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SF bug #460020: bug or feature: unicode() and subclasses.

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Given an immutable type M, and an instance I of a subclass of M, the
constructor call M(I) was just returning I as-is; but it should return a
new instance of M.  This fixes it for M in {int, long}.  Strings, floats
and tuples remain to be done.
Added new macros PyInt_CheckExact and PyLong_CheckExact, to more easily
distinguish between "is" and "is a" (i.e., only an int passes
PyInt_CheckExact, while any sublass of int passes PyInt_Check).
Added private API function _PyLong_Copy.
This commit is contained in:
Tim Peters 2001-09-10 20:52:51 +00:00
parent 8b4e43e768
commit 64b5ce3a69
6 changed files with 55 additions and 3 deletions
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21
Objects/longobject.c
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@ -51,6 +51,25 @@ _PyLong_New(int size)
return PyObject_NEW_VAR(PyLongObject, &PyLong_Type, size);
}
PyObject *
_PyLong_Copy(PyLongObject *src)
{
PyLongObject *result;
int i;
assert(src != NULL);
i = src->ob_size;
if (i < 0)
i = -(i);
result = _PyLong_New(i);
if (result != NULL) {
result->ob_size = i;
while (--i >= 0)
result->ob_digit[i] = src->ob_digit[i];
}
return (PyObject *)result;
}
/* Create a new long int object from a C long int */
PyObject *
@ -2205,7 +2224,7 @@ long_subtype_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
tmp = (PyLongObject *)long_new(&PyLong_Type, args, kwds);
if (tmp == NULL)
return NULL;
assert(PyLong_Check(tmp));
assert(PyLong_CheckExact(tmp));
n = tmp->ob_size;
if (n < 0)
n = -n;