Relax requirements for enums (fixes #294)

XmlSchemaClassGenerator/ModelBuilder.cs

@@ -624,19 +624,28 @@ private TypeModel CreateTypeModel(Uri source, XmlSchemaComplexType complexType,
  private TypeModel CreateTypeModel(XmlSchemaSimpleType simpleType, NamespaceModel namespaceModel, XmlQualifiedName qualifiedName, List<DocumentationModel> docs)
  {
  var restrictions = new List<RestrictionModel>();
+ var allBasesHaveEnums = true;
  List<XmlSchemaFacet> facets = new();
 
  if (simpleType.Content is XmlSchemaSimpleTypeRestriction typeRestriction)
+ {
  facets = typeRestriction.Facets.Cast<XmlSchemaFacet>().ToList();
+ }
  else if (simpleType.Content is XmlSchemaSimpleTypeUnion typeUnion
  && typeUnion.BaseMemberTypes.All(b => b.Content is XmlSchemaSimpleTypeRestriction r && r.Facets.Count > 0))
- facets = typeUnion.BaseMemberTypes.SelectMany(b => ((XmlSchemaSimpleTypeRestriction)b.Content).Facets.Cast<XmlSchemaFacet>()).ToList();
+ {
+ var baseFacets = typeUnion.BaseMemberTypes.Select(b => ((XmlSchemaSimpleTypeRestriction)b.Content).Facets.Cast<XmlSchemaFacet>()).ToList();
+ // if a union has enum restrictions, there must be an enum restriction in all parts of the union
+ allBasesHaveEnums = baseFacets.All(fs => fs.OfType<XmlSchemaEnumerationFacet>().Any());
+ facets = baseFacets.SelectMany(f => f).ToList();
+ }
 
  if (facets.Any())
  {
  var enumFacets = facets.OfType<XmlSchemaEnumerationFacet>().ToList();
  // If there are other restrictions mixed into the enumeration values, we'll generate a string to play it safe.
- var isEnum = enumFacets.Count > 0 && enumFacets.Count == facets.Count;
+ var isEnum = enumFacets.Any() && allBasesHaveEnums;
+
  if (isEnum)
  {
  // we got an enum