[xsd-users] Restricted NMTOKENS (enumeration) with default value

[Andre Vautour]

I ran into a problem with a schema that has an enumeration (xsd:NMTOKENS 
with restrictions) that has a default value. The generated enum does not 
seem to have a default constructor, yet the generated default 
initialization method tries to use the default constructor. I am using 
xsd 4.0.0 on Windows.

Here is a simplified schema that shows the problem:

<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
     <xsd:attribute name="colour" default="red">
         <xsd:simpleType>
             <xsd:restriction base="xsd:NMTOKENS">
                 <xsd:enumeration value="red"/>
                 <xsd:enumeration value="green"/>
                 <xsd:enumeration value="blue"/>
             </xsd:restriction>
         </xsd:simpleType>
     </xsd:attribute>
     <xsd:complexType name="ValueType">
         <xsd:sequence/>
         <xsd:attribute ref="colour" use="optional"/>
     </xsd:complexType>
     <xsd:element name="Value" type="ValueType"></xsd:element>
</xsd:schema>

The command-line:
xsd cxx-tree schema.xsd

Generated code has the following method:

static ValueType::colour_type
_xsd_ValueTypecolour_default_value_init ()
{
   ValueType::colour_type r;//< This uses the default constructor and 
results in a compilation error.

   {
     ::xml_schema::nmtoken tmp ("red");
     r.push_back (tmp);
   }

   return r;
};

Yet, the generated colour_type does not have a default constructor:
colour (const ::xml_schema::nmtokens& v);

I ran into this particular problem when trying to generate OGC's OWS 
1.1.0 schema, see the rangeClosure attribute of RangeType:
http://schemas.opengis.net/ows/1.1.0/owsDomainType.xsd

Thoughts?
André