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* classobject.[ch], {float,long,int}object.c, bltinmodule.c:

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coercion is now completely generic.
* ceval.c: for instances, don't coerce for + and *; * reverses
  arguments if left one is non-instance numeric and right one sequence.
This commit is contained in:
Guido van Rossum 1992-08-14 12:06:52 +00:00
parent 70d7a310a9
commit e6eefc2231
7 changed files with 123 additions and 93 deletions
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42
Python/bltinmodule.c
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@ -781,10 +781,7 @@ initbuiltin()
Increment the reference count on each argument.
Return -1 and raise an exception if no coercion is possible
(and then no reference count is incremented).
XXX This should be distributed over the various numeric types,
XXX but for now I don't see how to implement that.
XXX So, for now, if you add a new numeric type,
XXX you must add to this function as well. */
*/
int
coerce(pv, pw)
@ -792,36 +789,23 @@ coerce(pv, pw)
{
register object *v = *pv;
register object *w = *pw;
int res;
if (v->ob_type == w->ob_type) {
INCREF(v);
INCREF(w);
return 0;
}
if (is_instanceobject(v) || is_instanceobject(w))
return instance_coerce(pv, pw);
if (v->ob_type->tp_as_number == NULL ||
w->ob_type->tp_as_number == NULL) {
err_setstr(TypeError, "mixing number and non-number");
return -1;
if (v->ob_type->tp_as_number && v->ob_type->tp_as_number->nb_coerce) {
res = (*v->ob_type->tp_as_number->nb_coerce)(pv, pw);
if (res <= 0)
return res;
}
if (is_floatobject(v) || is_floatobject(w)) {
v = builtin_float((object *)0, v);
w = builtin_float((object *)0, w);
if (w->ob_type->tp_as_number && w->ob_type->tp_as_number->nb_coerce) {
res = (*w->ob_type->tp_as_number->nb_coerce)(pw, pv);
if (res <= 0)
return res;
}
else if (is_longobject(v) || is_longobject(w)) {
v = builtin_long((object *)0, v);
w = builtin_long((object *)0, w);
}
else {
err_setstr(TypeError, "can't coerce numeric types?!?!?");
return -1;
}
if (v == NULL || w == NULL) {
XDECREF(v);
XDECREF(w);
return -1;
}
*pv = v;
*pw = w;
return 0;
err_setstr(TypeError, "number coercion failed");
return -1;
}