Lines Matching full:perl
89 @ifset PERL
90 * Perl regexps:: Perl-style regular expressions
130 @ifset PERL
131 Perl regexps:: Perl-style regular expressions
260 @cindex In-place editing, Perl-style backup file names
333 @ifset PERL
335 @itemx --regexp-perl
337 @opindex --regexp-perl
338 @cindex Perl-style regular expressions, choosing
339 @cindex @value{SSEDEXT}, Perl-style regular expressions
340 Use Perl-style regular expressions rather than basic
341 regular expressions. Perl-style regexps are extremely
343 use it are not portable. @xref{Perl regexps, ,
344 Perl-style regular expressions}.
515 @ifset PERL
516 @cindex Perl-style regular expressions, case-insensitive
524 @ifset PERL
527 @cindex Perl-style regular expressions, multiline
533 @ifset PERL
534 (@code{\A} and @code{\Z} in Perl mode, @code{\`} and @code{\'}
537 @ifclear PERL
543 @ifset PERL
547 @cindex Perl-style regular expressions, single line
549 in Perl mode and specifies that the dot character (@code{.}) will
553 @ifset PERL
557 @cindex Perl-style regular expressions, extended
559 valid in Perl mode only. If it is used, whitespace in the
1080 @ifset PERL
1081 @cindex Perl-style regular expressions, case-insensitive
1090 @ifset PERL
1091 @cindex Perl-style regular expressions, multiline
1098 @ifset PERL
1099 (@code{\A} and @code{\Z} in Perl mode, @code{\`} and @code{\'}
1102 @ifclear PERL
1108 @ifset PERL
1112 @cindex Perl-style regular expressions, single line
1114 in Perl mode and specifies that the dot character (@code{.}) will
1118 @ifset PERL
1122 @cindex Perl-style regular expressions, extended
1124 valid in Perl mode only. If it is used, whitespace in the
1332 or Perl. But occasionally one is committed to sticking
1564 @ifset PERL
1568 @ifset PERL
1569 The syntax without the @code{o} is active in Perl mode, while the one
1611 @ifset PERL
1950 @ifset PERL
2523 @ifset PERL
2531 distinction is meaningful when referring to Perl-style
2541 Here are a few distinctions between the real Perl-style
2547 Perl permits them, but they do not mean what you
2556 Perl sets its numerical variables from any such patterns
2562 The following Perl escape sequences are not supported:
2564 @samp{\Q}. In fact these are implemented by Perl's general
2568 The Perl @samp{\G} assertion is not supported as it is not
2574 support for recursive patterns using the non-Perl item @samp{(?R)}.
2577 There are at the time of writing some oddities in Perl
2586 In Perl 5.004 @samp{$2} is set in both cases, and that is also
2590 Another as yet unresolved discrepancy is that in Perl
2593 However, in both Perl and @value{SSED} @samp{/^(a)?a/} matched
2707 @ifset PERL
2765 @ifclear PERL
2841 @ifset PERL
2842 @node Perl regexps
2843 @appendix Perl-style regular expressions
2844 @cindex Perl-style regular expressions, syntax
2849 Perl introduced several extensions to regular expressions, some
2906 On one hand Perl introduces several more escaped sequences
2928 @cindex Perl-style regular expressions, escaped sequences
2931 sequences in Perl mode.
2944 @cindex Perl-style regular expressions, backreferences
2991 @cindex Perl-style regular expressions, character classes
3000 In Perl mode, these character type sequences can appear both inside and
3006 Perl mode. An assertion specifies a condition that has to be met
3012 @cindex Perl-style regular expressions, assertions
3042 Note that Perl mode does not support directly assertions
3056 @cindex Perl-style regular expressions, newlines
3082 @cindex Perl-style regular expressions, multiline
3094 @cindex Perl-style regular expressions, multiline
3100 @cindex Perl-style regular expressions, single line
3112 @cindex Perl-style regular expressions, character classes
3137 @cindex Perl-style regular expressions, case-insensitive
3144 @cindex Perl-style regular expressions, single line
3145 @cindex Perl-style regular expressions, multiline
3193 Perl 5.6 supports the @sc{posix} notation for character classes, which
3248 Perl mode. Another Perl extension is negation, which is
3260 @cindex Perl-style regular expressions, toggling options
3261 @cindex Perl-style regular expressions, case-insensitive
3262 @cindex Perl-style regular expressions, multiline
3263 @cindex Perl-style regular expressions, single line
3264 @cindex Perl-style regular expressions, extended
3268 a sequence of Perl option letters enclosed between @code{(?}
3300 is different. This is a change of behaviour in Perl 5.005.
3329 that can be changed in the same way as the Perl-compatible options by
3339 @cindex Perl-style regular expressions, non-capturing subpatterns
3396 @cindex Perl-style regular expressions, repetitions
3481 Earlier versions of Perl used to give an error at
3488 @cindex Perl-style regular expressions, stingy repetitions
3535 available in Perl), the quantifiers are not greedy by
3546 @cindex Perl-style regular expressions, single line
3578 @cindex Perl-style regular expressions, backreferences
3661 @cindex Perl-style regular expressions, assertions
3662 @cindex Perl-style regular expressions, asserting subpatterns
3672 @cindex Perl-style regular expressions, lookahead subpatterns
3701 @cindex Perl-style regular expressions, lookbehind subpatterns
3719 compared with Perl 5.005, which requires all branches to match
3816 @cindex Perl-style regular expressions, non-backtracking subpatterns
3864 @cindex Perl-style regular expressions, lookbehind subpatterns
3934 because both @value{SSED} and Perl have an optimization that allows
3950 @cindex Perl-style regular expressions, conditional subpatterns
3992 @cindex Perl-style regular expressions, lookahead subpatterns
4015 @cindex Perl-style regular expressions, recursive patterns
4016 @cindex Perl-style regular expressions, recursion
4022 possible to handle an arbitrary nesting depth. Perl 5.6 has
4025 by interpolating Perl code in the expression at run time,
4026 and the code can refer to the expression itself. A Perl pattern
4034 The @code{(?p@{...@})} item interpolates Perl code at run time,
4037 Perl code. Instead, the special item @code{(?R)} is provided for
4082 @cindex Perl-style regular expressions, comments
4089 @cindex Perl-style regular expressions, extended
