Raw string literals and Unicode escapes

[Remi Forax]

I'm late in the game but why not using the same system as Perl, PHP, Ruby to solve the Lts [1], i.e 
you have a sequence that says this is the starts of a raw string (%Q, qq, m) then a character (in a predefined list), the raw string and at the end of the raw string the same character as at the beginning (or its mirror). 

By example, this 'raw' as prefix for a raw string 
raw`this is a raw string` 
raw'this is another raw string' 
raw[yet another raw string] 

Rémi 

[1] https://en.wikipedia.org/wiki/Leaning_toothpick_syndrome 

> De: "John Rose" <john.r.rose at oracle.com>
> À: "Alex Buckley" <alex.buckley at oracle.com>
> Cc: "amber-spec-experts" <amber-spec-experts at openjdk.java.net>
> Envoyé: Mercredi 14 Février 2018 23:46:54
> Objet: Re: Raw string literals and Unicode escapes

> On Feb 14, 2018, at 2:42 PM, Alex Buckley < [ mailto:alex.buckley at oracle.com |
> alex.buckley at oracle.com ] > wrote:

>> Also, the inclusion of RawSP makes the lexing of RawStringLiteral ambiguous,
>> since RawStringBody allows opening and closing whitespace. No doubt this can be
>> fixed with rules involving "If the first character after RawSP is a backtick
>> ...", but now being like Markdown is getting expensive.

> These matters are already covered in the draft, under the blanket
> provision that the RSB cannot contain a close-quote sequence.
> So I don't think I swept anything under the covers there.

> A similar effect could be gotten by replacing RawSP with any
> other raw character (fixed by the JLS), such as period ``.asdf.``,
> double-quote ``"asdf"``, etc.
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