[xsd-users] Pointers to references

[Mathew Benson]

I found my problem.  For my attributes that were supposed to be references,
I kept them as a simpleType but added  "<restriction base="IDREF"/> to the
simpleType.  That enforced references had corresponding ID's, but it didn't
generate code that I expected.  It returned the simpleType.  I just set the
attribute type to IDREF directly, rather than use a custom attribute.  Now
it works.


On Sat, Mar 1, 2014 at 12:33 PM, Mathew Benson <mathew.benson at gmail.com>wrote:

> I already found that section, but to avoid confusion I tried to faithly
> perform the steps detailed in that section.  The sample code doesn't work
> for me out of the box, having problems just parsing the schema, compiling,
> and unmarshalling the xml.  Either I don't have my build environment setup
> correctly, or the sample code in the manual is really incomplete code
> snippets.  For the benefit of anybody else that finds this post, I'm
> attaching a tarball of my build project with a functioning example taken
> from section 2.5.5 of the manual.  I apologize if the attachment doesn't go
> through.  For a detailed example of what had failed and the changes
> required, build the code exactly as found in the manual and diff that with
> the example attached here.  The xsd command to generate the .cpp and .h
> file is:
>
> xsd cxx-tree --generate-serialization --generate-ostream --cxx-suffix .cpp
> --hxx-suffix .h --fwd-suffix -fwd.h test.xsd
>
> I couldn't get the second half of the example to compile.  Not that I
> don't think that it should matter, but I didn't know what function to call
> to unmarshall from a file and return a reference.  Any attempt to use
> "root_type&" like the example resulted in the following compiler error:
> ../src/XSDTest.cpp:18:43: error: invalid initialization of non-const
> reference of type 'test::root_type&' from an rvalue of type
> 'std::auto_ptr<test::root_type>
>
> I also got an error on the following line from the example:
>
> object_type& obj (*ref);
>
> ../src/XSDTest.cpp:20:25: error: invalid initialization of reference of
> type 'test::object_type&' from expression of type
> 'xsd::cxx::tree::idref<char, xsd::cxx::tree::ncname<char,
> xsd::cxx::tree::name<char, xsd::cxx::tree::token<char,
> xsd::cxx::tree::normalized_string<char, xsd::cxx::tree::string<char,
> xsd::cxx::tree::simple_type<xsd::cxx::tree::_type> > > > > >,
> xsd::cxx::tree::_type>::ref_type {aka xsd::cxx::tree::_type}'
>
> I would really like to get that second half of the example working so I
> don't have to cast.
>
> Lastly, using "root" as a variable name in the examples is probably not a
> good idea when the example xsd file results in a class also called "root".
>  Its a bit confusing.
>
>
> On Fri, Feb 28, 2014 at 11:19 PM, Boris Kolpackov <boris at codesynthesis.com
> > wrote:
>
>> Hi Mathew,
>>
>> Mathew Benson <mathew.benson at gmail.com> writes:
>>
>> > Could you tell me the best way to retrieve
>> > 'argumentTypeRef="IpAddressType"' given I have a pointer/reference to
>> the
>> > '<xtce:MetaCommand name="RCM_EnableOutput">' object?
>>
>> If you have an IDREF reference, then please read this section in the
>> manual, it explains how to use them:
>>
>> http://codesynthesis.com/projects/xsd/documentation/cxx/tree/manual/#2.5.5
>>
>> If something is still not clear, please specify what exactly (i.e., "I
>> tried foo and bar and biz did not work" instead of "tell me how to
>> do foo").
>>
>> Boris
>>
>
>