[Cython] Defaults in cdef or cpdef methods

[Robert Bradshaw]

On Jun 19, 2008, at 11:35 AM, Johannes Wienke wrote:

> Am 06/19/2008 08:28 PM schrieb Robert Bradshaw:
>> On Jun 19, 2008, at 11:23 AM, Johannes Wienke wrote:
>>
>>> Am 06/19/2008 08:09 PM schrieb Robert Bradshaw:
>>>> On Jun 19, 2008, at 5:07 AM, Johannes Wienke wrote:
>>>>> is there a was to use default values for parameters in cdef or  
>>>>> cpdef
>>>>> methods? I observed that using them in the pxd files caused a  
>>>>> cython
>>>>> compiler error and using the only in the implementation causes a C
>>>>> compiler error.
>>>>
>>>> Yes, you need to declare them to have default parameters in .pxd  
>>>> files,
>>>> then can use them in .pyx files. For example:
>>>>
>>>> ---- pxd ----
>>>>
>>>> cdef foo(x, y=*)
>>>
>>> The compiler told me to use '?'. Is that a "bug" in the error  
>>> message?
>>
>> No, both are acceptable.
>
> Ok, then it didn't solve my problem. Jus tried that out and as both *
> and ? are possible, I got the same error message:
>
> build/temp.linux-x86_64-2.4/pyrex/plugins.c: In function 'PyObject*
> __pyx_pf_4ship_7icewing_7plugins_14PluginInstance_init(PyObject*,
> PyObject*, PyObject*)':
> build/temp.linux-x86_64-2.4/pyrex/plugins.c:1228: error: invalid  
> lvalue
> in unary '&'
> error: command 'x86_64-pc-linux-gnu-g++' failed with exit status 1
>
> My pxd file looks like that:
>
> cpdef class PluginInstance(Plugin):
> 	#....
> 	cpdef getName(self)
> 	cpdef init(self, args=*)
> 	cpdef process(self, d)
>
> And the method body:
>
>     cpdef init(self, args = ""):
>         argList = helpers.splitArgs(args)
>         # ...
>
> The line in the C code that gcc does complain about is:
>
> __pyx_1 = (__pyx_skip_dispatch = 1, ((struct
> __pyx_vtabstruct_4ship_7icewing_7plugins_PluginInstance *)((struct
> __pyx_obj_4ship_7icewing_7plugins_PluginInstance
> *)__pyx_v_self)->__pyx_vtab)->init(((struct
> __pyx_obj_4ship_7icewing_7plugins_PluginInstance *)__pyx_v_self),  
> ((void
> *)&((struct
> __pyx_opt_args_4ship_7icewing_7plugins_14PluginInstance_init) 
> {1,__pyx_v_args}))));
> if (unlikely(!__pyx_1)) {__pyx_filename = __pyx_f[0]; __pyx_lineno  
> = 93;
> goto __pyx_L1;}
>
> Is there something I am doing wrong?

Hmm... what version of gcc are you using?


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