Any reason template string with empty interpolation placeholder (`${}`) throws?

[Mark S. Miller]

On Thu, Oct 22, 2015 at 8:54 PM, Caitlin Potter <caitpotter88 at gmail.com>
wrote:

> > JavaScript does not have string interpolation. It has arbitrary value
> interpolation.
>
> Disagree. `foo ${bar} baz` is string interpolation. `${bar}` becomes
> `ToString(bar)`. Tagged templates were an addition
>

That is not the history.



> that weren’t really needed.
>

Disagree. They were and are the main motivation. The fact that the unmarked
case does string interpolation is just icing on the cake.




> Since they exist, great, people can come up with some clever uses for
> them. But they’re hardly the common use case, which is definitely string
> interpolation
>
> On Oct 22, 2015, at 8:43 PM, Mark S. Miller <erights at google.com> wrote:
>
> JavaScript does not have string interpolation. It has arbitrary value
> interpolation.
>
>
> On Thu, Oct 22, 2015 at 8:34 PM, Caitlin Potter <caitpotter88 at gmail.com>
> wrote:
>
>> Okay, but usability wise, this kind of sucks. There's a reason it's not
>> what people expect, and why other languages with string interpolation
>> behave differently.
>>
>> On Oct 22, 2015, at 8:24 PM, Allen Wirfs-Brock <
>> allen.wirfsbrock at gmail.com> wrote:
>>
>>
>> On Oct 22, 2015, at 4:55 PM, Mark Miller <erights at gmail.com> wrote:
>>
>>
>>
>> On Thu, Oct 22, 2015 at 7:20 PM, Caitlin Potter <caitpotter88 at gmail.com>
>> wrote:
>>
>>> Cute, but nobody is realistically going to do that.
>>>
>>
>> Since `${}` is a static error, what do you realistically think people
>> will do? Especially if they meant `${''}`, how do you expect them to react
>> to the static error?
>>
>>
>> Just like they do if they have a line of code that reads:
>>
>> ```js
>> str = ;
>> ```
>>
>> when they meant
>>
>> ```js
>> str = ‘’;
>> ```
>>
>> It’s just a syntax error.  I probably have syntax errors in 50% of the
>> lines that I initially type.  I parse, and then fix.
>>
>> Allen
>>
>>
>
>
> --
>     Cheers,
>     --MarkM
>
>
>


-- 
    Cheers,
    --MarkM
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