Moved CommandLookupKey to new file

Author: SeeminglyScience

Engine/CommandLookupKey.cs

@@ -0,0 +1,39 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+using System;
+using System.Management.Automation;
+
+namespace Microsoft.Windows.PowerShell.ScriptAnalyzer
+{
+    internal struct CommandLookupKey : IEquatable<CommandLookupKey>
+    {
+        private readonly string Name;
+
+        private readonly CommandTypes CommandTypes;
+
+        internal CommandLookupKey(string name, CommandTypes? commandTypes)
+        {
+            Name = name;
+            CommandTypes = commandTypes ?? CommandTypes.All;
+        }
+
+        public bool Equals(CommandLookupKey other)
+        {
+            return CommandTypes == other.CommandTypes
+                && Name.Equals(other.Name, StringComparison.OrdinalIgnoreCase);
+        }
+
+        public override int GetHashCode()
+        {
+            // Algorithm from https://stackoverflow.com/questions/1646807/quick-and-simple-hash-code-combinations
+            unchecked
+            {
+                int hash = 17;
+                hash = hash * 31 + Name.ToUpperInvariant().GetHashCode();
+                hash = hash * 31 + CommandTypes.GetHashCode();
+                return hash;
+            }
+        }
+    }
+}

Engine/Helper.cs

@@ -1912,37 +1912,6 @@ public Version GetPSVersion()
         }
 
 #endregion Methods
-
-        private struct CommandLookupKey : IEquatable<CommandLookupKey>
-        {
-            private readonly string Name;
-
-            private readonly CommandTypes CommandTypes;
-
-            internal CommandLookupKey(string name, CommandTypes? commandTypes)
-            {
-                Name = name;
-                CommandTypes = commandTypes ?? CommandTypes.All;
-            }
-
-            public bool Equals(CommandLookupKey other)
-            {
-                return CommandTypes == other.CommandTypes
-                    && Name.Equals(other.Name, StringComparison.OrdinalIgnoreCase);
-            }
-
-            public override int GetHashCode()
-            {
-                // Algorithm from https://stackoverflow.com/questions/1646807/quick-and-simple-hash-code-combinations
-                unchecked
-                {
-                    int hash = 17;
-                    hash = hash * 31 + Name.ToUpperInvariant().GetHashCode();
-                    hash = hash * 31 + CommandTypes.GetHashCode();
-                    return hash;
-                }
-            }
-        }
     }