Author: Armin Rigo <[email protected]>
Branch:
Changeset: r52393:ab23bf4e4b91
Date: 2012-02-12 18:02 +0100
http://bitbucket.org/pypy/pypy/changeset/ab23bf4e4b91/
Log: Clarify this point
diff --git a/pypy/doc/coding-guide.rst b/pypy/doc/coding-guide.rst
--- a/pypy/doc/coding-guide.rst
+++ b/pypy/doc/coding-guide.rst
@@ -388,7 +388,9 @@
In a few cases (e.g. hash table manipulation), we need machine-sized unsigned
arithmetic. For these cases there is the r_uint class, which is a pure
Python implementation of word-sized unsigned integers that silently wrap
- around. The purpose of this class (as opposed to helper functions as above)
+ around. ("word-sized" and "machine-sized" are used equivalently and mean
+ the native size, which you get using "unsigned long" in C.)
+ The purpose of this class (as opposed to helper functions as above)
is consistent typing: both Python and the annotator will propagate r_uint
instances in the program and interpret all the operations between them as
unsigned. Instances of r_uint are special-cased by the code generators to
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