This is a feature.

foo = r'\nregexp'  # this is parsed as a "regexp-string"
bar = R'\nregexp'  # this is parsed as a raw string

Hello,

I'm sorry but I can't find that difference in the CPython spec.
In fact what I find in both Py2 and Py3 official docs is:

Both string and bytes literals may optionally be prefixed with a letter 'r' or 'R'; such strings are called raw strings and treat backslashes as literal characters.

...

Unless an 'r' or 'R' prefix is present, escape sequences in string and bytes literals are interpreted according to rules similar to those used by Standard C.

Please reconsider changing MagicPython behavior to be in sync with CPython.

Thanks,

JM

Hello,

I forgot to include the CPython official docs links:
https://docs.python.org/3/reference/lexical_analysis.html
and
https://docs.python.org/2/reference/lexical_analysis.html

Thanks,

JM

Please reconsider changing MagicPython behavior to be in sync with CPython.

You're correct—there's no "regex" literal in Python, and r"string" is the same thing as R"string". However, TextMate originally, and Sublime Text later both highlighted r"strings" as regular expressions for years, and a lot of users expect MagicPython to do the same, as it's positioned as a "drop in replacement" for Python syntax highlighters in those editors. Therefore, unfortunately, we are not going to reconsider having this feature in MagicPython.

Hello,

I understand.
Can I ask you please to add a Settings option to disable that behavior?

Thanks,

JM

Generally syntax highlighters don't have settings panels and aren't configurable. We had an idea how to do that for MP, but don't have time to pursue it. So unfortunately there's no ETA for this feature.