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The methods always return Decimal classes, even if they're
executed through a subclass (thanks Mark Dickinson). Added a bit of testing for this.
This commit is contained in:
Facundo Batista
parent
b67da23718
commit
6c398da0e7
2 changed files with 53 additions and 34 deletions
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@ -1473,7 +1473,7 @@ class Decimal(object):
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pos += 1
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payload = payload[pos:]
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return Decimal((self._sign, payload, self._exp))
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return self
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return Decimal(self)
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def _fix(self, context):
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"""Round if it is necessary to keep self within prec precision.
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@ -1494,7 +1494,7 @@ class Decimal(object):
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return self._fix_nan(context)
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else:
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# self is +/-Infinity; return unaltered
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return self
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return Decimal(self)
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# if self is zero then exponent should be between Etiny and
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# Emax if _clamp==0, and between Etiny and Etop if _clamp==1.
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@ -1507,7 +1507,7 @@ class Decimal(object):
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context._raise_error(Clamped)
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return Decimal((self._sign, (0,), new_exp))
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else:
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return self
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return Decimal(self)
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# exp_min is the smallest allowable exponent of the result,
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# equal to max(self.adjusted()-context.prec+1, Etiny)
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@ -1551,7 +1551,7 @@ class Decimal(object):
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return Decimal((self._sign, self_padded, Etop))
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# here self was representable to begin with; return unchanged
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return self
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return Decimal(self)
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_pick_rounding_function = {}
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@ -1678,10 +1678,10 @@ class Decimal(object):
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return context._raise_error(InvalidOperation, 'sNaN',
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1, modulo)
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if self_is_nan:
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return self
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return self._fix_nan(context)
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if other_is_nan:
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return other
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return modulo
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return other._fix_nan(context)
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return modulo._fix_nan(context)
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# check inputs: we apply same restrictions as Python's pow()
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if not (self._isinteger() and
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@ -2179,7 +2179,7 @@ class Decimal(object):
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if exp._isinfinity() or self._isinfinity():
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if exp._isinfinity() and self._isinfinity():
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return self # if both are inf, it is OK
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return Decimal(self) # if both are inf, it is OK
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return context._raise_error(InvalidOperation,
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'quantize with one INF')
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@ -2254,7 +2254,7 @@ class Decimal(object):
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rounding = rounding mode
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"""
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if self._is_special:
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return self
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return Decimal(self)
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if not self:
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return Decimal((self._sign, (0,), exp))
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@ -2285,9 +2285,9 @@ class Decimal(object):
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ans = self._check_nans(context=context)
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if ans:
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return ans
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return self
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return Decimal(self)
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if self._exp >= 0:
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return self
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return Decimal(self)
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if not self:
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return Decimal((self._sign, (0,), 0))
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if context is None:
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@ -2310,9 +2310,9 @@ class Decimal(object):
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ans = self._check_nans(context=context)
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if ans:
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return ans
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return self
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return Decimal(self)
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if self._exp >= 0:
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return self
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return Decimal(self)
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else:
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return self._rescale(0, rounding)
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@ -2426,6 +2426,9 @@ class Decimal(object):
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"""
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other = _convert_other(other, raiseit=True)
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if context is None:
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context = getcontext()
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if self._is_special or other._is_special:
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# If one operand is a quiet NaN and the other is number, then the
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# number is always returned
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@ -2433,9 +2436,9 @@ class Decimal(object):
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on = other._isnan()
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if sn or on:
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if on == 1 and sn != 2:
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return self
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return self._fix_nan(context)
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if sn == 1 and on != 2:
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return other
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return other._fix_nan(context)
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return self._check_nans(other, context)
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c = self.__cmp__(other)
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@ -2455,8 +2458,6 @@ class Decimal(object):
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else:
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ans = self
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if context is None:
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context = getcontext()
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if context._rounding_decision == ALWAYS_ROUND:
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return ans._fix(context)
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return ans
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@ -2469,6 +2470,9 @@ class Decimal(object):
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"""
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other = _convert_other(other, raiseit=True)
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if context is None:
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context = getcontext()
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if self._is_special or other._is_special:
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# If one operand is a quiet NaN and the other is number, then the
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# number is always returned
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@ -2476,9 +2480,9 @@ class Decimal(object):
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on = other._isnan()
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if sn or on:
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if on == 1 and sn != 2:
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return self
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return self._fix_nan(context)
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if sn == 1 and on != 2:
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return other
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return other._fix_nan(context)
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return self._check_nans(other, context)
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c = self.__cmp__(other)
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@ -2490,8 +2494,6 @@ class Decimal(object):
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else:
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ans = other
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if context is None:
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context = getcontext()
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if context._rounding_decision == ALWAYS_ROUND:
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return ans._fix(context)
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return ans
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@ -3087,6 +3089,9 @@ class Decimal(object):
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"""Compares the values numerically with their sign ignored."""
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other = _convert_other(other, raiseit=True)
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if context is None:
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context = getcontext()
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if self._is_special or other._is_special:
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# If one operand is a quiet NaN and the other is number, then the
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# number is always returned
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@ -3094,9 +3099,9 @@ class Decimal(object):
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on = other._isnan()
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if sn or on:
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if on == 1 and sn != 2:
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return self
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return self._fix_nan(context)
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if sn == 1 and on != 2:
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return other
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return other._fix_nan(context)
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return self._check_nans(other, context)
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c = self.copy_abs().__cmp__(other.copy_abs())
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@ -3108,8 +3113,6 @@ class Decimal(object):
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else:
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ans = self
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if context is None:
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context = getcontext()
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if context._rounding_decision == ALWAYS_ROUND:
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return ans._fix(context)
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return ans
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@ -3118,6 +3121,9 @@ class Decimal(object):
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"""Compares the values numerically with their sign ignored."""
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other = _convert_other(other, raiseit=True)
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if context is None:
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context = getcontext()
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if self._is_special or other._is_special:
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# If one operand is a quiet NaN and the other is number, then the
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# number is always returned
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@ -3125,9 +3131,9 @@ class Decimal(object):
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on = other._isnan()
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if sn or on:
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if on == 1 and sn != 2:
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return self
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return self._fix_nan(context)
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if sn == 1 and on != 2:
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return other
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return other._fix_nan(context)
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return self._check_nans(other, context)
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c = self.copy_abs().__cmp__(other.copy_abs())
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@ -3139,8 +3145,6 @@ class Decimal(object):
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else:
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ans = other
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if context is None:
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context = getcontext()
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if context._rounding_decision == ALWAYS_ROUND:
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return ans._fix(context)
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return ans
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@ -3296,7 +3300,7 @@ class Decimal(object):
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return context._raise_error(InvalidOperation)
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if self._isinfinity():
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return self
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return Decimal(self)
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# get values, pad if necessary
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torot = int(other)
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@ -3334,7 +3338,7 @@ class Decimal(object):
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return context._raise_error(InvalidOperation)
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if self._isinfinity():
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return self
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return Decimal(self)
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d = Decimal((self._sign, self._int, self._exp + int(other)))
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d = d._fix(context)
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@ -3355,12 +3359,12 @@ class Decimal(object):
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return context._raise_error(InvalidOperation)
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if self._isinfinity():
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return self
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return Decimal(self)
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# get values, pad if necessary
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torot = int(other)
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if not torot:
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return self
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return Decimal(self)
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rotdig = self._int
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topad = context.prec - len(rotdig)
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if topad:
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@ -3751,7 +3755,7 @@ class Context(object):
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>>> ExtendedContext.copy_decimal(Decimal('-1.00'))
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Decimal("-1.00")
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"""
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return a
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return Decimal(a)
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def copy_negate(self, a):
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"""Returns a copy of the operand with the sign inverted.
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