Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/mscorlib/system/reflection/methodimplattributes.cs

@@ -0,0 +1,47 @@
+// ==++==
+// 
+//   Copyright (c) Microsoft Corporation.  All rights reserved.
+// 
+// ==--==
+// <OWNER>[....]</OWNER>
+// 
+
+namespace System.Reflection 
+{
+   
+    using System;
+    // This Enum matchs the CorMethodImpl defined in CorHdr.h
+    [Serializable]
+[System.Runtime.InteropServices.ComVisible(true)]
+    public enum MethodImplAttributes
+    {
+        // code impl mask
+        CodeTypeMask       =   0x0003,   // Flags about code type.   
+        IL                 =   0x0000,   // Method impl is IL.
+        Native             =   0x0001,   // Method impl is native.     
+        /// <internalonly/>
+        OPTIL              =   0x0002,   // Method impl is OPTIL 
+        Runtime            =   0x0003,   // Method impl is provided by the runtime.
+        // end code impl mask
+    
+        // managed mask
+        ManagedMask        =   0x0004,   // Flags specifying whether the code is managed or unmanaged.
+        Unmanaged          =   0x0004,   // Method impl is unmanaged, otherwise managed.
+        Managed            =   0x0000,   // Method impl is managed.
+        // end managed mask
+    
+        // implementation info and interop
+        ForwardRef         =   0x0010,   // Indicates method is not defined; used primarily in merge scenarios.
+        PreserveSig        =   0x0080,   // Indicates method sig is exported exactly as declared.
+
+        InternalCall       =   0x1000,   // Internal Call...
+    
+        Synchronized       =   0x0020,   // Method is single threaded through the body.
+        NoInlining         =   0x0008,   // Method may not be inlined.
+        [System.Runtime.InteropServices.ComVisible(false)]
+        AggressiveInlining =   0x0100,   // Method should be inlined if possible.
+        NoOptimization     =   0x0040,   // Method may not be optimized.
+
+        MaxMethodImplVal   =   0xFFFF,   // Range check value
+    }
+}