[Python-checkins] r82359 - in python/branches/py3k/Demo/parser: test_unparse.py unparse.py
mark.dickinson
python-checkins at python.org
Tue Jun 29 10:52:36 CEST 2010
Author: mark.dickinson
Date: Tue Jun 29 10:52:36 2010
New Revision: 82359
Log:
Add parentheses around numeric literals, to avoid turning 3 .bit_length() into 3.bit_length().
Modified:
python/branches/py3k/Demo/parser/test_unparse.py
python/branches/py3k/Demo/parser/unparse.py
Modified: python/branches/py3k/Demo/parser/test_unparse.py
==============================================================================
--- python/branches/py3k/Demo/parser/test_unparse.py (original)
+++ python/branches/py3k/Demo/parser/test_unparse.py Tue Jun 29 10:52:36 2010
@@ -84,6 +84,9 @@
self.check_roundtrip("not True or False")
self.check_roundtrip("True or not False")
+ def test_integer_parens(self):
+ self.check_roundtrip("3 .__abs__()")
+
def test_chained_comparisons(self):
self.check_roundtrip("1 < 4 <= 5")
self.check_roundtrip("a is b is c is not d")
Modified: python/branches/py3k/Demo/parser/unparse.py
==============================================================================
--- python/branches/py3k/Demo/parser/unparse.py (original)
+++ python/branches/py3k/Demo/parser/unparse.py Tue Jun 29 10:52:36 2010
@@ -302,16 +302,17 @@
self.write("`")
def _Num(self, t):
- # There are no negative numeric literals in Python; however,
- # some optimizations produce a negative Num in the AST. Add
- # parentheses to avoid turning (-1)**2 into -1**2.
- strnum = repr(t.n)
- if strnum.startswith("-"):
- self.write("(")
- self.write(strnum)
- self.write(")")
- else:
- self.write(strnum)
+ # Add parentheses around numeric literals to avoid:
+ #
+ # (1) turning (-1)**2 into -1**2, and
+ # (2) turning 3 .__abs__() into 3.__abs__()
+ #
+ # For (1), note that Python doesn't actually have negative
+ # numeric literals, but (at least in Python 2.x) there's a CST
+ # transformation that can produce negative Nums in the AST.
+ self.write("(")
+ self.write(repr(t.n))
+ self.write(")")
def _List(self, t):
self.write("[")
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