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Description
Assigning a negative value to an unsigned integer member can emit a RuntimeWarning.
$ ./python -Wa>>>import _testcapi>>> ts= _testcapi._test_structmembersType_NewAPI()>>> ts.T_UBYTE=-42<stdin>:1: RuntimeWarning: Truncation of value to unsigned char>>> ts.T_USHORT=-42<stdin>:1: RuntimeWarning: Truncation of value to unsigned short>>> ts.T_UINT=-42<stdin>:1: RuntimeWarning: Writing negative value into unsigned field<stdin>:1: RuntimeWarning: Truncation of value to unsigned int>>> ts.T_ULONG=-42<stdin>:1: RuntimeWarning: Writing negative value into unsigned field
(And for T_ULONGLONG it raises an OverflowError, but this is perhaps another issue).
The first issue is that it emits two warnings for T_UINT. It is also weird that warnings are different.
The second issue is that if the value is not an int subclass, it emits a warning also for positive values for T_UINT and T_ULONG:
>>>classIndex:...def__init__(self,value):...self.value= value...def__index__(self):...returnself.value... >>> ts.T_UBYTE= Index(42)>>> ts.T_USHORT= Index(42)>>> ts.T_UINT= Index(42)<stdin>:1: RuntimeWarning: Writing negative value into unsigned field>>> ts.T_ULONG= Index(42)<stdin>:1: RuntimeWarning: Writing negative value into unsigned field
(No warning is emitted for assigning a negative index to T_ULONGLONG, but this is perhaps another issue).