sagex enum issue and solution

[williamstein]

The following code compiled just fine with 0.9.4.1
 
cdef extern from "whatever.h":
    ctypedef enum someenum_t:
        ENUMVALUE_1
        ENUMVALUE_2
 
cdef somefunction(someenum_t val):
    if val == ENUMVALUE_1:
        print "1"
    else:
        print "2"
 
 
With 0.9.5 it gives the following error:
/tmp/Pyrex-0.9.5/regression.pyx:8:11: Invalid types for '=='
(someenum_t, someenum_t)
 
 
 anders
 
 
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--------

I wrote:
> /tmp/Pyrex-0.9.5/regression.pyx:8:11: Invalid types for '=='
> (someenum_t, someenum_t)
 
This patch seems to help, but I don't know enough pyrex internals to
tell if it is the correct solution.
 
--- Pyrex-0.9.5/Pyrex/Compiler/ExprNodes.py     2007-01-27
05:21:03.000000000 +0100
+++ Pyrex-0.9.5-enumcmpfix/Pyrex/Compiler/ExprNodes.py  2007-01-28
16:14:45.366599915 +0100
@@ -2594,6 +2594,8 @@
         elif (type1.is_numeric and type2.is_numeric
                 and op not in ('is', 'is_not')):
             return 1
+        elif (type1.is_enum and type2.is_enum):
+            return 1
         else:
             return 0
 
 
 
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Component: packages: standard

Issue created by migration from https://trac.sagemath.org/ticket/226

[sagetrac-mabshoff]

comment:1

The problem has been fixed in a previous release of cython.
cython regression.pyx now works fine.