Mercurial > cpython-lru_cache-weakref

diff Objects/classobject.c @ 1290:7971fecbf28e legacy-trunk

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* Lots of small changes related to access. * Added "access *: ...", made access work for class methods. * Introduced subclass check: make sure that when calling ClassName.methodname(instance, ...), the instance is an instance of ClassName or of a subclass thereof (this might break some old code!)
author Guido van Rossum <guido@python.org>
date Fri, 21 May 1993 19:56:10 +0000
parents 4d292c7857d4
children ac3c80abbf43
line wrap: on
line diff
--- a/Objects/classobject.c	Thu May 20 14:24:46 1993 +0000
+++ b/Objects/classobject.c	Fri May 21 19:56:10 1993 +0000
@@ -121,18 +121,24 @@
 		return v;
 	}
 	v = class_lookup(op, name, &class);
-	if (v != NULL) {
-		if (is_accessobject(v))
-			v = getaccessvalue(v, getclass());
-		else if (is_funcobject(v))
-			v = newinstancemethodobject(v, (object *)NULL,
+	if (v == NULL) {
+		err_setstr(AttributeError, name);
+		return NULL;
+	}
+	if (is_accessobject(v)) {
+		v = getaccessvalue(v, getclass());
+		if (v == NULL)
+			return NULL;
+	}
+	else
+		INCREF(v);
+	if (is_funcobject(v)) {
+		object *w = newinstancemethodobject(v, (object *)NULL,
 						    (object *)class);
-		else
-			INCREF(v);
-		return v;
+		DECREF(v);
+		v = w;
 	}
-	err_setstr(AttributeError, name);
-	return NULL;
+	return v;
 }
 
 static int
@@ -217,12 +223,6 @@
 
 /* Instance objects */
 
-typedef struct {
-	OB_HEAD
-	classobject	*in_class;	/* The class object */
-	object		*in_dict;	/* A dictionary */
-} instanceobject;
-
 static object *instance_getattr PROTO((instanceobject *, char *));
 
 static int
@@ -241,8 +241,11 @@
 	
 	pos = 0;
 	while (mappinggetnext(class->cl_dict, &pos, &key, &value)) {
+		object *v;
 		if (!is_accessobject(value))
 			continue;
+		if (hasaccessvalue(value))
+			continue;
 		ac = dict2lookup(inst->in_dict, key);
 		if (ac != NULL && is_accessobject(ac)) {
 			err_setval(ConflictError, key);
@@ -361,22 +364,27 @@
 		return (object *)inst->in_class;
 	}
 	v = dictlookup(inst->in_dict, name);
-	if (v != NULL) {
-		if (is_accessobject(v))
-			v = getaccessvalue(v, getclass());
-		else
-			INCREF(v);
-		return v;
+	if (v == NULL) {
+		v = class_lookup(inst->in_class, name, &class);
+		if (v == NULL) {
+			err_setstr(AttributeError, name);
+			return NULL;
+		}
 	}
-	v = class_lookup(inst->in_class, name, &class);
-	if (v == NULL)
-		goto error;
-	if (is_funcobject(v))
-		return newinstancemethodobject(v, (object *)inst,
-					       (object *)class);
- error:
-	err_setstr(AttributeError, name);
-	return NULL;
+	if (is_accessobject(v)) {
+		v = getaccessvalue(v, getclass());
+		if (v == NULL)
+			return NULL;
+	}
+	else
+		INCREF(v);
+	if (is_funcobject(v)) {
+		object *w = newinstancemethodobject(v, (object *)inst,
+						    (object *)class);
+		DECREF(v);
+		v = w;
+	}
+	return v;
 }
 
 static int