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Add parentheses around numeric literals, to avoid turning 3 .bit_length() into 3.bit_length().

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This commit is contained in:
Mark Dickinson 2010-06-29 08:52:36 +00:00
parent 82c8d93357
commit 3eb0290346
2 changed files with 14 additions and 10 deletions
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21
Demo/parser/unparse.py
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@ -302,16 +302,17 @@ class Unparser:
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("[")