check-regexp(1) [debian man page]

CHECK-REGEXP(1) 						   User Commands						   CHECK-REGEXP(1)

NAME

       check-regexp -  test regular expressions from the command line

SYNOPSIS

       check-regexp 'regular expression' 'string1' 'string2' ...

DESCRIPTION

       check-regexp (GNU Source-highlight)

       You simply pass as the first command line argument the regular expression and then the strings you want to try to match.
       It is crucial, in order to avoid shell substitutions, to enclose both the expression and the strings in single quotes.

       The program then prints some information about the possibly successful matching.
       In the output the what[0] part represents the whole match, and the what[i] part represents the i-th marked subexpression that matched.

       The program also prints possible prefix and suffix.

OPTIONS

       This program follows the usual GNU command line syntax, with long options starting with two dashes (`-').  A summary of options is included
       below.

       -h, --help
	      Print help and exit

       -V, --version
	      Print version and exit

AUTHOR

       check-regexp was written by Lorenzo Bettini <www.lorenzobettini.it>.  This man page was written by Cesare Tirabassi <norsetto@ubuntu.com>.

check-regexp 2.9						     June 2008							   CHECK-REGEXP(1)

REGEXP(6)							   Games Manual 							 REGEXP(6)

NAME

       regexp - regular expression notation

DESCRIPTION

       A  regular  expression  specifies  a  set  of  strings of characters.  A member of this set of strings is said to be matched by the regular
       expression.  In many applications a delimiter character, commonly bounds a regular expression.  In the following specification for  regular
       expressions the word `character' means any character (rune) but newline.

       The syntax for a regular expression e0 is

	      e3:  literal | charclass | '.' | '^' | '$' | '(' e0 ')'

	      e2:  e3
		|  e2 REP

	      REP: '*' | '+' | '?'

	      e1:  e2
		|  e1 e2

	      e0:  e1
		|  e0 '|' e1

       A literal is any non-metacharacter, or a metacharacter (one of .*+?[]()|^$), or the delimiter preceded by

       A  charclass  is  a  nonempty string s bracketed [s] (or [^s]); it matches any character in (or not in) s.  A negated character class never
       matches newline.  A substring a-b, with a and b in ascending order, stands for the inclusive range of characters between a and  b.   In	s,
       the  metacharacters  an initial and the regular expression delimiter must be preceded by a other metacharacters have no special meaning and
       may appear unescaped.

       A matches any character.

       A matches the beginning of a line; matches the end of the line.

       The REP operators match zero or more (*), one or more (+), zero or one (?), instances respectively of the preceding regular expression e2.

       A concatenated regular expression, e1e2, matches a match to e1 followed by a match to e2.

       An alternative regular expression, e0|e1, matches either a match to e0 or a match to e1.

       A match to any part of a regular expression extends as far as possible without preventing a match to the remainder of the  regular  expres-
       sion.

SEE ALSO

       awk(1), ed(1), sam(1), sed(1), regexp(2)

																	 REGEXP(6)