Re: Raw string literals in Emacs lisp.

[Matthew Plant <maplant2@illinois.edu>]

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If it can be parsed forwards it can be parsed backwards, although it might
not be immediately possible to do so. The parser might have to check to see
if it needs to re-parse a section, but I don't think there's any syntax we
could introduce that is impossible to parse backwards. It's a difficulty
thing.

However, a regex syntax would be much more difficult to parse backwards; I
think this is a convincing enough argument that only simple raw strings
should be implemented.

Pretty much every modern language that has regex has raw string literals.
Heck, when regex was added to the C++ standard, raw string literals where
added in the same spec.

If raw string literals were added, should they allow custom delimiters?
This would probably make the strings just as hard to parse backwards as
regexps, so I say no.

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