Re: Exception Misconceptions: Exceptions are for unrecoverable
errors.
In article <70f4c8c9-4790-43ef-873d-b908c6e7ba3f@a21g2000yqc.googlegroups.com>, peter koch <peter.koch.larsen@gmail.com> wrote:
On 24 Dec., 00:51, Kaz Kylheku <kkylh...@gmail.com> wrote:
On 2009-12-23, Branimir Maksimovic <bm...@hotmail.com> wrote:
Kaz Kylheku wrote:
On 2009-12-22, Vladimir Jovic <vladasp...@gmail.com> wrote:
Stefan Ram wrote:
[snip]
More elegantly? Actually, for correct and secure C++ code,
all functions need to be written to be =BBexception safe=AB, but
only a minority of C++ programmers does so or even is aware
of it.
Why?
The above is false. Exception-safe code is needed to write code
that avoids resource leaks in the face of an exception.
For instance:
{
char *p = new char[256];
f();
}
hm , why would you do this?
To demonstrate one way in which code fails to be exception safe.
isnt't that
{
vector<char> p(256);
f();
}
is simpler?
This code no longer demonstrates a resource leak in the face of an except=
ion,
and so it would not have made a sutitable example to accompany my article=
..
Doh?
I guess what Branimir tried to tell was that you should always release
your ressources in a destructor. This gives you automatically the
basic exception guarantee.
Except that in some cases your destructor is not called.
Plus, James Kanze can tell you more about non-trivial destructors.
:--}
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