Re: [basic-improvements] try/finally support for c/c++ - more tests

[Mark Mitchell <mark@codesourcery.com>]

--On Wednesday, November 06, 2002 12:43:04 PM -0500 Jakub Jelinek 
<jakub@redhat.com> wrote:

> Hi!
>
> On Tue, Nov 05, 2002 at 03:19:02PM -0800, Aldy Hernandez wrote:
>> As promised.  Here are the try/finally patches for C and C++.

I've been offline for a few days, and am trying to catch up on email,
not to mention the release.  So, I apologize for jumping in late.

But, I do not approve of adding try/finally to C and/or C++ until
and unless ISO adds it.

There is nothing you can do with try/finally in C++ you can't already
do:

  try { X } finally { Y }

can always be replaced with either of:

(1) try { X } catch (...) { Y; throw; } Y;

or:

(2) { struct S { ~S() { Y } } s; X }

depending on your stylistic preference.

These examples show that Richard's point about needing to deal with
unknown exception types is moot; the use of ... already allows you
to avoid knowing the type.

I do not think we should add exception support of any kind to GNU C; use
C++ if you want exceptions.

Please do not check in these patches until we've had a chance to hash
this out more fully.

If we do want to check these patches in, the semantics should be given
in terms of translation to (1) above.

-- 
Mark Mitchell                mark@codesourcery.com
CodeSourcery, LLC            http://www.codesourcery.com