Imported Upstream version 3.12.0

Former-commit-id: cf92446697332992ec36726e78eb8703e1f259d7

mcs/tests/test-primary-ctor-07.cs

@@ -1,3 +1,5 @@
+// Compiler options: -langversion:experimental
+
 using System;
 
 struct S (int x)
@@ -14,6 +16,21 @@ struct S (int x)
 	}
 }
 
+struct S2 (int arg)
+{
+	public readonly int v = arg;
+}
+
+struct S3 (string s = "arg")
+{
+	public readonly string V2 = s;
+
+	public S3 (int i, string s = "arg2")
+		: this (s)
+	{
+	}
+}
+
 class X
 {
 	public static int Main ()
@@ -24,6 +41,15 @@ class X
 		if (new S ('x').y != 1)
 			return 2;
 
+		if (new S2 (2).v != 2)
+			return 3;
+
+		if (new S3 ("x").V2 != "x")
+			return 4;
+
+		if (new S3 (0).V2 != "arg2")
+			return 5;
+
 		return 0;
 	}
 }