I would also like to know about this.  For what it's worth, I also have
an extension for literal strings (the udelim package, and I've been
behind using Ā«guillemetsĀ» as nestable literal string quotes), and I
haven't figured out how to extensibly change the coloring either.  One
of my more adventurous reader extensions treats | as a normal character,
and in the interactions pane it additionally doesn't accept a line
unless it has an even number of | characters.  Is the interaction lexing
connected to the color lexing, or is that somewhere else?

Thanks,

William


On Mon, May 01, 2017 at 03:48:06PM -0700, Andrew Gwozdziewycz wrote:
Hi Brendan,

I'm wondering if you tried the here string syntax for your use case,
which other than the fact that it requires a couple of newlines seems
similar in vein to what you were going for (e.g. it doesn't escape
anything)?

```racket
#<<HI
 Any text here, and nothing gets escaped, This is somewhat surprising.
 HI
"Any text here, and nothing gets escaped. This is somewhat surprising."
```

Cheers,

Andrew

On Mon, May 1, 2017 at 2:37 PM, brendan <bren...@cannells.com> wrote:
I wrote a little Racket meta-language that adds a dispatch macro to the 
readtable for typing string literals without escape characters. You start with 
two or more #'s followed by any non-# character, then the actual string 
content, then end with the same non-# character and the same number of #'s. So

##|"foo\bar"|##

evaluates the same as

"\"foo\\bar\""

Works great, but it does wreak quite some havoc on DrRacket's syntax coloring. 
Unfortunately as far as I can tell the only way to fix that is to replace the 
color lexer entirely; there's no compositon like there is with readtables. Is 
that correct, or is there a trick that I'm missing?

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