[Cython] Problem with declaring a map with an enum type.

[Robert Bradshaw]

On Thu, Jul 16, 2015 at 2:13 PM, Brian McAndrews
<Brian.McAndrews at chicagotrading.com> wrote:
> I have a C enum type that I’m attempting to put in a C++ map:

Interesting, thanks for the report. Fixed at
https://github.com/cython/cython/commit/427771298da04f0f5bb61659ddf4a61bd0f02af4

> Here’s what I got:
>
>
>
> colors.h:
>
> enum Color
>
>   {
>
>     GREEN,BLUE,RED
>
>   };
>
>
>
> val.pyx:
>
> from libcpp.string cimport string
>
> from libcpp.map cimport map
>
>
>
> cdef extern from "colors.h":
>
>     cpdef enum _Color "Color":
>
>        GREEN,BLUE,RED
>
>
>
> cdef class TestMe:
>
>     cdef public map[string, _Color] vals
>
>
>
>
>
> I get a compile error (VSC++ 2012)
>
> VAL.cpp(1239) : error C2440: '=' : cannot convert from 'long' to 'Color'
>
>         Conversion to enumeration type requires an explicit cast
> (static_cast, C-style cast or function-style cast)
>
>
>
> The offending statement is this:
>
>     __pyx_t_9 = PyInt_AsLong(__pyx_v_value); if (unlikely(PyErr_Occurred()))
> {__pyx_filename = __pyx_f[1]; __pyx_lineno = 202; __pyx_clineno = __LINE__;
> goto __pyx_L1_error;}
>
>
>
> In the __pyx_convert_map_from_py_std_3a__3a_string__and_enum__Color
> function.
>
>
>
> The cast from PyInt_AsLong(…) to an enum Color is not specified when using
> maps.
>
>
>
> If I don’t put it in a map (just as a member variable), the cast is
> performed.
>
>
>
> Has anyone seen this before?
>
>
>
> Thanks,
>
> Brian
>
>
>
>
>
>
>
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