Add more escape code parsing

risor-io / risor

Fast and flexible scripting for Go developers and DevOps.

https://risor.io

Apache License 2.0

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Add more escape code parsing #122

Closed applejag closed 9 months ago

applejag commented 9 months ago

Changes:

Treat unknown escapes as error
Added new single char escape codes:
- Alert: \a
- Backspace: \b
- Form feed: \f
- Vertical tab: \v
- Escape: \e
Added multi-char escaping:
- Hex: \xff
- Unicode 16-bit: \u1234
- Unicode 32-bit: \U12345678
- Octal: \012

Closes #119

The original issue did not mention the other single-char escape codes, but I added them in just for consistency, as pretty much all other languages have escape codes for them too.

myzie commented 9 months ago

I gave this a quick try and it looks great. I'll review the lexer code updates more closely before merging but everything looks good from a user's point of view. Nice work!