$ man perlop
:
:
               If "/" is the delimiter then the initial "m" is optiona
+l.  With
               the "m" you can use any pair of non-whitespace (ASCII)
               characters as delimiters.  This is particularly useful 
+for
               matching path names that contain "/", to avoid LTS (lea
+ning
               toothpick syndrome).  If "?" is the delimiter, then a m
+atch-
               only-once rule applies, described in "m?PATTERN?" below
+.  If
               "'" is the delimiter, no interpolation is performed on 
+the
               PATTERN.  When using a character valid in an identifier
+,
               whitespace is required after the "m".
:
:
       m?PATTERN?msixpodualgc
       ?PATTERN?msixpodualgc
               This is just like the "m/PATTERN/" search, except that 
+it
               matches only once between calls to the reset() operator
+.  This
               is a useful optimization when you want to see only the 
+first
               occurrence of something in each file of a set of files,
+ for
               instance.  Only "m??"  patterns local to the current pa
+ckage
               are reset.

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Enjoy, Have FUN! H.Merijn

In reply to Re: mysterious regexp syntax by Tux
in thread mysterious regexp syntax by grizzley

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