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No more raising of string exceptions!

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The next step of PEP 352 (for 2.6) causes raising a string exception to trigger
a TypeError.  Trying to catch a string exception raises a DeprecationWarning.
References to string exceptions has been removed from the docs since they are
now just an error.
This commit is contained in:
Brett Cannon 2007-01-30 21:34:36 +00:00
parent a05153683c
commit 129bd52146
5 changed files with 76 additions and 56 deletions
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47
Python/ceval.c
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@ -2206,8 +2206,9 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
case SETUP_LOOP:
case SETUP_EXCEPT:
case SETUP_FINALLY:
/* NOTE: If you add any new block-setup opcodes that are not try/except/finally
handlers, you may need to update the PyGen_NeedsFinalizing() function. */
/* NOTE: If you add any new block-setup opcodes that are
not try/except/finally handlers, you may need to
update the PyGen_NeedsFinalizing() function. */
PyFrame_BlockSetup(f, opcode, INSTR_OFFSET() + oparg,
STACK_LEVEL());
@ -3069,15 +3070,7 @@ do_raise(PyObject *type, PyObject *value, PyObject *tb)
Py_DECREF(tmp);
}
if (PyString_CheckExact(type)) {
/* Raising builtin string is deprecated but still allowed --
* do nothing. Raising an instance of a new-style str
* subclass is right out. */
if (PyErr_Warn(PyExc_DeprecationWarning,
"raising a string exception is deprecated"))
goto raise_error;
}
else if (PyExceptionClass_Check(type))
if (PyExceptionClass_Check(type))
PyErr_NormalizeException(&type, &value, &tb);
else if (PyExceptionInstance_Check(type)) {
@ -3099,8 +3092,7 @@ do_raise(PyObject *type, PyObject *value, PyObject *tb)
/* Not something you can raise. You get an exception
anyway, just not what you specified :-) */
PyErr_Format(PyExc_TypeError,
"exceptions must be classes, instances, or "
"strings (deprecated), not %s",
"exceptions must be classes or instances, not %s",
type->ob_type->tp_name);
goto raise_error;
}
@ -3985,6 +3977,35 @@ cmp_outcome(int op, register PyObject *v, register PyObject *w)
res = !res;
break;
case PyCmp_EXC_MATCH:
if (PyTuple_Check(w)) {
Py_ssize_t i, length;
length = PyTuple_Size(w);
for (i = 0; i < length; i += 1) {
PyObject *exc = PyTuple_GET_ITEM(w, i);
if (PyString_Check(exc)) {
int ret_val;
ret_val = PyErr_WarnEx(
PyExc_DeprecationWarning,
"catching of string "
"exceptions is "
"deprecated", 1);
if (ret_val == -1)
return NULL;
}
}
}
else {
if (PyString_Check(w)) {
int ret_val;
ret_val = PyErr_WarnEx(
PyExc_DeprecationWarning,
"catching of string "
"exceptions is deprecated",
1);
if (ret_val == -1)
return NULL;
}
}
res = PyErr_GivenExceptionMatches(v, w);
break;
default: