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Issue #16431: Use the type information when constructing a Decimal subtype

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from a Decimal argument.
This commit is contained in:
Stefan Krah 2012-11-07 23:12:25 +01:00
parent 33363f43e3
commit f4abc7b8a0
3 changed files with 35 additions and 2 deletions
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29
Modules/_decimal/_decimal.c
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@ -2338,6 +2338,32 @@ PyDecType_FromFloat(PyTypeObject *type, PyObject *v,
return dec;
}
/* Return a new PyDecObject (subtype) from a Decimal. */
static PyObject *
PyDecType_FromDecimalExact(PyTypeObject *type, PyObject *v, PyObject *context)
{
PyObject *dec;
uint32_t status = 0;
if (type == &PyDec_Type) {
Py_INCREF(v);
return v;
}
dec = PyDecType_New(type);
if (dec == NULL) {
return NULL;
}
mpd_qcopy(MPD(dec), MPD(v), &status);
if (dec_addstatus(context, status)) {
Py_DECREF(dec);
return NULL;
}
return dec;
}
static PyObject *
sequence_as_tuple(PyObject *v, PyObject *ex, const char *mesg)
{
@ -2642,8 +2668,7 @@ PyDecType_FromObjectExact(PyTypeObject *type, PyObject *v, PyObject *context)
return PyDecType_FromSsizeExact(type, 0, context);
}
else if (PyDec_Check(v)) {
Py_INCREF(v);
return v;
return PyDecType_FromDecimalExact(type, v, context);
}
else if (PyUnicode_Check(v)) {
return PyDecType_FromUnicodeExactWS(type, v, context);