /// <summary>
+    /// Provides extension methods to enums.
+    /// </summary>
+    public static class EnumExtensions
+    {
+        // note:
+        // - no need to HasFlagExact, that's basically an == test
+        // - HasFlagAll cannot be named HasFlag because ext. methods never take priority over instance methods
+
+        /// <summary>
+        /// Determines whether a flag enum has all the specified values.
+        /// </summary>
+        /// <remarks>
+        /// <para>True when all bits set in <paramref name="uses"/> are set in <paramref name="use"/>, though other bits may be set too.</para>
+        /// <para>This is the behavior of the original <see cref="Enum.HasFlag"/> method.</para>
+        /// </remarks>
+        public static bool HasFlagAll<T>(this T use, T uses)
+            where T : Enum
+        {
+            var num = Convert.ToUInt64(use);
+            var nums = Convert.ToUInt64(uses);
+
+            return (num & nums) == nums;
+        }
+
+        /// <summary>
+        /// Determines whether a flag enum has any of the specified values.
+        /// </summary>
+        /// <remarks>
+        /// <para>True when at least one of the bits set in <paramref name="uses"/> is set in <paramref name="use"/>.</para>
+        /// </remarks>
+        public static bool HasFlagAny<T>(this T use, T uses)
+            where T : Enum
+        {
+            var num = Convert.ToUInt64(use);
+            var nums = Convert.ToUInt64(uses);
+
+            return (num & nums) > 0;
+        }
+    }
+}