Add support for `in parameters` in primary ctor of records

ICSharpCode.Decompiler.Tests/TestCases/Pretty/Records.cs

@@ -45,6 +45,7 @@ namespace ICSharpCode.Decompiler.Tests.TestCases.Pretty
 		public double C = 1.0;
 		public string D = A + B;
 	}
+	public record PrimaryCtorWithInParameter(in int A, in string B);
 	public record PrimaryCtorWithProperty(int A, string B)
 	{
 		public double C { get; init; } = 1.0;

ICSharpCode.Decompiler/CSharp/RecordDecompiler.cs

@@ -196,6 +196,11 @@ namespace ICSharpCode.Decompiler.CSharp
 						return false;
 					if (!target.MatchLdThis())
 						return false;
+					if (method.Parameters[i].IsIn)
+					{
+						if (!valueInst.MatchLdObj(out valueInst, out _))
+							return false;
+					}
 					if (!valueInst.MatchLdLoc(out var value))
 						return false;
 					if (!(value.Kind == VariableKind.Parameter && value.Index == i))
@@ -984,7 +989,10 @@ namespace ICSharpCode.Decompiler.CSharp
 				if (!deconstruct.IsOut)
 					return false;
 
-				if (!ctor.Type.Equals(((ByReferenceType)deconstruct.Type).ElementType))
+				IType ctorType = ctor.Type;
+				if (ctor.IsIn)
+					ctorType = ((ByReferenceType)ctorType).ElementType;
+				if (!ctorType.Equals(((ByReferenceType)deconstruct.Type).ElementType))
 					return false;
 
 				if (ctor.Name != deconstruct.Name)