[Cython] Generated function has invalid name when converting from python object to C struct defined in C++ namespace

[Daniel Grunwald]

Hello,

I have Cython code like this:
     cdef extern from "cpp_library.h" namespace "CppLibrary":
         struct SomeStruct:
             int i

         void do_with_struct(SomeStruct s)

     def run():
         do_with_struct(object())

With cython 0.21.1, invalid C++ code is generated:
    struct CppLibrary::SomeStruct;
    static struct CppLibrary::SomeStruct 
__pyx_convert__from_py_CppLibrary::SomeStruct(PyObject *);

With cython master, a compiler error occurs:
     @cname("__pyx_convert__from_py_CppLibrary::SomeStruct")
     cdef SomeStruct __pyx_convert__from_py_CppLibrary::SomeStruct(obj) 
except *:
                                                      ^
     FromPyStructUtility:11:50: Expected an identifier or literal

Cython should mangle the struct name to ensure the helper function has a 
valid name.


Regards,

-- 
Daniel Grunwald
Axivion GmbH
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