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authordkf <donal.k.fellows@manchester.ac.uk>2007-10-29 01:42:18 (GMT)
committerdkf <donal.k.fellows@manchester.ac.uk>2007-10-29 01:42:18 (GMT)
commit71f78ed1de764f208d95b703744c7682d448c3e3 (patch)
tree8e72d3dd4068fc22320de66ab7145fa75119f54c /doc/regexp.n
parentccacc920f9cd610a9a9d8e800f623c20bf43a702 (diff)
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Next stage of doing GOOBE improvements to documentation now that the html generation works
Diffstat (limited to 'doc/regexp.n')
-rw-r--r--doc/regexp.n43
1 files changed, 31 insertions, 12 deletions
diff --git a/doc/regexp.n b/doc/regexp.n
index d626e37..f7baefa 100644
--- a/doc/regexp.n
+++ b/doc/regexp.n
@@ -4,7 +4,7 @@
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
-'\" RCS: @(#) $Id: regexp.n,v 1.24 2007/10/28 14:17:40 dkf Exp $
+'\" RCS: @(#) $Id: regexp.n,v 1.25 2007/10/29 01:42:19 dkf Exp $
'\"
.so man.macros
.TH regexp n 8.3 Tcl "Tcl Built-In Commands"
@@ -20,7 +20,7 @@ regexp \- Match a regular expression against a string
.SH DESCRIPTION
.PP
Determines whether the regular expression \fIexp\fR matches part or
-all of \fIstring\fR and returns 1 if it does, 0 if it doesn't, unless
+all of \fIstring\fR and returns 1 if it does, 0 if it does not, unless
\fB-inline\fR is specified (see below).
(Regular expression matching is described in the \fBre_syntax\fR
reference page.)
@@ -62,20 +62,37 @@ range of characters.
\fB\-line\fR
Enables newline-sensitive matching. By default, newline is a
completely ordinary character with no special meaning. With this
-flag, `[^' bracket expressions and `.' never match newline, `^'
+flag,
+.QW [^
+bracket expressions and
+.QW .
+never match newline,
+.QW ^
matches an empty string after any newline in addition to its normal
-function, and `$' matches an empty string before any newline in
+function, and
+.QW $
+matches an empty string before any newline in
addition to its normal function. This flag is equivalent to
specifying both \fB\-linestop\fR and \fB\-lineanchor\fR, or the
\fB(?n)\fR embedded option (see the \fBre_syntax\fR manual page).
.TP 15
\fB\-linestop\fR
-Changes the behavior of `[^' bracket expressions and `.' so that they
+Changes the behavior of
+.QW [^
+bracket expressions and
+.QW .
+so that they
stop at newlines. This is the same as specifying the \fB(?p)\fR
embedded option (see the \fBre_syntax\fR manual page).
.TP 15
\fB\-lineanchor\fR
-Changes the behavior of `^' and `$' (the ``anchors'') so they match the
+Changes the behavior of
+.QW ^
+and
+.QW $
+(the
+.QW anchors )
+so they match the
beginning and end of a line respectively. This is the same as
specifying the \fB(?w)\fR embedded option (see the \fBre_syntax\fR
manual page).
@@ -112,7 +129,8 @@ matching the regular expression at.
The \fIindex\fR value is interpreted in the same manner
as the \fIindex\fR argument to \fBstring index\fR.
.VE 8.5
-When using this switch, `^'
+When using this switch,
+.QW ^
will not match the beginning of the line, and \eA will still
match the start of the string at \fIindex\fR. If \fB\-indices\fR
is specified, the indices will be indexed starting from the
@@ -123,12 +141,13 @@ absolute beginning of the input string.
Marks the end of switches. The argument following this one will
be treated as \fIexp\fR even if it starts with a \fB\-\fR.
.PP
-If there are more \fIsubMatchVar\fR's than parenthesized
+If there are more \fIsubMatchVar\fRs than parenthesized
subexpressions within \fIexp\fR, or if a particular subexpression
-in \fIexp\fR doesn't match the string (e.g. because it was in a
-portion of the expression that wasn't matched), then the corresponding
-\fIsubMatchVar\fR will be set to ``\fB\-1 \-1\fR'' if \fB\-indices\fR
-has been specified or to an empty string otherwise.
+in \fIexp\fR does not match the string (e.g. because it was in a
+portion of the expression that was not matched), then the corresponding
+\fIsubMatchVar\fR will be set to
+.QW "\fB\-1 \-1\fR"
+if \fB\-indices\fR has been specified or to an empty string otherwise.
.SH EXAMPLES
Find the first occurrence of a word starting with \fBfoo\fR in a
string that is not actually an instance of \fBfoobar\fR, and get the