String Tapas Redux: Beyond mere string interpolation

[Remi Forax]

----- Original Message -----
> From: "Tagir Valeev" <amaembo at gmail.com>
> To: "Jim Laskey" <james.laskey at oracle.com>
> Cc: "amber-spec-experts" <amber-spec-experts at openjdk.java.net>
> Sent: Vendredi 17 Septembre 2021 12:49:30
> Subject: Re: String Tapas Redux: Beyond mere string interpolation

> It's interesting that in both Scala and JavaScript when you define
> custom interpolation policy, you get a collection of Strings instead
> of a single string. So in the article, we see "error: file \{} not
> found" but in Scala/JS you would get List.of("error: file ", " not
> found")). While for localization, having a single string already baked
> might be beneficial, I think in the general case, having separate
> parts may be helpful for interpolation implementations, as no
> additional parsing (search for \{}) would be necessary. Also, the
> placeholder designation with \{} (or whatever else) is quite
> arbitrary.

As John says, the parsing will likely be done once.
And for the implementation, to avoid any handcoded bug riddled code, we can provide an iterator or something like that take care of the parsing and making it representation agnostic.

[...]

Rémi

> 
> 
> On Fri, Sep 17, 2021 at 5:38 PM Tagir Valeev <amaembo at gmail.com> wrote:
>>
>> As for custom template processing in JavaScript, see "Tagged
>> templates" section here:
>> https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals
>>
>> On Fri, Sep 17, 2021 at 2:15 PM Tagir Valeev <amaembo at gmail.com> wrote:
>> >
>> > Btw people say that Scala provides a similar mechanism using
>> > StringContext class:
>> > https://www.scala-lang.org/api/2.12.2/scala/StringContext.html
>> > In fact, Scala's `s` prefix before interpolated literal is a recipe
>> > for interpolation provided by a standard library, not by language. And
>> > it's possible to declare your own recipes. Quite similar to our
>> > proposal.
>> >
>> > Also, there's some frustration in Twitter comments regarding the
>> > article narrative like "We will do it better than existing languages"
>> > (especially because Scala was chosen as an example). Probably, the
>> > wording could be better, with more respect to other languages. Of
>> > course, this doesn't undermine the suggested feature itself, the
>> > feature is great.
>> >
>> > With best regards,
>> > Tagir Valeev.
>> >
>> > On Fri, Sep 17, 2021 at 9:35 AM Tagir Valeev <amaembo at gmail.com> wrote:
>> > >
>> > > Hello!
>> > >
>> > > Just read the proposal. I don't have any useful comments for now. For
>> > > me, the proposal looks great as is. Go ahead and implement it :D
>> > >
>> > > With best regards,
>> > > Tagir Valeev.
>> > >
>> > > On Thu, Sep 16, 2021 at 8:28 PM Jim Laskey <james.laskey at oracle.com> wrote:
>> > > >
>> > > > Amber experts,
>> > > >
>> > > > Now that JDK 17 has been plated and left the kitchen, we should have a look-see
>> > > > at one of the new menu items Brian and I have had on a slow boil for these last
>> > > > few months; Templated Strings.
>> > > >
>> > > > Before you start shouting out, "Templated Strings? This isn't what I ordered!
>> > > > The subject said string interpolation!!!", take the time to follow this link
>> > > > https://github.com/openjdk/amber-docs/tree/master/site/design-notes/templated-strings.md.
>> > > > After reading, we hope you'll see that the offering is much better than
>> > > > interpolation meat and potatoes.
>> > > >
>> > > > Cheers,
>> > > >
> > > > > -- Jim