The following code demonstrates a problem discussed on https://groups.google.com/forum/?fromgroups#!forum/cython-users If one runs "cython --cplus ...." on this file the last function produces an error message.

gistfile1.py

cdef extern from "*":                                                                                                                                                                                                                                                
 3                                                                                                                                                                                                                                                                      
 4     cdef cppclass A:                                                                                                                                                                                                                                                 
 5         A()                                                                                                                                                                                                                                                          
 6         int fun(int)                                                                                                                                                                                                                                                 
 7         float fun(float)                                                                                                                                                                                                                                             
 8                                                                                                                                                                                                                                                                      
 9     cdef cppclass B(A):                                                                                                                                                                                                                                              
10         B()                                                                                                                                                                                                                                                          
11                                                                                                                                                                                                                                                                      
12     cdef cppclass C[X]:                                                                                                                                                                                                                                              
13         int fun(int)                                                                                                                                                                                                                                                 
14         float fun(float)                                                                                                                                                                                                                                             
15                                                                                                                                                                                                                                                                      
16     cdef cppclass D(C[int]):                                                                                                                                                                                                                                         
17         D()                                                                                                                                                                                                                                                          
18                                                                                                                                                                                                                                                                      
19                                                                                                                                                                                                                                                                      
20 # B inherits from class WITHOUT template parameters                                                                                                                                                                                                                  
21 cdef B  b                                                                                                                                                                                                                                                            
22 print b.fun(1)                                                                                                                                                                                                                                                       
23 print b.fun(1.0)                                                                                                                                                                                                                                                     
24                                                                                                                                                                                                                                                                      
25                                                                                                                                                                                                                                                                      
26 # D inherits from class WITH template parameters                                                                                                                                                                                                                     
27 cdef D d                                                                                                                                                                                                                                                             
28 print d.fun(1)                                                                                                                                                                                                                                                       
29 # complains:  "connot assign double to int"                                                                                                                                                                                                                          
30 print d.fun(1.1)