Since no actual except clause is used, this is reasonable, and I wouldn't want it changed. I guess the PEP overstated the exactness of the translation. Suggestions for better wording are accepted.
On Dec 18, 2007 10:11 AM, Mike Stall <[EMAIL PROTECTED]> wrote: > > > > > Can somebody confirm the following behavior is expected: When a 'with' > statement invokes __exit__(), it looks like sys.exc_info() is not actually > set. > > > > I know this may be a very pedantic detail, but I'm working on IronPython > and would like to make it consistent with CPython's behavior. > > > > The PEP (http://www.python.org/dev/peps/pep-0343/ ) says that 'With' can be > substituted as follows: > > > > mgr = (EXPR) > > exit = mgr.__exit__ # Not calling it yet > > value = mgr.__enter__() > > exc = True > > try: > > try: > > VAR = value # Only if "as VAR" is present > > BLOCK > > except: > > # The exceptional case is handled here > > exc = False > > if not exit(*sys.exc_info()): > > raise > > # The exception is swallowed if exit() returns true > > finally: > > # The normal and non-local-goto cases are handled here > > if exc: > > exit(None, None, None) > > > > and that "The details of the above translation are intended to prescribe the > exact semantics.". This implies that sys.exc_info() would be set when exit > is invoked. > > > > I'm finding in practice that sys.exc_info() is not set when __exit__() is > invoked in the exceptional case. I attached a simple repro (repro.py) to > demonstrate exactly what I mean. > > > > Can somebody confirm this is the expected behavior? > > > > Thanks, > > Mike > > http://blogs.msdn.com/jmstall > > > > > _______________________________________________ > Python-Dev mailing list > Python-Dev@python.org > http://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: > http://mail.python.org/mailman/options/python-dev/guido%40python.org > > -- --Guido van Rossum (home page: http://www.python.org/~guido/) _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
