Oren Milman added the comment:
I guess you meant for me to check whether the following has any problem:
import decimal
class BadFloat(float):
def as_integer_ratio(self):
return 1 << 1000
decimal.Decimal.from_float(BadFloat())
so it doesn't crash.
if IIUC, this is because the C implementation of Decimal.from_float()
is PyDecType_FromFloat(), while the relevant part of it is a call to
PyDecType_FromFloatExact().
But PyDecType_FromFloatExact() uses float.as_integer_ratio(), and thus
ISTM that the issue doesn't exist there.
(also, the following doesn't raise an exception, as expected:
import decimal
class BadFloat(float):
def as_integer_ratio(self):
raise RuntimeError
decimal.Decimal.from_float(BadFloat())
)
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