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Issue #28410: Added _PyErr_FormatFromCause() -- the helper for raising

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new exception with setting current exception as __cause__.

_PyErr_FormatFromCause(exception, format, args...) is equivalent to Python

    raise exception(format % args) from sys.exc_info()[1]
This commit is contained in:
Serhiy Storchaka 2016-10-21 17:09:17 +03:00
parent b0426cd8c4
commit 467ab194fc
7 changed files with 70 additions and 53 deletions
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11
Include/pyerrors.h
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@ -255,6 +255,17 @@ PyAPI_FUNC(PyObject *) PyErr_FormatV(
va_list vargs);
#endif
#ifndef Py_LIMITED_API
/* Like PyErr_Format(), but saves current exception as __context__ and
__cause__.
*/
PyAPI_FUNC(PyObject *) _PyErr_FormatFromCause(
PyObject *exception,
const char *format, /* ASCII-encoded string */
...
);
#endif
#ifdef MS_WINDOWS
PyAPI_FUNC(PyObject *) PyErr_SetFromWindowsErrWithFilename(
int ierr,