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8.178. re
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
runtime when using regular expressions. See the
re manpage and the section on
"Debugging regular expressions" in
the perldebug manpage for details.
- use re 'eval'
-
Permits a regular expression to contain (?{...})
zero-width 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
m// operator in list context) to be tainted.
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