Pragma that lets you alter the behavior of regular expressions.
Permits the following alterations:
use re 'debug'
Causes Perl to produce debugging messages when compiling and at run
time when using
regular expressions. See the
manpage and the
section on "Debugging regular expressions"
manpage for details.
use re 'eval'
Permits a regular expression to contain
assertion even if the regular expression contains variable interpolation,
which normally isn't permitted for security reasons. The pragma is ignored
if the regular expression comes from tainted data.
use re 'taint'
When a tainted string is the target of a regular expression, causes
the regular expression memories (or
the values returned by the
operator in list context) to be