[xsd-users] Changes in xsd:choice from 1.3.0 to 1.8.0 ?

[Boris Kolpackov]

Filipe,

Filipe Dias <fil at immi.inesc-id.pt> writes:

> I made some code using XSD in verstion 1.3.0 to read the following portion
> of schema:
>
> <xsd:complexType name="GidesGeometry_t">
> <xsd:sequence>
>  <xsd:element name="event" type="event_t" />
>  <xsd:choice maxOccurs="1" minOccurs="1">
>      <xsd:element name="reference" type="GidesReference_t" />
>      <xsd:element name="shape" type="GidesShape_t" />
>      <xsd:element name="transformation" type="GidesTransformation_t" />
>      <xsd:element name="operation" type="GidesOperation_t" />
>  </xsd:choice>
> </xsd:sequence>
> </xsd:complexType>
>
> The C++ code I was using is:
>
> bool ReadXSD(GidesGeometry_t *ggeom_data){
> if(ggeom_data->shape.present())
>   _s = ggeom_data->shape();
> ...
> }
>
> In version 1.3.0, that 3rd line of code returned an object of type
> "GidesShape_t"

This has changed in 1.4.0 which was announced here:

http://codesynthesis.com/pipermail/xsd-users/2005-October/000054.html

If you are interested in motivation for this change, you can check
this message:

http://codesynthesis.com/pipermail/xsd-users/2005-September/000041.html


> Now, in version 1.8.0, it returns: "GidesShape_t::shape::container"
>
> How do I reach the GidesShape_t object in version 1.8.0?

You can write it like this:

if(ggeom_data->shape().present())
  _s = ggeom_data->shape().get ();

or, using pointer notation,

if(ggeom_data->shape())
  _s = *ggeom_data->shape();

or, if you don't want to call ggeom_data->shape() twice,

if(GidesShape_t::shape::container s = ggeom_data->shape())
  _s = *s;


hth,
-boris
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