Lines Matching full:expressions
89 * Extended regexps:: @command{egrep}-style regular expressions
91 * Perl regexps:: Perl-style regular expressions
104 * Regular Expressions:: Overview of regular expression syntax
132 Perl regexps:: Perl-style regular expressions
325 @cindex Extended regular expressions, choosing
326 @cindex @acronym{GNU} extensions, extended regular expressions
327 Use extended regular expressions rather than basic
328 regular expressions. Extended regexps are those that
332 @xref{Extended regexps, , Extended regular expressions}.
339 @cindex Perl-style regular expressions, choosing
340 @cindex @value{SSEDEXT}, Perl-style regular expressions
341 Use Perl-style regular expressions rather than basic
342 regular expressions. Perl-style regexps are extremely
345 Perl-style regular expressions}.
407 * Regular Expressions:: Overview of regular expression syntax
498 passed to the @code{s} command). Note that modifiers to regular expressions
505 @cindex Slash character, in regular expressions
517 @cindex Perl-style regular expressions, case-insensitive
528 @cindex Perl-style regular expressions, multiline
548 @cindex Perl-style regular expressions, single line
558 @cindex Perl-style regular expressions, extended
637 @node Regular Expressions
641 expressions (@dfn{regexp} for short). A regular expression
654 itself. The power of regular expressions comes from the
666 @cindex @acronym{GNU} extensions, to basic regular expressions
679 @cindex @acronym{GNU} extensions, to basic regular expressions
683 @cindex @acronym{GNU} extensions, to basic regular expressions
702 @cindex @acronym{GNU} extensions, to basic regular expressions
761 @cindex @code{POSIXLY_CORRECT} behavior, bracket expressions
774 @cindex @acronym{GNU} extensions, to basic regular expressions
776 parentheses to use complex alternative regular expressions.
972 @cindex Backreferences, in regular expressions
1082 @cindex Perl-style regular expressions, case-insensitive
1092 @cindex Perl-style regular expressions, multiline
1113 @cindex Perl-style regular expressions, single line
1123 @cindex Perl-style regular expressions, extended
1508 @section @acronym{GNU} Extensions for Escapes in Regular Expressions
1522 bracket expressions.}---that
1583 regular expressions:
1659 the regular expressions to be matched---this is a common
2699 regular expressions.}, assertions, and other types of
2709 regular expressions and those that @option{-R} recognizes.
2855 @cindex @acronym{GNU} extensions, to basic regular expressions
2864 expressions, @command{sed} interprets these escape sequences as special
2973 @appendix Extended regular expressions
2974 @cindex Extended regular expressions, syntax
2976 The only difference between basic and extended regular expressions is in
2978 and braces (@samp{@{@}}). While basic regular expressions require
2980 when using extended regular expressions you must escape them if
2987 becomes @samp{abc\?} when using extended regular expressions. It matches
2991 becomes @samp{c+} when using extended regular expressions. It matches
2995 becomes @samp{a@{3,@}} when using extended regular expressions. It matches
2999 becomes @samp{(abc)@{2,3@}} when using extended regular expressions. It
3003 becomes @samp{(abc*)\1} when using extended regular expressions.
3005 expressions.
3010 @appendix Perl-style regular expressions
3011 @cindex Perl-style regular expressions, syntax
3016 Perl introduced several extensions to regular expressions, some
3017 of them incompatible with the syntax of regular expressions
3095 @cindex Perl-style regular expressions, escaped sequences
3111 @cindex Perl-style regular expressions, backreferences
3158 @cindex Perl-style regular expressions, character classes
3179 @cindex Perl-style regular expressions, assertions
3223 @cindex Perl-style regular expressions, newlines
3249 @cindex Perl-style regular expressions, multiline
3261 @cindex Perl-style regular expressions, multiline
3267 @cindex Perl-style regular expressions, single line
3279 @cindex Perl-style regular expressions, character classes
3304 @cindex Perl-style regular expressions, case-insensitive
3311 @cindex Perl-style regular expressions, single line
3312 @cindex Perl-style regular expressions, multiline
3427 @cindex Perl-style regular expressions, toggling options
3428 @cindex Perl-style regular expressions, case-insensitive
3429 @cindex Perl-style regular expressions, multiline
3430 @cindex Perl-style regular expressions, single line
3431 @cindex Perl-style regular expressions, extended
3506 @cindex Perl-style regular expressions, non-capturing subpatterns
3563 @cindex Perl-style regular expressions, repetitions
3655 @cindex Perl-style regular expressions, stingy repetitions
3713 @cindex Perl-style regular expressions, single line
3745 @cindex Perl-style regular expressions, backreferences
3828 @cindex Perl-style regular expressions, assertions
3829 @cindex Perl-style regular expressions, asserting subpatterns
3839 @cindex Perl-style regular expressions, lookahead subpatterns
3868 @cindex Perl-style regular expressions, lookbehind subpatterns
3983 @cindex Perl-style regular expressions, non-backtracking subpatterns
4031 @cindex Perl-style regular expressions, lookbehind subpatterns
4117 @cindex Perl-style regular expressions, conditional subpatterns
4159 @cindex Perl-style regular expressions, lookahead subpatterns
4182 @cindex Perl-style regular expressions, recursive patterns
4183 @cindex Perl-style regular expressions, recursion
4191 expressions to recurse (amongst other things). It does this
4249 @cindex Perl-style regular expressions, comments
4256 @cindex Perl-style regular expressions, extended
