Hello,
I have a problem wrapping the following header file using Py++. The class
"Derived<T>" defines a local typedef "Helper" which has different meanings for
each template parameter "T".
Wrapped header:
---------- test.h ----------
#ifndef TEST_H
#define TEST_H
template<class T> class Base{
public:
};
template<class T> class Derived: public Base<T>{
public:
typedef Base<T> Helper;
};
#ifdef __GCCXML__
void instantiate(){
sizeof(Base<int>);
sizeof(Base<float>);
sizeof(Derived<int>);
sizeof(Derived<float>);
}
#endif
#endif
---------- end of test.h ----------
This leads to the error (full output log at the end of this email):
RuntimeError: `Py++` is going to write different content to the same
file(split/Helper.pypp.hpp).
The following is a short list of possible explanations for this behaviour:
* `Py++` bug, in this case, please report it
* module_builder_t contains two or more classes with the same alias
* module_builder_t contains two or more classes with the same wrapper alias
Please carefully review `Py++` warning messages. It should contain an
additional information.
I tried to rename or exclude the "Helper" class from the wrapper, but the
problem is, that it is not even in mb.classes():
>print [c.name for c in mb.classes()]
['Derived<float>', 'Derived<int>', 'Base<float>', 'Base<int>']
Is there a possibility to
- rename the different Helpers to "HelperInt" and "HelperFloat" in the code
generator or
- apply minor changes to the header only for GCCXML, but without changing the
classes (they are simplified from a bigger project!)
- or to exclude the Helper class?
I hope someone can suggest a solution or a workaround.
Thank you
Razvan
Code generator:
---------- generate_code.py ----------
import os
from pyplusplus import module_builder
from pyplusplus.decl_wrappers import call_policies
from pygccxml.declarations.matchers import access_type_matcher_t
from pyplusplus import function_transformers as FT
files=['test.H']
mb = module_builder.module_builder_t(
files=files,
define_symbols=[],
include_paths=[]
)
mb.build_code_creator( module_name='pytest' )
mb.code_creator.user_defined_directories.append( os.path.abspath('.') )
mb.split_module("split")
mb.write_module( os.path.join( os.path.abspath('.'), 'generated.cpp' ) )
---------- end of generate_code.py ----------
---------- complete ouput ----------
$ python generate_code.py
INFO Parsing source file "test.H" ...
INFO gccxml cmd: /usr/local/bin/gccxml -I"." "test.H"
-fxml="/tmp/tmpM2O_z-.xml"
INFO GCCXML version - 0.9( 1.128 )
WARNING: Base<float> [class]
> warning W1047: There are two or more classes that use same alias("Helper").
> Duplicated aliases causes few problems, but the main one is that some
> of the classes will not be exposed to Python.Other classes : Base<int> [class]
WARNING: Base<int> [class]
> warning W1047: There are two or more classes that use same alias("Helper").
> Duplicated aliases causes few problems, but the main one is that some
> of the classes will not be exposed to Python.Other classes : Base<float>
> [class]
Traceback (most recent call last):
File "generate_code.py", line 20, in <module>
mb.split_module("split")
File
"/usr/lib/python2.5/site-packages/pyplusplus/module_builder/boost_python_builder.py",
line 373, in split_module
, encoding=self.encoding)
File "/usr/lib/python2.5/site-packages/pyplusplus/file_writers/__init__.py",
line 37, in write_multiple_files
mfs.write()
File
"/usr/lib/python2.5/site-packages/pyplusplus/file_writers/multiple_files.py",
line 406, in write
self.split_classes()
File
"/usr/lib/python2.5/site-packages/pyplusplus/file_writers/multiple_files.py",
line 307, in split_classes
map( self.split_class, class_creators )
File
"/usr/lib/python2.5/site-packages/pyplusplus/file_writers/multiple_files.py",
line 294, in split_class
self.split_class_impl( class_creator )
File
"/usr/lib/python2.5/site-packages/pyplusplus/file_writers/multiple_files.py",
line 268, in split_class_impl
, self.create_function_code( function_name ) ) )
File
"/usr/lib/python2.5/site-packages/pyplusplus/file_writers/multiple_files.py",
line 58, in write_file
raise RuntimeError( os.linesep.join(msg) )
RuntimeError: `Py++` is going to write different content to the same
file(split/Helper.pypp.hpp).
The following is a short list of possible explanations for this behaviour:
* `Py++` bug, in this case, please report it
* module_builder_t contains two or more classes with the same alias
* module_builder_t contains two or more classes with the same wrapper alias
Please carefully review `Py++` warning messages. It should contain an
additional information.
---------- end of output----------
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