diff options
Diffstat (limited to 'doc/regsub.n')
| -rw-r--r-- | doc/regsub.n | 41 |
1 files changed, 26 insertions, 15 deletions
diff --git a/doc/regsub.n b/doc/regsub.n index 90e7d88..ef4c289 100644 --- a/doc/regsub.n +++ b/doc/regsub.n @@ -54,8 +54,9 @@ backslashes. If the initial arguments to \fBregsub\fR start with \fB\-\fR then they are treated as switches. The following switches are currently supported: -.TP 10 +.TP \fB\-all\fR +. All ranges in \fIstring\fR that match \fIexp\fR are found and substitution is performed for each of these ranges. Without this switch only the first @@ -66,13 +67,15 @@ and .QW \e\fIn\fR sequences are handled for each substitution using the information from the corresponding match. -.TP 15 +.TP \fB\-expanded\fR +. Enables use of the expanded regular expression syntax where whitespace and comments are ignored. This is the same as specifying the \fB(?x)\fR embedded option (see the \fBre_syntax\fR manual page). -.TP 15 +.TP \fB\-line\fR +. Enables newline-sensitive matching. By default, newline is a completely ordinary character with no special meaning. With this flag, .QW [^ @@ -87,8 +90,9 @@ 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 +.TP \fB\-linestop\fR +. Changes the behavior of .QW [^ bracket expressions and @@ -96,8 +100,9 @@ bracket expressions and 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 +.TP \fB\-lineanchor\fR +. Changes the behavior of .QW ^ and @@ -108,26 +113,27 @@ 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). -.TP 10 +.TP \fB\-nocase\fR +. Upper-case characters in \fIstring\fR will be converted to lower-case before matching against \fIexp\fR; however, substitutions specified by \fIsubSpec\fR use the original unconverted form of \fIstring\fR. -.TP 10 +.TP \fB\-start\fR \fIindex\fR +. Specifies a character index offset into the string to start matching the regular expression at. -.VS 8.5 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, .QW ^ will not match the beginning of the line, and \eA will still match the start of the string at \fIindex\fR. \fIindex\fR will be constrained to the bounds of the input string. -.TP 10 +.TP \fB\-\|\-\fR +. 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 @@ -140,24 +146,29 @@ of regular expressions. .PP Replace (in the string in variable \fIstring\fR) every instance of \fBfoo\fR which is a word by itself with \fBbar\fR: +.PP .CS \fBregsub\fR -all {\emfoo\eM} $string bar string .CE +.PP or (using the .QW "basic regular expression" syntax): +.PP .CS \fBregsub\fR -all {(?b)\e<foo\e>} $string bar string .CE .PP Insert double-quotes around the first instance of the word \fBinteresting\fR, however it is capitalized. +.PP .CS \fBregsub\fR -nocase {\eyinteresting\ey} $string {"&"} string .CE .PP Convert all non-ASCII and Tcl-significant characters into \eu escape sequences by using \fBregsub\fR and \fBsubst\fR in combination: +.PP .CS # This RE is just a character class for almost everything "bad" set RE {[][{};#\e\e\e$ \er\et\eu0080-\euffff]} @@ -173,9 +184,9 @@ set quoted [subst [string map {\en {\e\eu000a}} \e [\fBregsub\fR -all $RE $string $substitution]]] .CE .SH "SEE ALSO" -regexp(n), re_syntax(n), subst(n), -.VS 8.5 -string(n) -.VE +regexp(n), re_syntax(n), subst(n), string(n) .SH KEYWORDS -match, pattern, quoting, regular expression, substitute +match, pattern, quoting, regular expression, substitution +'\" Local Variables: +'\" mode: nroff +'\" End: |