fix to ignore IsReadOnlyAttribute on methods and event accessors

Author: smdn

src/Smdn.Reflection.ReverseGenerating.ListApi.Core/Smdn.Reflection.ReverseGenerating.ListApi/AttributeFilter.cs

@@ -30,7 +30,7 @@ private static bool DefaultImpl(Type attrType, ICustomAttributeProvider attrProv
       if ("IsReadOnlyAttribute".Equals(attrType.Name, StringComparison.Ordinal)) {
         var ignore = attrProvider switch {
           Type => true,
-          MethodInfo m => m.IsPropertyAccessorMethod(),
+          MethodInfo => true, // also ignores event and property accessors
           ParameterInfo => true,
           _ => false,
         };

tests/Smdn.Reflection.ReverseGenerating.ListApi.Core/Smdn.Reflection.ReverseGenerating.ListApi/AttributeFilter.TestCases.cs

@@ -129,6 +129,16 @@ public class AsyncStateMachineAttr {
     [MemberAttributeFilterTestCaseAttribute("", FilterType = typeof(AttributeFilter), FilterMemberName = nameof(AttributeFilter.Default))]
     public async ValueTask ValueTaskAsyncStateMachineMethod() => await Task.Delay(0);
   }
+
+  public struct IsReadOnlyAttr : IDisposable {
+    [MemberAttributeFilterTestCaseAttribute("[IsReadOnly]")]
+    [MemberAttributeFilterTestCaseAttribute("", FilterType = typeof(AttributeFilter), FilterMemberName = nameof(AttributeFilter.Default))]
+    public readonly void M() => throw null;
+
+    [MemberAttributeFilterTestCaseAttribute("[IsReadOnly]")]
+    [MemberAttributeFilterTestCaseAttribute("", FilterType = typeof(AttributeFilter), FilterMemberName = nameof(AttributeFilter.Default))]
+    readonly void IDisposable.Dispose() => throw null;
+  }
 }
 
 public class FieldAttributes {
@@ -217,6 +227,17 @@ public event EventHandler E {
     public event EventHandler ECompilerGenerated;
 #pragma warning restore CS0067
   }
+
+  public struct IsReadOnlyAttr {
+    public readonly event EventHandler E {
+      [MemberAttributeFilterTestCaseAttribute("[IsReadOnly]")]
+      [MemberAttributeFilterTestCaseAttribute("", FilterType = typeof(AttributeFilter), FilterMemberName = nameof(AttributeFilter.Default))]
+      add => throw null;
+      [MemberAttributeFilterTestCaseAttribute("[IsReadOnly]")]
+      [MemberAttributeFilterTestCaseAttribute("", FilterType = typeof(AttributeFilter), FilterMemberName = nameof(AttributeFilter.Default))]
+      remove => throw null;
+    }
+  }
 }
 
 public class ParameterAttributes {