Re-re-instate 908, everything should work now

Cython/Compiler/Nodes.py

@@ -362,8 +362,12 @@ class CNameDeclaratorNode(CDeclaratorNode):
     
     def analyse(self, base_type, env, nonempty = 0):
         if nonempty and self.name == '':
-            # Must have mistaken the name for the type. 
-            self.name = base_type.name
+            # May have mistaken the name for the type. 
+            if base_type.is_ptr or base_type.is_array or base_type.is_buffer:
+                error(self.pos, "Missing argument name")
+            elif base_type.is_void:
+                error(self.pos, "Use spam() rather than spam(void) to declare a function with no arguments.")
+            self.name = base_type.declaration_code("", for_display=1, pyrex=1)
             base_type = py_object_type
         self.type = base_type
         return self, base_type
@@ -422,6 +426,8 @@ class CFuncDeclaratorNode(CDeclaratorNode):
     optional_arg_count = 0
 
     def analyse(self, return_type, env, nonempty = 0):
+        if nonempty:
+            nonempty -= 1
         func_type_args = []
         for arg_node in self.args:
             name_declarator, type = arg_node.analyse(env, nonempty = nonempty)
@@ -1052,7 +1058,8 @@ class CFuncDefNode(FuncDefNode):
         
     def analyse_declarations(self, env):
         base_type = self.base_type.analyse(env)
-        name_declarator, type = self.declarator.analyse(base_type, env, self.body is not None)
+        # The 2 here is because we need both function and argument names. 
+        name_declarator, type = self.declarator.analyse(base_type, env, nonempty = 2 * (self.body is not None))
         if not type.is_cfunction:
             error(self.pos, 
                 "Suite attached to non-function declaration")

Cython/Compiler/PyrexTypes.py

@@ -287,6 +287,13 @@ class BuiltinObjectType(PyObjectType):
     def type_test_code(self, arg):
         return 'likely(Py%s_CheckExact(%s)) || (%s) == Py_None || (PyErr_Format(PyExc_TypeError, "Expected %s, got %%s", Py_TYPE(%s)->tp_name), 0)' % (self.name[0].upper() + self.name[1:], arg, arg, self.name, arg)
 
+    def declaration_code(self, entity_code, 
+            for_display = 0, dll_linkage = None, pyrex = 0):
+        if pyrex or for_display:
+            return self.base_declaration_code(self.name, entity_code)
+        else:
+            return "%s *%s" % (public_decl("PyObject", dll_linkage), entity_code)
+
 
 class PyExtensionType(PyObjectType):
     #

tests/compile/cargdef.pyx

 def f(obj, int i, float f, char *s1, char s2[]):
     pass
     
+cdef g(obj, int i, float f, char *s1, char s2[]):
+    pass
+    
+cdef do_g(object (*func)(object, int, float, char*, char*)):
+    return func(1, 2, 3.14159, "a", "b")
+    
+do_g(&g)