Module for a Str-like regular expression syntax. The difference can be summarised as follows.
Theses functions are similar to Str.
regexp_match ?sem r t i
tries matching r
and substrings
of t
beginning from i
. If match successes, Some g
is
returned where g
is the array containing the matched
string of n
-th group in the n
-element.
The matched string of the whole r
is stored in the 0
-th element.
If matching fails, None
is returned.
string_match r t i
tests whether r
can match a substring
of t
beginning from i
.
search_forward ?sem r t i
searches a substring of t
matching r
from i
. The returned value is similar to
URe.Type.regexp_match.