Revert "Limited API updates and cleanup for #2056. GH-3635)"

This reverts commit 02bb311d.

Cython/Compiler/ModuleNode.py

@@ -1899,47 +1899,35 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
 
     def generate_binop_function(self, scope, slot, code):
         func_name = scope.mangle_internal(slot.slot_name)
-        if scope.directives['c_api_binop_methods']:
-            code.putln('#define %s %s' % (func_name, slot.left_slot.slot_code(scope)))
-            return
-        else:
-            error(self.pos,
-                  "The 'c_api_binop_methods' directive is only supported for forward compatibility"
-                  " and must be True.")
-
         code.putln()
         preprocessor_guard = slot.preprocessor_guard_code()
         if preprocessor_guard:
             code.putln(preprocessor_guard)
-
+        if scope.directives['c_api_binop_methods']:
+            code.putln('#define %s %s' % (func_name, slot.left_slot.slot_code(scope)))
+        else:
             if slot.left_slot.signature == TypeSlots.binaryfunc:
-            slot_type = 'binaryfunc'
                 extra_arg = extra_arg_decl = ''
             elif slot.left_slot.signature == TypeSlots.ternaryfunc:
-            slot_type = 'ternaryfunc'
                 extra_arg = ', extra_arg'
                 extra_arg_decl = ', PyObject* extra_arg'
             else:
                 error(entry.pos, "Unexpected type lost signature: %s" % slot)
-
             def has_slot_method(method_name):
                 entry = scope.lookup(method_name)
                 return bool(entry and entry.is_special and entry.func_cname)
             def call_slot_method(method_name, reverse):
                 entry = scope.lookup(method_name)
                 if entry and entry.is_special and entry.func_cname:
-                return "%s(%s%s)" % (
-                    entry.func_cname,
-                    "right, left" if reverse else "left, right",
-                    extra_arg)
+                    return "%s(%s%s)" % (entry.func_cname, "right, left" if reverse else "left, right", extra_arg)
                 else:
-                return '%s_maybe_call_slot(%s, left, right %s)' % (
-                    func_name,
-                    'Py_TYPE(right)->tp_base' if reverse else 'Py_TYPE(left)->tp_base',
-                    extra_arg)
-
+                    super = 'Py_TYPE(right)->tp_base' if reverse else 'Py_TYPE(left)->tp_base'
+                    return ('(%s->tp_as_number && %s->tp_as_number->%s)'
+                            ' ? %s->tp_as_number->%s(left, right %s)'
+                            ' : (Py_INCREF(Py_NotImplemented), Py_NotImplemented)') % (
+                        super, super, slot.slot_name, super, slot.slot_name, extra_arg)
             code.putln(
-            TempitaUtilityCode.load_as_string(
+                TempitaUtilityCode.load_cached(
                     "BinopSlot", "ExtensionTypes.c",
                     context={
                         "func_name": func_name,
@@ -1948,10 +1936,10 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
                         "call_left": call_slot_method(slot.left_slot.method_name, reverse=False),
                         "call_right": call_slot_method(slot.right_slot.method_name, reverse=True),
                         "type_cname": scope.parent_type.typeptr_cname,
-                    "slot_type": slot_type,
                         "extra_arg": extra_arg,
                         "extra_arg_decl": extra_arg_decl,
-                    })[1])
+                        }).impl.strip())
+            code.putln()
         if preprocessor_guard:
             code.putln("#endif")
 

Cython/Utility/ExtensionTypes.c

@@ -281,39 +281,24 @@ __PYX_GOOD:
 
 /////////////// BinopSlot ///////////////
 
-static CYTHON_INLINE PyObject *{{func_name}}_maybe_call_slot(PyTypeObject* type, PyObject *left, PyObject *right {{extra_arg_decl}}) {
-    {{slot_type}} slot;
-#if CYTHON_USE_TYPE_SLOTS
-    slot = type->tp_as_number ? type->tp_as_number->{{slot_name}} : NULL;
-#else
-    slot = ({{slot_type}}) PyType_GetSlot(type, Py_{{slot_name}});
-#endif
-    return slot ? slot(left, right {{extra_arg}}) : __Pyx_NewRef(Py_NotImplemented);
-}
-
 static PyObject *{{func_name}}(PyObject *left, PyObject *right {{extra_arg_decl}}) {
     PyObject *res;
     int maybe_self_is_left, maybe_self_is_right = 0;
     maybe_self_is_left = Py_TYPE(left) == Py_TYPE(right)
-#if CYTHON_USE_TYPE_SLOTS
             || (Py_TYPE(left)->tp_as_number && Py_TYPE(left)->tp_as_number->{{slot_name}} == &{{func_name}})
-#endif
-            || __Pyx_TypeCheck(left, {{type_cname}});
+            || PyType_IsSubtype(Py_TYPE(left), {{type_cname}});
     // Optimize for the common case where the left operation is defined (and successful).
     if (!{{overloads_left}}) {
         maybe_self_is_right = Py_TYPE(left) == Py_TYPE(right)
-#if CYTHON_USE_TYPE_SLOTS
                 || (Py_TYPE(right)->tp_as_number && Py_TYPE(right)->tp_as_number->{{slot_name}} == &{{func_name}})
-#endif
-                || __Pyx_TypeCheck(right, {{type_cname}});
+                || PyType_IsSubtype(Py_TYPE(right), {{type_cname}});
     }
     if (maybe_self_is_left) {
         if (maybe_self_is_right && !{{overloads_left}}) {
             res = {{call_right}};
             if (res != Py_NotImplemented) return res;
             Py_DECREF(res);
-            // Don't bother calling it again.
-            maybe_self_is_right = 0;
+            maybe_self_is_right = 0;  // Don't bother calling it again.
         }
         res = {{call_left}};
         if (res != Py_NotImplemented) return res;
@@ -321,13 +306,11 @@ static PyObject *{{func_name}}(PyObject *left, PyObject *right {{extra_arg_decl}
     }
     if ({{overloads_left}}) {
         maybe_self_is_right = Py_TYPE(left) == Py_TYPE(right)
-#if CYTHON_USE_TYPE_SLOTS
                 || (Py_TYPE(right)->tp_as_number && Py_TYPE(right)->tp_as_number->{{slot_name}} == &{{func_name}})
-#endif
                 || PyType_IsSubtype(Py_TYPE(right), {{type_cname}});
     }
     if (maybe_self_is_right) {
         return {{call_right}};
     }
-    return __Pyx_NewRef(Py_NotImplemented);
+    return Py_INCREF(Py_NotImplemented), Py_NotImplemented;
 }