Support readonly members for struct (#609)

* Support readonly members for struct

* update

3 files changed, 26 insertions, 1 deletions

diff --git a/mdoc/Mono.Documentation/Updater/Formatters/CSharpFullMemberFormatter.cs b/mdoc/Mono.Documentation/Updater/Formatters/CSharpFullMemberFormatter.cs
index ff280834..4f4f287a 100644
--- a/mdoc/Mono.Documentation/Updater/Formatters/CSharpFullMemberFormatter.cs
+++ b/mdoc/Mono.Documentation/Updater/Formatters/CSharpFullMemberFormatter.cs
@@ -503,12 +503,16 @@ namespace Mono.Documentation.Updater.Formatters
         {
             string modifiers = String.Empty;
             if (method.IsStatic) modifiers += " static";
+            TypeDefinition declType = (TypeDefinition)method.DeclaringType;
+            if (declType.IsValueType && DocUtils.HasCustomAttribute(method, Consts.IsReadOnlyAttribute))
+            {
+                modifiers += " readonly";
+            }
             if (method.IsVirtual && !method.IsAbstract)
             {
                 if ((method.Attributes & MethodAttributes.NewSlot) != 0) modifiers += " virtual";
                 else modifiers += " override";
             }
-            TypeDefinition declType = (TypeDefinition)method.DeclaringType;
             if (method.IsAbstract && !declType.IsInterface) modifiers += " abstract";
             if (method.IsFinal) modifiers += " sealed";
             if (modifiers == " virtual sealed") modifiers = "";
diff --git a/mdoc/mdoc.Test/FormatterTests.cs b/mdoc/mdoc.Test/FormatterTests.cs
index ace21a6a..f33177e7 100644
--- a/mdoc/mdoc.Test/FormatterTests.cs
+++ b/mdoc/mdoc.Test/FormatterTests.cs
@@ -403,6 +403,14 @@ namespace mdoc.Test
             Assert.AreEqual("public readonly ref struct ReadOnlyRefStruct", typeSignature);
         }
 
+        [Test]
+        public void CSharpReadOnlyMemberStructTest()
+        {
+            var method = GetMethod(typeof(SampleClasses.StructWithReadOnlyMethod), m => m.Name == "Sum");
+            var methodSignature = formatter.GetDeclaration(method);
+            Assert.AreEqual("public readonly double Sum ();", methodSignature);
+        }
+
         #region Helper Methods
         string RealTypeName(string name){
             switch (name) {
diff --git a/mdoc/mdoc.Test/SampleClasses/StructWithReadOnlyMethod.cs b/mdoc/mdoc.Test/SampleClasses/StructWithReadOnlyMethod.cs
new file mode 100644
index 00000000..baf8f7af
--- /dev/null
+++ b/mdoc/mdoc.Test/SampleClasses/StructWithReadOnlyMethod.cs
@@ -0,0 +1,13 @@
+namespace mdoc.Test.SampleClasses
+{
+    public struct StructWithReadOnlyMethod
+    {
+        public double X { get; set; }
+        public double Y { get; set; }
+
+        public readonly double Sum()
+        {
+            return X + Y;
+        }
+    }
+}