On Thu, Feb 2, 2012 at 2:00 PM, Waldemar Horwat <[email protected]> wrote:
> OK. This introduces yet another lexing context, in which all productions
> *except* QuasiMiddle and QuasiEnd are disallowed, and white space and
> comment handling is funny. That works if the expressions must be one of
> the two forms:
>
> $id
> ${expr}
>
> Is that the exhaustive list, or are we looking at other forms such as $$, $
> id.id, $id[expr], etc.?
>
I'll let Mike speak for the details of what he really wants to propose. But
here are the answers from E:
escapes with the quasi literal text are taken care of by the QuasiChar
production, much like the existing definition of DoubleStringCharacter:
QuasiChar ::
SourceCharacter but not one of $ or `
$ $
$ `
$ \ EscapeSequence
So that `$$` === "$", `$`` === "`", and `$\n` === "\n", respectively.
Regarding `...$id.id...` and `...$id[expr]...`, only the first id in each
case in in the quasiHole. All the text afterwards is part of the QuasiClose.
--
Cheers,
--MarkM
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