[swift-evolution] [Accepted] SE-0168: Multi-Line String Literals

[Xiaodi Wu]

On Wed, Apr 19, 2017 at 5:09 PM, Joe Groff <jgroff at apple.com> wrote:

>
> On Apr 19, 2017, at 3:07 PM, Xiaodi Wu <xiaodi.wu at gmail.com> wrote:
>
> Hmm, I don't know that I agree. What's the harm of trailing spaces, and if
> a warning, how would I silence it given that \ is rejected as a way to
> suppress a literal newline?
>
>
> \("") comes to mind, if nothing else.
>

Good point.

Other common tools like Git already flag trailing whitespace by default, so
> even if Swift doesn't warn about it, you might still need to satisfy other
> tools in your pipeline.
>

Isn't that an equally good argument for Swift *not* warning you about it?
If it's harmful, you'll have other tools in the pipeline to flag it for you.


> -Joe
>
>
> On Wed, Apr 19, 2017 at 17:02 Joe Groff via swift-evolution <
> swift-evolution at swift.org> wrote:
>
>> On Apr 19, 2017, at 2:43 PM, Adrian Zubarev <adrian.zubarev at devandartist.
>> com> wrote:
>>
>> First of all, thank you for accepting the proposal. However I still have
>> one single concern left about the trailing whitespaces. Will the final
>> implemented version raise a warning or produce an error when there are
>> trailing whitespaces?
>>
>> The whole idea of a trailing \ was in first place to prevent new line
>> injection but also for trailing whitespace character precision.
>>
>> The following example could have 1000 characters, but a different
>> developer who reads the code wouldn’t even notice.
>>
>> """
>> Foo<space><space>…<space>
>> Bar
>> """
>>
>> That’s what the trailing backslash was meant for. To prevent unwanted
>> whitespaces, or if you really need them, to force you to be precise about
>> them.
>>
>> """
>> Foo<space><space><space>\n\
>> Bar
>> """
>>
>> That seems like a reasonable thing to warn about. That also reminds me,
>> blank lines should be accepted within a literal even if they aren't
>> "indented" with invisible whitespace.
>>
>> -Joe
>>
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>
>
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