How is Nim regex PCRE modifier done as in Perl itself is e.g.
/foobar/i
/ foo bar /x
/foobar.*/s
etc ?
Please explain correctly doing such on Nim
Thanks much in advance
Do a Nim regex modifier just like Perl one
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2 Answers
I report the excellent answer provided by Hlaftaana to this same question on the forum: https://forum.nim-lang.org/t/8884
With re you supply a set of RegexFlag arguments to the re function, with nre you supply them inside the regex.
Example:
import re
let reg1 = re("foo bar", {reIgnoreCase, reExtended})
# or
import nre
let reg2 = re"(?ix)foo bar"
You should be using inline modifiers,
(?i)foobar
(?x)foobar
(?s)foobar
Or, modifier groups, which is especially handy when only a part of the pattern needs to be modified:
(?i:foobar)
(?x:foobar)
(?s:foobar)
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