@bablr/language-en-regex-vm-pattern v0.9.0

@bablr/language-en-regex-vm-pattern

This BABLR grammar defines a subset of regex that is safe to use in a nonbacktracking regex engine, in particular @bablr/regex-vm.

The language

The language is the same as Javascript Regex except for these deifferences:

• Expressions always use "unicode mode" escaping rules. Only valid escapes are syntactically legal.

• Expressions do not support lookbehind (/(?<=abc)/ and /(?<!abc)/).

• Expressions do not (and will not) support backreferences (/(.)\0/).

• Expressions do not support lookahead (yet) (/(?=abc)/ and /(?!abc)/). See #11.

• Expressions do not support named capture groups (/(?<name>)/) (yet).