mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-07-28 13:44:43 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 6

Issue #7279: Make comparisons involving a Decimal sNaN signal InvalidOperation.

Browse source
This commit is contained in:
Mark Dickinson 2010-04-02 10:17:07 +00:00
parent ea2d389474
commit e096e82e82
3 changed files with 60 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

15
Lib/decimal.py
View file

@ -845,8 +845,11 @@ class Decimal(object):
# subject of what should happen for a comparison involving a NaN.
# We take the following approach:
#
# == comparisons involving a NaN always return False
# != comparisons involving a NaN always return True
# == comparisons involving a quiet NaN always return False
# != comparisons involving a quiet NaN always return True
# == or != comparisons involving a signaling NaN signal
# InvalidOperation, and return False or True as above if the
# InvalidOperation is not trapped.
# <, >, <= and >= comparisons involving a (quiet or signaling)
# NaN signal InvalidOperation, and return False if the
# InvalidOperation is not trapped.
@ -854,19 +857,19 @@ class Decimal(object):
# This behavior is designed to conform as closely as possible to
# that specified by IEEE 754.
def __eq__(self, other):
def __eq__(self, other, context=None):
other = _convert_other(other, allow_float=True)
if other is NotImplemented:
return other
if self.is_nan() or other.is_nan():
if self._check_nans(other, context):
return False
return self._cmp(other) == 0
def __ne__(self, other):
def __ne__(self, other, context=None):
other = _convert_other(other, allow_float=True)
if other is NotImplemented:
return other
if self.is_nan() or other.is_nan():
if self._check_nans(other, context):
return True
return self._cmp(other) != 0