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Issue 11131: Fix sign of zero result on decimal.Decimal plus and minus operations in ROUND_FLOOR rounding mode.

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This commit is contained in:
Mark Dickinson 2011-03-12 11:12:52 +00:00
parent abd4a05561
commit 37a79fb75b
3 changed files with 84 additions and 8 deletions
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19
Lib/decimal.py
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@ -1040,14 +1040,16 @@ class Decimal(object):
if ans:
return ans
if not self:
# -Decimal('0') is Decimal('0'), not Decimal('-0')
if context is None:
context = getcontext()
if not self and context.rounding != ROUND_FLOOR:
# -Decimal('0') is Decimal('0'), not Decimal('-0'), except
# in ROUND_FLOOR rounding mode.
ans = self.copy_abs()
else:
ans = self.copy_negate()
if context is None:
context = getcontext()
return ans._fix(context)
def __pos__(self, context=None):
@ -1060,14 +1062,15 @@ class Decimal(object):
if ans:
return ans
if not self:
# + (-0) = 0
if context is None:
context = getcontext()
if not self and context.rounding != ROUND_FLOOR:
# + (-0) = 0, except in ROUND_FLOOR rounding mode.
ans = self.copy_abs()
else:
ans = Decimal(self)
if context is None:
context = getcontext()
return ans._fix(context)
def __abs__(self, round=True, context=None):