Fix bug in IsValueType (SamboyCoding#476)

Author: ds5678

Cpp2IL.Core/Model/Contexts/TypeAnalysisContext.cs

@@ -340,7 +340,20 @@ public static ITypeInfoProvider GetSndnProviderForType(ApplicationAnalysisContex
  string ITypeInfoProvider.RewrittenTypeName => Name;
  string ITypeInfoProvider.TypeNamespace => Namespace;
  public virtual bool IsGenericInstance => false;
- public virtual bool IsValueType => Definition?.IsValueType ?? BaseType is { Namespace: "System", Name: "ValueType" };
+ public virtual bool IsValueType
+ {
+ get
+ {
+ if (Definition is not null)
+ return Definition.IsValueType;
+
+ if (BaseType is { Namespace: "System", Name: "ValueType" })
+ return Namespace is not "System" || Name is not "Enum"; // Enum is a reference type
+
+ return IsEnumType;
+ }
+ }
+
  public bool IsEnumType => Definition?.IsEnumType ?? BaseType is { Namespace: "System", Name: "Enum" };
  IEnumerable<ITypeInfoProvider> ITypeInfoProvider.GenericArgumentInfoProviders => [];
  IEnumerable<IFieldInfoProvider> ITypeInfoProvider.FieldInfoProviders => Fields;