$var !~ /foo/;
-C<m/pattern/msixpogcdual> searches a string for a pattern match,
+C<m/pattern/msixpogcdualn> searches a string for a pattern match,
applying the given options.
m Multiline mode - ^ and $ match internal lines
u match according to Unicode rules
d match according to native rules unless something indicates
Unicode
+ n Non-capture mode. Don't let () fill in $1, $2, etc...
If 'pattern' is an empty string, the last I<successfully> matched
regex is used. Delimiters other than '/' may be used for both this
operator and the following ones. The leading C<m> can be omitted
if the delimiter is '/'.
-C<qr/pattern/msixpodual> lets you store a regex in a variable,
+C<qr/pattern/msixpodualn> lets you store a regex in a variable,
or pass one around. Modifiers as for C<m//>, and are stored
within the regex.