Author: Armin Rigo <[email protected]>
Branch:
Changeset: r55001:7af5293034d4
Date: 2012-05-10 08:42 +0200
http://bitbucket.org/pypy/pypy/changeset/7af5293034d4/
Log: Comments
diff --git a/pypy/rlib/rshrinklist.py b/pypy/rlib/rshrinklist.py
--- a/pypy/rlib/rshrinklist.py
+++ b/pypy/rlib/rshrinklist.py
@@ -1,5 +1,12 @@
class AbstractShrinkList(object):
+ """A mixin base class. You should subclass it and add a method
+ must_keep(). Behaves like a list with the method append(), and
+ you can read *for reading* the list of items by calling items().
+ The twist is that occasionally append() will throw away the
+ items for which must_keep() returns False. (It does so without
+ changing the order.)
+ """
_mixin_ = True
def __init__(self):
diff --git a/pypy/rlib/test/test_rshrinklist.py
b/pypy/rlib/test/test_rshrinklist.py
--- a/pypy/rlib/test/test_rshrinklist.py
+++ b/pypy/rlib/test/test_rshrinklist.py
@@ -19,7 +19,7 @@
l3 = [Item() for i in range(150 + 16)]
for x in l3:
l.append(x)
- assert l.items() == l2[1::2] + l3
+ assert l.items() == l2[1::2] + l3 # keeps the order
def test_append_dead_items():
l = ItemList()
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