Re: [pygccxml-development] templates (again)

[Allen B. <al...@vr...>]

Neal Becker wrote:

>On Thursday 31 August 2006 4:58 am, Matthias Baas wrote:
>  
>
>>Neal Becker wrote:
>>    
>>
>>>// file test.h
>>>#include <boost/numeric/ublas/vector.hpp>
>>>using namespace boost::numeric::ublas;
>>>
>>>typedef vector<int> vector_int;
>>>
>>># File: test_setup.py
>>>from pypp_api import *
>>>
>>>mod = ModuleBuilder(
>>>    headerFiles = "test.h",
>>>    moduleName = "test"
>>>)
>>>
>>>root = mod.parse()
>>>root.Class("vector_int").expose()
>>>
>>>mod.writeModule()
>>>
>>>result:
>>>[...]
>>>    raise RuntimeError, "Query produced no results (filter: %s)"%filter
>>>RuntimeError: Query produced no results (filter: (name=='vector_int') &
>>>(type==CLASS) & (parent=='::'))
>>>      
>>>
>>Well, I have never wrapped templates so far. This part of pypp_api was
>>written by Allen. You are not using the Template() method, so I don't
>>know if this could already work or not. Or maybe the result is empty
>>because you are actually querying for a typedef instead of a class...?
>>Try Decl() instead of Class():
>>
>>root.Decl("vector_int").expose()
>>
>>    
>>
I think the problem you are running into is that the decl for the 
typedef is really just a reference to the real type.

You have to do a little more processing to get to the full type.

The code that I am using right now is in the TemplateBuilder and 
TemplateWrapper classes in the goodies contrib:

http://svn.sourceforge.net/viewvc/pygccxml/pyplusplus_dev/contrib/goodies/goodie_utils.py?revision=500&view=markup

To use this code you would do something like this:

    tb = TemplateBuilder()
    vec3f_t = tb.Template("osg::vector<float,3>")

    # Add autogen code to a header that is included in myheaders list
    # using tb.buildAutogenContents() which returns the text that needs
    # processed
    mb = moduble_builder_t([myheaders], ...)
    tb.process(mb)
 
    vec3f = vec3f_t.decl
    vec3f.method("getSize").exclude()

    mb.builde_code_creator(...)


I am not sure if you will want to use this helper class directly, but it 
should at least show you all the steps involved in getting templates 
wrapped.

-Allen


>>    
>>
>
>OK.  This time no error, but no code generated either!
>// This file has been generated by Py++.
>
>#include "boost/python.hpp"
>
>#include "test.h"
>
>namespace bp = boost::python;
>
>BOOST_PYTHON_MODULE(test){
>
>}
>---test.h
>#include <boost/numeric/ublas/vector.hpp>
>typedef boost::numeric::ublas::vector<int> vector_int;
>
>inline void instantiate() {
>  sizeof (vector_int);
>}
>
># File: pypp_setup.py
>
>from pypp_api import *
>
>mod = ModuleBuilder(
>    headerFiles = "test.h",
>    moduleName = "test"
>)
>
>root = mod.parse()
>root.Decl("vector_int").expose()
>
>mod.writeModule()
>
>
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