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PEP 352 implementation. Creates a new base class, BaseException, which has an

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added message attribute compared to the previous version of Exception.  It is
also a new-style class, making all exceptions now new-style.  KeyboardInterrupt
and SystemExit inherit from BaseException directly.  String exceptions now
raise DeprecationWarning.

Applies patch 1104669, and closes bugs 1012952 and 518846.
This commit is contained in:
Brett Cannon 2006-03-01 04:25:17 +00:00
parent 762467475d
commit bf36409e2a
16 changed files with 570 additions and 232 deletions
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66
Python/errors.c
View file

@ -97,11 +97,14 @@ PyErr_GivenExceptionMatches(PyObject *err, PyObject *exc)
return 0;
}
/* err might be an instance, so check its class. */
if (PyInstance_Check(err))
err = (PyObject*)((PyInstanceObject*)err)->in_class;
if (PyExceptionInstance_Check(err))
err = PyExceptionInstance_Class(err);
if (PyClass_Check(err) && PyClass_Check(exc))
return PyClass_IsSubclass(err, exc);
if (PyExceptionClass_Check(err) && PyExceptionClass_Check(exc)) {
/* problems here!? not sure PyObject_IsSubclass expects to
be called with an exception pending... */
return PyObject_IsSubclass(err, exc);
}
return err == exc;
}
@ -138,19 +141,19 @@ PyErr_NormalizeException(PyObject **exc, PyObject **val, PyObject **tb)
Py_INCREF(value);
}
if (PyInstance_Check(value))
inclass = (PyObject*)((PyInstanceObject*)value)->in_class;
if (PyExceptionInstance_Check(value))
inclass = PyExceptionInstance_Class(value);
/* Normalize the exception so that if the type is a class, the
value will be an instance.
*/
if (PyClass_Check(type)) {
if (PyExceptionClass_Check(type)) {
/* if the value was not an instance, or is not an instance
whose class is (or is derived from) type, then use the
value as an argument to instantiation of the type
class.
*/
if (!inclass || !PyClass_IsSubclass(inclass, type)) {
if (!inclass || !PyObject_IsSubclass(inclass, type)) {
PyObject *args, *res;
if (value == Py_None)
@ -282,7 +285,7 @@ PyErr_SetFromErrnoWithFilenameObject(PyObject *exc, PyObject *filenameObject)
{
/* Note that the Win32 errors do not lineup with the
errno error. So if the error is in the MSVC error
table, we use it, otherwise we assume it really _is_
table, we use it, otherwise we assume it really _is_
a Win32 error code
*/
if (i > 0 && i < _sys_nerr) {
@ -302,7 +305,7 @@ PyErr_SetFromErrnoWithFilenameObject(PyObject *exc, PyObject *filenameObject)
0, /* size not used */
NULL); /* no args */
if (len==0) {
/* Only ever seen this in out-of-mem
/* Only ever seen this in out-of-mem
situations */
sprintf(s_small_buf, "Windows Error 0x%X", i);
s = s_small_buf;
@ -345,8 +348,8 @@ PyErr_SetFromErrnoWithFilename(PyObject *exc, char *filename)
PyObject *
PyErr_SetFromErrnoWithUnicodeFilename(PyObject *exc, Py_UNICODE *filename)
{
PyObject *name = filename ?
PyUnicode_FromUnicode(filename, wcslen(filename)) :
PyObject *name = filename ?
PyUnicode_FromUnicode(filename, wcslen(filename)) :
NULL;
PyObject *result = PyErr_SetFromErrnoWithFilenameObject(exc, name);
Py_XDECREF(name);
@ -360,7 +363,7 @@ PyErr_SetFromErrno(PyObject *exc)
return PyErr_SetFromErrnoWithFilenameObject(exc, NULL);
}
#ifdef MS_WINDOWS
#ifdef MS_WINDOWS
/* Windows specific error code handling */
PyObject *PyErr_SetExcFromWindowsErrWithFilenameObject(
PyObject *exc,
@ -415,8 +418,8 @@ PyObject *PyErr_SetExcFromWindowsErrWithFilename(
const char *filename)
{
PyObject *name = filename ? PyString_FromString(filename) : NULL;
PyObject *ret = PyErr_SetExcFromWindowsErrWithFilenameObject(exc,
ierr,
PyObject *ret = PyErr_SetExcFromWindowsErrWithFilenameObject(exc,
ierr,
name);
Py_XDECREF(name);
return ret;
@ -428,11 +431,11 @@ PyObject *PyErr_SetExcFromWindowsErrWithUnicodeFilename(
int ierr,
const Py_UNICODE *filename)
{
PyObject *name = filename ?
PyUnicode_FromUnicode(filename, wcslen(filename)) :
PyObject *name = filename ?
PyUnicode_FromUnicode(filename, wcslen(filename)) :
NULL;
PyObject *ret = PyErr_SetExcFromWindowsErrWithFilenameObject(exc,
ierr,
PyObject *ret = PyErr_SetExcFromWindowsErrWithFilenameObject(exc,
ierr,
name);
Py_XDECREF(name);
return ret;
@ -466,8 +469,8 @@ PyObject *PyErr_SetFromWindowsErrWithUnicodeFilename(
int ierr,
const Py_UNICODE *filename)
{
PyObject *name = filename ?
PyUnicode_FromUnicode(filename, wcslen(filename)) :
PyObject *name = filename ?
PyUnicode_FromUnicode(filename, wcslen(filename)) :
NULL;
PyObject *result = PyErr_SetExcFromWindowsErrWithFilenameObject(
PyExc_WindowsError,
@ -574,7 +577,24 @@ PyErr_WriteUnraisable(PyObject *obj)
if (f != NULL) {
PyFile_WriteString("Exception ", f);
if (t) {
PyFile_WriteObject(t, f, Py_PRINT_RAW);
char* className = PyExceptionClass_Name(t);
PyObject* moduleName =
PyObject_GetAttrString(t, "__module__");
if (moduleName == NULL)
PyFile_WriteString("<unknown>", f);
else {
char* modstr = PyString_AsString(moduleName);
if (modstr)
{
PyFile_WriteString(modstr, f);
PyFile_WriteString(".", f);
}
}
if (className == NULL)
PyFile_WriteString("<unknown>", f);
else
PyFile_WriteString(className, f);
if (v && v != Py_None) {
PyFile_WriteString(": ", f);
PyFile_WriteObject(v, f, 0);
@ -726,7 +746,7 @@ PyErr_SyntaxLocation(const char *filename, int lineno)
/* com_fetch_program_text will attempt to load the line of text that
the exception refers to. If it fails, it will return NULL but will
not set an exception.
not set an exception.
XXX The functionality of this function is quite similar to the
functionality in tb_displayline() in traceback.c.