[mcs] Implements C# 7.2 readonly structs

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

diff --git a/mcs/mcs/field.cs b/mcs/mcs/field.cs
index da337a8261ab40ed86f89ad0d63b53e2aec3c2cc..86bb028defcb766e3d46d3ff6bed497962cb470b 100644 (file)
--- a/mcs/mcs/field.cs
+++ b/mcs/mcs/field.cs
@@ -700,6 +700,16 @@ namespace Mono.CSharp
                        return true;
                }
 
+               protected override void DoMemberTypeIndependentChecks ()
+               {
+                       if ((Parent.PartialContainer.ModFlags & Modifiers.READONLY) != 0 && (ModFlags & (Modifiers.READONLY | Modifiers.STATIC)) == 0) {
+                               Report.Error (8340, Location, "`{0}': Instance fields in readonly structs must be readonly",
+                                       GetSignatureForError ());
+                       }
+
+                       base.DoMemberTypeIndependentChecks ();
+               }
+
                protected override void DoMemberTypeDependentChecks ()
                {
                        if ((ModFlags & Modifiers.BACKING_FIELD) != 0)