[pypy-svn] r10015 - pypy/dist/pypy/objspace

[arigo at codespeak.net]

Author: arigo
Date: Mon Mar 21 21:01:14 2005
New Revision: 10015

Added:
   pypy/dist/pypy/objspace/idhack.py   (contents, props changed)
Log:
An example of strange object space.  Very crashy...


Added: pypy/dist/pypy/objspace/idhack.py
==============================================================================
--- (empty file)
+++ pypy/dist/pypy/objspace/idhack.py	Mon Mar 21 21:01:14 2005
@@ -0,0 +1,53 @@
+"""Example usage:
+
+    $ python interpreter/py.py -o idhack
+    >>> x = 6
+    >>> id(x)
+    12345678
+    >>> become(x, 7)
+    >>> x
+    7
+    >>> id(x)
+    12345678
+
+"""
+
+import autopath
+from pypy.objspace import std
+from pypy.interpreter import gateway
+
+# ____________________________________________________________
+
+def idhack(w_obj):
+    try:
+        return w_obj.__id
+    except AttributeError:
+        w_obj.__id = id(w_obj)
+        return w_obj.__id
+
+
+class IdHackSpace(std.Space):
+
+    def initialize(self):
+        super(IdHackSpace, self).initialize()
+        self.setitem(self.builtin.w_dict, self.wrap('become'),
+                     self.wrap(app_become))
+
+    def is_(self, w_one, w_two):
+        if idhack(w_one) == idhack(w_two):
+            return self.w_True
+        return self.w_False
+
+    def id(self, w_obj):
+        return self.wrap(idhack(w_obj))
+
+
+Space = IdHackSpace
+
+# ____________________________________________________________
+
+def become(space, w_target, w_source):
+    w_target.__class__ = w_source.__class__
+    w_target.__dict__  = w_source.__dict__
+    return space.w_None
+app_become = gateway.interp2app(become)