Re: [Vala] How to ignore exceptions?

[pancake <pancake youterm com>]

Hi

On 31/10/2011, at 20:16, Aleksander Wabik <alex wabik gmail com> wrote:

> My 2 pennies:
>
> > What about adding a code attribute like [IgnoreException] ? that would perform better than trycatching
>
> It seems the most logical option to me. Vala is a language that allows
> ignoring exceptions, and (as far as I remember, it was a while ago when
> I was writing my vala code) it generates code printing warning about
> uncaught exception each time the exception is thrown, but not caught. I
> guess that we should have two solutions (not one or the other, but both
> implemented):
> - command line switch like -Wno-exceptions - it would disable all
>  warnings about uncaught exceptions at the compile time, and in the
>  non-debug builds it would also cause not generating code for printing
>  exception information if the exception is thrown;

Looks an ugly solution to me. Some of those exceptions are important :)

> - and some code attribute, that could be used in code, if the author is
>  100% sure that in this particular case exception will never be
>  thrown, or that it can be ignored (compile and run time behaviour the
>  same as above).

The option of allowing syntax like 

Try { ... }

Without catch looks good to me, and probably cleaner than adding a code attribute.

But i dont know of any lang that does this already.. So maybe its inconsistent


> Both these features have the advantage that no syntax changes in the
> language are needed.
>
> best regards,
>
> > On 31/10/2011, at 10:06, Xavier Bestel <xavier bestel free fr> wrote:
> >
> > > On Sun, 2011-10-30 at 11:04 -0400, Sam Wilson wrote:
> > > > Perhaps a better way to do this is like this:
> > > >
> > > > string[] test = new string[3];
> > > > for (int i = 0; i < 3; i++)
> > > > {
> > > >    try
> > > >    {
> > > >        test[i] = kf.get_string(group, key);
> > > >    }
> > > >    catch (KeyFile.Error error)
> > > >    {
> > > >        // Do nothing
> > > >    }
> > > > }
> > > > if (!test[0] && !test[1] && !test[3]) return false;
> > > >
> > > > What do you think?
> > >
> > > Won't that interrupt the execution flow, i.e. if the first
> > > g_key_file_get_string() throws an exception, the other ones won't be
> > > executed ?
> > >
> > >   Xav
> > >
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>
>
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