2 '\" Copyright (c) 1998 Sun Microsystems, Inc.
4 '\" See the file "license.terms" for information on usage and redistribution
5 '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
7 '\" RCS: @(#) $Id: regexp.n,v 1.12 2002/10/10 14:46:57 dgp Exp $
9 '\" The definitions below are for supplemental macros used in Tcl/Tk
12 '\" .AP type name in/out ?indent?
13 '\" Start paragraph describing an argument to a library procedure.
14 '\" type is type of argument (int, etc.), in/out is either "in", "out",
15 '\" or "in/out" to describe whether procedure reads or modifies arg,
16 '\" and indent is equivalent to second arg of .IP (shouldn't ever be
17 '\" needed; use .AS below instead)
20 '\" Give maximum sizes of arguments for setting tab stops. Type and
21 '\" name are examples of largest possible arguments that will be passed
22 '\" to .AP later. If args are omitted, default tab stops are used.
25 '\" Start box enclosure. From here until next .BE, everything will be
26 '\" enclosed in one large box.
29 '\" End of box enclosure.
32 '\" Begin code excerpt.
37 '\" .VS ?version? ?br?
38 '\" Begin vertical sidebar, for use in marking newly-changed parts
39 '\" of man pages. The first argument is ignored and used for recording
40 '\" the version when the .VS was added, so that the sidebars can be
41 '\" found and removed when they reach a certain age. If another argument
42 '\" is present, then a line break is forced before starting the sidebar.
45 '\" End of vertical sidebar.
48 '\" Begin an indented unfilled display.
51 '\" End of indented unfilled display.
54 '\" Start of list of standard options for a Tk widget. The
55 '\" options follow on successive lines, in four columns separated
59 '\" End of list of standard options for a Tk widget.
61 '\" .OP cmdName dbName dbClass
62 '\" Start of description of a specific option. cmdName gives the
63 '\" option's name as specified in the class command, dbName gives
64 '\" the option's name in the option database, and dbClass gives
65 '\" the option's class in the option database.
68 '\" Print arg1 underlined, then print arg2 normally.
70 '\" RCS: @(#) $Id: man.macros,v 1.4 2000/08/25 06:18:32 ericm Exp $
72 '\" # Set up traps and other miscellaneous stuff for Tcl/Tk man pages.
76 '\" # Start an argument description
80 . ie !"\\$2"" .TP \\n()Cu
85 \&\\$1 \\fI\\$2\\fP (\\$3)
98 '\" # define tabbing values for .AP
101 .if !"\\$1"" .nr )A \\w'\\$1'u+3n
104 .if !"\\$2"" .nr )B \\w'\\$2'u+\\n()Au+3n
105 .nr )C \\n()Bu+\\w'(in/out)'u+2n
107 .AS Tcl_Interp Tcl_CreateInterp in/out
108 '\" # BS - start boxed text
109 '\" # ^y = starting y location
117 .if n \l'\\n(.lu\(ul'
120 '\" # BE - end boxed text (draw box now)
125 .ie n \l'\\n(^lu\(ul'
127 .\" Draw four-sided box normally, but don't draw top of
128 .\" box if the box started on an earlier page.
130 \h'-1.5n'\L'|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\l'|0u-1.5n\(ul'
133 \h'-1.5n'\L'|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\l'|0u-1.5n\(ul'
140 '\" # VS - start vertical sidebar
141 '\" # ^Y = starting y location
142 '\" # ^v = 1 (for troff; for nroff this doesn't matter)
146 .ie n 'mc \s12\(br\s0
149 '\" # VE - end of vertical sidebar
157 \h'|\\n(^lu+3n'\L'|\\n(^Yu-1v\(bv'\v'\\n(^tu+1v-\\n(^Yu'\h'-|\\n(^lu+3n'
164 '\" # Special macro to handle page bottom: finish off current
165 '\" # box/sidebar if in box/sidebar mode, then invoked standard
166 '\" # page bottom macro.
173 .\" Draw three-sided box if this is the box's first page,
174 .\" draw two sides but no top otherwise.
175 .ie !\\n(^b-1 \h'-1.5n'\L'|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\h'|0u'\c
176 .el \h'-1.5n'\L'|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\h'|0u'\c
179 .nr ^x \\n(^tu+1v-\\n(^Yu
180 \kx\h'-\\nxu'\h'|\\n(^lu+3n'\ky\L'-\\n(^xu'\v'\\n(^xu'\h'|0u'\c
193 '\" # DS - begin display
199 '\" # DE - end display
205 '\" # SO - start of list of standard options
207 .SH "STANDARD OPTIONS"
213 '\" # SE - end of list of standard options
218 See the \\fBoptions\\fR manual entry for details on the standard options.
220 '\" # OP - start of full description for a single option
225 Command-Line Name: \\fB\\$1\\fR
226 Database Name: \\fB\\$2\\fR
227 Database Class: \\fB\\$3\\fR
231 '\" # CS - begin code excerpt
237 '\" # CE - end code excerpt
245 .TH regexp n 8.3 Tcl "Tcl Built-In Commands"
247 '\" Note: do not modify the .SH NAME line immediately below!
249 regexp \- Match a regular expression against a string
252 \fBregexp \fR?\fIswitches\fR? \fIexp string \fR?\fImatchVar\fR? ?\fIsubMatchVar subMatchVar ...\fR?
257 Determines whether the regular expression \fIexp\fR matches part or
258 all of \fIstring\fR and returns 1 if it does, 0 if it doesn't, unless
259 \fB-inline\fR is specified (see below).
260 (Regular expression matching is described in the \fBre_syntax\fR
263 If additional arguments are specified after \fIstring\fR then they
264 are treated as the names of variables in which to return
265 information about which part(s) of \fIstring\fR matched \fIexp\fR.
266 \fIMatchVar\fR will be set to the range of \fIstring\fR that
267 matched all of \fIexp\fR. The first \fIsubMatchVar\fR will contain
268 the characters in \fIstring\fR that matched the leftmost parenthesized
269 subexpression within \fIexp\fR, the next \fIsubMatchVar\fR will
270 contain the characters that matched the next parenthesized
271 subexpression to the right in \fIexp\fR, and so on.
273 If the initial arguments to \fBregexp\fR start with \fB\-\fR then
274 they are treated as switches. The following switches are
278 Instead of attempting to match the regular expression, returns a list
279 containing information about the regular expression. The first
280 element of the list is a subexpression count. The second element is a
281 list of property names that describe various attributes of the regular
282 expression. This switch is primarily intended for debugging purposes.
285 Enables use of the expanded regular expression syntax where
286 whitespace and comments are ignored. This is the same as specifying
287 the \fB(?x)\fR embedded option (see the \fBre_syntax\fR manual page).
290 Changes what is stored in the \fIsubMatchVar\fRs.
291 Instead of storing the matching characters from \fIstring\fR,
293 will contain a list of two decimal strings giving the indices
294 in \fIstring\fR of the first and last characters in the matching
298 Enables newline-sensitive matching. By default, newline is a
299 completely ordinary character with no special meaning. With this
300 flag, `[^' bracket expressions and `.' never match newline, `^'
301 matches an empty string after any newline in addition to its normal
302 function, and `$' matches an empty string before any newline in
303 addition to its normal function. This flag is equivalent to
304 specifying both \fB\-linestop\fR and \fB\-lineanchor\fR, or the
305 \fB(?n)\fR embedded option (see the \fBre_syntax\fR manual page).
308 Changes the behavior of `[^' bracket expressions and `.' so that they
309 stop at newlines. This is the same as specifying the \fB(?p)\fR
310 embedded option (see the \fBre_syntax\fR manual page).
313 Changes the behavior of `^' and `$' (the ``anchors'') so they match the
314 beginning and end of a line respectively. This is the same as
315 specifying the \fB(?w)\fR embedded option (see the \fBre_syntax\fR
319 Causes upper-case characters in \fIstring\fR to be treated as
320 lower case during the matching process.
324 Causes the regular expression to be matched as many times as possible
325 in the string, returning the total number of matches found. If this
326 is specified with match variables, they will contain information for
330 Causes the command to return, as a list, the data that would otherwise
331 be placed in match variables. When using \fB-inline\fR,
332 match variables may not be specified. If used with \fB-all\fR, the
333 list will be concatenated at each iteration, such that a flat list is
334 always returned. For each match iteration, the command will append the
335 overall match data, plus one element for each subexpression in the
336 regular expression. Examples are:
338 regexp -inline -- {\\w(\\w)} " inlined "
340 regexp -all -inline -- {\\w(\\w)} " inlined "
344 \fB\-start\fR \fIindex\fR
345 Specifies a character index offset into the string to start
346 matching the regular expression at. When using this switch, `^'
347 will not match the beginning of the line, and \\A will still
348 match the start of the string at \fIindex\fR. If \fB\-indices\fR
349 is specified, the indices will be indexed starting from the
350 absolute beginning of the input string.
351 \fIindex\fR will be constrained to the bounds of the input string.
355 Marks the end of switches. The argument following this one will
356 be treated as \fIexp\fR even if it starts with a \fB\-\fR.
358 If there are more \fIsubMatchVar\fR's than parenthesized
359 subexpressions within \fIexp\fR, or if a particular subexpression
360 in \fIexp\fR doesn't match the string (e.g. because it was in a
361 portion of the expression that wasn't matched), then the corresponding
362 \fIsubMatchVar\fR will be set to ``\fB\-1 \-1\fR'' if \fB\-indices\fR
363 has been specified or to an empty string otherwise.
366 re_syntax(n), regsub(n)
369 match, regular expression, string