Re: [Vala] interaction of parentheses and string template interpolation via the @ sign

[Dan Hitt <dan hitt gmail com>]

OK, thanks for the explanation.

dan

On Sat, Dec 26, 2015 at 1:29 AM, Luca Bruno <lethalman88 gmail com> wrote:
> I believe this is an issue with the lexer. Template strings are parsed at
> syntax level, not parser level, hence it may not support nested parenthesis.
>
> On Fri, Dec 25, 2015 at 8:17 PM, Dan Hitt <dan hitt gmail com> wrote:
> > If you do string interpolation via
> >     string s = @"some text $some_variable";
> > it produces a string like
> >     some text 5
> > if 5 were the value of some_variable.
> >
> > But if you put parentheses in, this gets defeated:
> >     @("some text $some_variable")
> > just becomes
> >     some text $some_variable
> > with no interpolation of the value of some_variable into the string.
> >
> > Is this intentional?
> >
> > This is with vala 0.28.1 on ubuntu 15.10.
> >
> > (And of course it is a very tiny issue, if it is an issue at all.  The
> > reason it
> > came up in the first place was i had something more complicated,
> >    @("a: $a\n" +
> >         "b: $b\n" +
> >         "c: $c\n")
> > and i was very surprised that this did not work.  It can be fixed by the
> > slightly lengthier form
> >     @"a: $a\n" +
> >     @"b: $b\n" +
> >     @"c: $c\n"
> > but i do wonder why grouping with parentheses has such a drastic effect.
> > And it also makes me wonder just what @ does and what it sees: clearly
> > it has greater visibility into its surroundings than just some function.)
> >
> > Thanks in advance for any info.
> >
> > dan
> > _______________________________________________
> > vala-list mailing list
> > vala-list gnome org
> > https://mail.gnome.org/mailman/listinfo/vala-list
>
>
>
>
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