/usr/share/highlight/langDefs/js_regex.lang is in highlight-common 3.41-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | -- a highlight lang definition for javascript regexes, by Jess Austin
Description = "Javascript Regex"
Keywords = {
{ -- backslash literals
Id = 1,
Regex = [=[\\.]]=]
},
{ -- character classes
Id = 2,
Regex = [[ (\:(alnum|alpha|blank|cntrl|graph|print|punct|xdigit|unicode|word|space|digit|lower|upper)\:) ]], Group=1
}
}
Strings = { -- character sets
DelimiterPairs = { { Open = "\\[", Close = "\\]" } },
Escape = [=[\\u\{[[:xdigit:]]+\}|\\u[[:xdigit:]]{4}|\\x[[:xdigit:]]{2}|\\c[A-Z]|\\[[bBdDsSwWtrnvf0]]=],
}
Operators = [[\.|\+|\*|\^|\$|\||\?:|\?=|\?!|\?|\(|\)]]
Digits = [[\{\d+,?\d*\}]] -- integer quantifierso
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