extern ctypedef integral <-> python object conversion (ticket #333)

Cython/Compiler/ExprNodes.py

@@ -3933,8 +3933,7 @@ class TypecastNode(NewTempExprNode):
         if from_py and not to_py and self.operand.is_ephemeral() and not self.type.is_numeric:
             error(self.pos, "Casting temporary Python object to non-numeric non-Python type")
         if to_py and not from_py:
-            if (self.operand.type.to_py_function and
-                    self.operand.type.create_to_py_utility_code(env)):
+            if self.operand.type.create_to_py_utility_code(env):
                 self.result_ctype = py_object_type
                 self.operand = self.operand.coerce_to_pyobject(env)
             else:
@@ -3942,7 +3941,7 @@ class TypecastNode(NewTempExprNode):
                     warning(self.pos, "No conversion from %s to %s, python object pointer used." % (self.operand.type, self.type))
                 self.operand = self.operand.coerce_to_simple(env)
         elif from_py and not to_py:
-            if self.type.from_py_function:
+            if self.type.create_from_py_utility_code(env):
                 self.operand = self.operand.coerce_to(self.type, env)
             elif self.type.is_ptr and not (self.type.base_type.is_void or self.type.base_type.is_struct):
                 error(self.pos, "Python objects cannot be casted to pointers of primitive types")

Cython/Compiler/Nodes.py

@@ -1964,8 +1964,9 @@ class DefNode(FuncDefNode):
             or self.starstar_arg is not None or has_kwonly_args
 
         for arg in self.args:
-            if not arg.type.is_pyobject and arg.type.from_py_function is None:
-                arg.type.create_from_py_utility_code(env)
+            if not arg.type.is_pyobject:
+                done = arg.type.create_from_py_utility_code(env)
+                if not done: pass # will fail later
 
         if not self.signature_has_generic_args():
             if has_star_or_kw_args:

tests/run/ctypedef_int_types_chdr_T333.h

+typedef signed   char  	    SChar;
+typedef unsigned char  	    UChar;
+typedef signed   short 	    SShort;
+typedef unsigned short 	    UShort;
+typedef signed   int   	    SInt;
+typedef unsigned int   	    UInt;
+typedef signed   long  	    SLong;
+typedef unsigned long  	    ULong;
+typedef signed   long long  SLongLong;
+typedef unsigned long long  ULongLong;

tests/run/ctypedef_int_types_defs_T333.pxd

+cdef extern from "ctypedef_int_types_chdr_T333.h":
+    ctypedef int SChar     ## "signed char"
+    ctypedef int UChar     ## "unsigned char"
+    ctypedef int SShort    ## "signed short"
+    ctypedef int UShort    ## "unsigned short"
+    ctypedef int SInt      ## "signed int"
+    ctypedef int UInt      ## "unsigned int"
+    ctypedef int SLong     ## "signed long"
+    ctypedef int ULong     ## "unsigned long"
+    ctypedef int SLongLong ## "signed PY_LONG_LONG"
+    ctypedef int ULongLong ## "unsigned PY_LONG_LONG"
+
+cdef extern from *:
+    ctypedef int ExtSInt "signed short"
+    ctypedef int ExtUInt "unsigned short"