Heregex Comment #5435
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Heregex Comment #5435
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Fixes jashkenas#5428 This fix is simple enough but it causes a substantial change in behavior for Heregexes. `#` inside of a character class shouldn't be considered a comment. By treating `#` without whitespace in front as non-comments we could have slight compatability with Python. There are other places in the CoffeeScript source where people avoided escaping the `#` by keeping it next to non-whitespace characters even outside of a character class. This is different than how Python does it and is probably a bug but maybe it is too late with the de facto CoffeeScript2 behavior. I'm not sure if this should be merged in since it changes the behavior quite a lot. Maybe another one for the CoffeeScript3/Civet bucket. Refs --- Python Docs: https://docs.python.org/3/library/re.html#re.X
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GitHub auto-closed when I rebased so re-opening. |
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The interpolation test that was changed is interesting... It's inserting a string containing a single backslash into the RegExp ahead of an escaped |
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Fixes #5428
This fix is simple enough but it causes a substantial change in behavior for Heregexes.
#inside of a character class shouldn't be considered a comment. By treating#without whitespace in front as non-comments we could have slight compatability with Python.There are other places in the CoffeeScript source where people avoided escaping the
#by keeping it next to non-whitespace characters even outside of a character class. This is different than how Python does it and is probably a bug but maybe it is too late with the de facto CoffeeScript2 behavior.I'm not sure if this should be merged in since it changes the behavior quite a lot. Maybe another one for the CoffeeScript3/Civet bucket.
Refs
Python Docs: https://docs.python.org/3/library/re.html#re.X