[mcs] Implements C# 7.2 readonly structs

[mono.git] / mcs / mcs / class.cs

diff --git a/mcs/mcs/class.cs b/mcs/mcs/class.cs
index 07bf45f12ef73f8e0a8527053f96bb599948793e..9afb32c6fe5677d71cdd7632d08c79a43302e040 100644 (file)
--- a/mcs/mcs/class.cs
+++ b/mcs/mcs/class.cs
@@ -3022,7 +3022,8 @@ namespace Mono.CSharp
                        Modifiers.PROTECTED |
                        Modifiers.INTERNAL  |
                        Modifiers.UNSAFE    |
-                       Modifiers.PRIVATE;
+                       Modifiers.PRIVATE   |
+                       Modifiers.READONLY;
 
                public Struct (TypeContainer parent, MemberName name, Modifiers mod, Attributes attrs)
                        : base (parent, name, attrs, MemberKind.Struct)
@@ -3135,6 +3136,9 @@ namespace Mono.CSharp
 
                public override void Emit ()
                {
+                       if ((ModFlags & Modifiers.READONLY) != 0)
+                               Module.PredefinedAttributes.IsReadOnly.EmitAttribute (TypeBuilder);
+
                        CheckStructCycles ();
 
                        base.Emit ();