Issue 11131: Fix sign of zero result on plus and minus operations in ROUND_FLOOR rounding mode.
diff --git a/Lib/decimal.py b/Lib/decimal.py
index feba3d7..102fc8e 100644
--- a/Lib/decimal.py
+++ b/Lib/decimal.py
@@ -1068,14 +1068,16 @@
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):
@@ -1088,14 +1090,15 @@
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):