These functions are defined in rgx.c using a POSIX or GNU regex library. If your computer does not support regex, a package is available via ftp from ftp.gnu.org:/pub/gnu/regex-0.12.tar.gz. For a description of regular expressions, See syntax in "regex" regular expression matching library.
Compile a regular expression. Return a compiled regular
expression, or an integer error code suitable as an argument to
regcomp is a string of option letters used to
control the compilation of the regular expression. The letters may
newlines won’t be matched by
. or hat lists; (
only when compiled with _GNU_SOURCE:
allows dot to match a null character.
enable GNU fastmaps.
Returns a string describing the integer errno returned when
#f or a vector of integers. These integers are in
doublets. The first of each doublet is the index of string of
the start of the matching expression or sub-expression (delimited by
parentheses in the pattern). The last of each doublet is index of
string of the end of that expression.
#f is returned if
the string does not match.
#t if the pattern such that regexp = (regcomp
pattern) matches string as a POSIX extended regular
Regsearch searches for the pattern within the string.
Regmatch anchors the pattern and begins matching it against
Regsearch returns the character position where re starts,
#f if not found.
Regmatch returns the number of characters matched,
regmatchv return the match vector is
returned if re is found,
may be either:
The string to be operated upon.
The character position at which to begin the search or match. If absent, the default is zero.
Compiled _GNU_SOURCE and using GNU libregex only
When searching, if start is negative, the absolute value of start will be used as the start location and reverse searching will be performed.
The search is allowed to examine only the first len characters of string. If absent, the entire string may be examined.
String-split splits a string into substrings that are separated
by re, returning a vector of substrings.
String-splitv returns a vector of string positions that indicate
where the substrings are located.
Returns the edited string.
Is a string used to replace occurances of re. Backquoted integers
in the range of 1-9 may be used to insert subexpressions in re, as
The number of substitutions for
string-edit to perform. If
#t, all occurances of re will be replaced. The default is
to perform one substitution.