perform substitutions based on regular expression pattern matching
regsub [switches] exp string subSpec varName
This command matches the regular expression exp
against string, and copies string to
the variable whose name is given by varName. The
command returns 1 if there is a match and 0 if there
isn't. If there is a match, then while copying
string to varName, the portion of
string that matches exp is replaced
with subSpec. If subSpec contains a
``&'' or ``\0'', then it is replaced in the
substitution with the portion of string that
matches exp. If subSpec contains a
``\n'', where n is a digit
between 1 and 9, then it is replaced in the substitution
with the portion of string that matches the
nth parenthesized subexpression of
exp. Additional backslashes may be used in
subSpec to prevent special interpretation of
``&'' or ``\0'' or ``\n'' or
backslash. The use of backslashes in subSpec
tends to interact badly with the Tcl parser's use of
backslashes, so it is generally safest to enclose
subSpec in braces if it includes backslashes.
If the initial arguments to regexp start with
``-'' then they are treated as switches.
The following switches are currently supported:
See the manual entry for
for details on the interpretation of regular expressions.
All ranges in string that match exp are
found and substitution is performed for each of these
ranges. Without this switch only the first matching range
is found and substituted. If -all is specified,
then ``&'' and ``\n'' sequences are
handled for each substitution using the information from
the corresponding match.
Upper-case characters in string are converted to
lowercase before matching against exp; however,
substitutions specified by subSpec use the
original unconverted form of string.
Marks the end of switches. The argument
following this one is treated as exp even if it
starts with a ``-''.
25 April 2004
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 25 April 2004