Regexp::Common::numberUser Contributed Perl DocumentaRegexp::Common::number(3)NAMERegexp::Common::number-- provide regexes for numbers
SYNOPSIS
use Regexp::Common qw /number/;
while (<>) {
/^$RE{num}{int}$/ and print "Integer\n";
/^$RE{num}{real}$/ and print "Real\n";
/^$RE{num}{real}{-base => 16}$/ and print "Hexadecimal real\n";
}
DESCRIPTION
Please consult the manual of Regexp::Common for a general description
of the works of this interface.
Do not use this module directly, but load it via Regexp::Common.
$RE{num}{int}{-base}{-sep}{-group}{-places}
Returns a pattern that matches an integer.
If "-base => B" is specified, the integer is in base B, with "2 <= B <=
36". For bases larger than 10, upper case letters are used. The default
base is 10.
If "-sep => P" is specified, the pattern P is required as a grouping
marker within the number. If this option is not given, no grouping
marker is used.
If "-group => N" is specified, digits between grouping markers must be
grouped in sequences of exactly N digits. The default value of N is 3.
If "-group => N,M" is specified, digits between grouping markers must
be grouped in sequences of at least N digits, and at most M digits.
This option is ignored unless the "-sep" option is used.
If "-places => N" is specified, the integer recognized must be exactly
N digits wide. If "-places => N,M" is specified, the integer must be at
least N wide, and at most M characters. There is no default, which
means that integers are unlimited in size. This option is ignored if
the "-sep" option is used.
For example:
$RE{num}{int} # match 1234567
$RE{num}{int}{-sep=>','} # match 1,234,567
$RE{num}{int}{-sep=>',?'} # match 1234567 or 1,234,567
$RE{num}{int}{-sep=>'.'}{-group=>4} # match 1.2345.6789
Under "-keep" (see Regexp::Common):
$1 captures the entire number
$2 captures the optional sign of the number
$3 captures the complete set of digits
$RE{num}{real}{-base}{-radix}{-places}{-sep}{-group}{-expon}
Returns a pattern that matches a floating-point number.
If "-base=N" is specified, the number is assumed to be in that base
(with A..Z representing the digits for 11..36). By default, the base is
10.
If "-radix=P" is specified, the pattern P is used as the radix point
for the number (i.e. the "decimal point" in base 10). The default is
"qr/[.]/".
If "-places=N" is specified, the number is assumed to have exactly N
places after the radix point. If "-places=M,N" is specified, the num-
ber is assumed to have between M and N places after the radix point.
By default, the number of places is unrestricted.
If "-sep=P" specified, the pattern P is required as a grouping marker
within the pre-radix section of the number. By default, no separator is
allowed.
If "-group=N" is specified, digits between grouping separators must be
grouped in sequences of exactly N characters. The default value of N is
3.
If "-expon=P" is specified, the pattern P is used as the exponential
marker. The default value of P is "qr/[Ee]/".
For example:
$RE{num}{real} # matches 123.456 or -0.1234567
$RE{num}{real}{-places=>2} # matches 123.45 or -0.12
$RE{num}{real}{-places=>'0,3'} # matches 123.456 or 0 or 9.8
$RE{num}{real}{-sep=>'[,.]?'} # matches 123,456 or 123.456
$RE{num}{real}{-base=>3'} # matches 121.102
Under "-keep":
$1 captures the entire match
$2 captures the optional sign of the number
$3 captures the complete mantissa
$4 captures the whole number portion of the mantissa
$5 captures the radix point
$6 captures the fractional portion of the mantissa
$7 captures the optional exponent marker
$8 captures the entire exponent value
$9 captures the optional sign of the exponent
$10 captures the digits of the exponent
$RE{num}{dec}{-radix}{-places}{-sep}{-group}{-expon}
A synonym for $RE{num}{real}{-base=>10}{...}
$RE{num}{oct}{-radix}{-places}{-sep}{-group}{-expon}
A synonym for $RE{num}{real}{-base=>8}{...}
$RE{num}{bin}{-radix}{-places}{-sep}{-group}{-expon}
A synonym for $RE{num}{real}{-base=>2}{...}
$RE{num}{hex}{-radix}{-places}{-sep}{-group}{-expon}
A synonym for $RE{num}{real}{-base=>16}{...}
$RE{num}{decimal}{-base}{-radix}{-places}{-sep}{-group}
The same as $RE{num}{real}, except that an exponent isn't allowed.
Hence, this returns a pattern matching decimal numbers.
If "-base=N" is specified, the number is assumed to be in that base
(with A..Z representing the digits for 11..36). By default, the base is
10.
If "-radix=P" is specified, the pattern P is used as the radix point
for the number (i.e. the "decimal point" in base 10). The default is
"qr/[.]/".
If "-places=N" is specified, the number is assumed to have exactly N
places after the radix point. If "-places=M,N" is specified, the num-
ber is assumed to have between M and N places after the radix point.
By default, the number of places is unrestricted.
If "-sep=P" specified, the pattern P is required as a grouping marker
within the pre-radix section of the number. By default, no separator is
allowed.
If "-group=N" is specified, digits between grouping separators must be
grouped in sequences of exactly N characters. The default value of N is
3.
For example:
$RE{num}{decimal} # matches 123.456 or -0.1234567
$RE{num}{decimal}{-places=>2} # matches 123.45 or -0.12
$RE{num}{decimal}{-places=>'0,3'} # matches 123.456 or 0 or 9.8
$RE{num}{decimal}{-sep=>'[,.]?'} # matches 123,456 or 123.456
$RE{num}{decimal}{-base=>3'} # matches 121.102
Under "-keep":
$1 captures the entire match
$2 captures the optional sign of the number
$3 captures the complete mantissa
$4 captures the whole number portion of the mantissa
$5 captures the radix point
$6 captures the fractional portion of the mantissa
$RE{num}{square}
Returns a pattern that matches a (decimal) square. Because Perl's
arithmetic is lossy when using integers over about 53 bits, this pat-
tern only recognizes numbers less than 9000000000000000, if one uses a
Perl that is configured to use 64 bit integers. Otherwise, the limit is
2147483647. These restrictions were introduced in versions 2.116 and
2.117 of Regexp::Common. Regardless whether "-keep" was set, the
matched number will be returned in $1.
This pattern is available for version 5.008 and up.
$RE{num}{roman}
Returns a pattern that matches an integer written in Roman numbers.
Case doesn't matter. Only the more modern style, that is, no more than
three repetitions of a letter, is recognized. The largest number
matched is MMMCMXCIX, or 3999. Larger numbers cannot be expressed using
ASCII characters. A future version will be able to deal with the Uni-
code symbols to match larger Roman numbers.
Under "-keep", the number will be captured in $1.
HISTORY
$Log: number.pm,v $
Revision 2.108 2005/03/16 00:25:58 abigail
Added -base, -places for {num} {int}. Changed -group
Revision 2.107 2004/12/28 23:45:51 abigail
Perl 5.6.2 parses qq lib/Regexp/Common/number.pm{sep}[0-9]! incorrectly
Revision 2.106 2004/12/28 23:27:58 abigail
Replaced C<\d> with [0-9] (Unicode reasons)
Revision 2.105 2004/07/01 10:11:27 abigail
Fixed problems with 32bit integer Perls
Revision 2.104 2004/06/30 09:14:54 abigail
Restricted recognition of square numbers to numbers less than
9000000000000000 to avoid round-off errors.
Revision 2.103 2003/03/12 22:24:25 abigail
Decimal numbers
Revision 2.102 2003/02/10 21:34:24 abigail
Added VERSION
Revision 2.101 2003/02/01 22:55:31 abigail
Changed Copyright years
Revision 2.100 2003/01/21 23:19:40 abigail
The whole world understands RCS/CVS version numbers, that 1.9 is an
older version than 1.10. Except CPAN. Curse the idiot(s) who think
that version numbers are floats (in which universe do floats have
more than one decimal dot?).
Everything is bumped to version 2.100 because CPAN couldn't deal
with the fact one file had version 1.10.
Revision 1.6 2002/12/27 23:33:15 abigail
Roman numbers.
Revision 1.5 2002/08/23 13:09:13 abigail
Cosmetic POD changes.
Revision 1.4 2002/08/23 12:51:26 abigail
+ Several occurances of 'numbers' changed to 'number'.
+ Fixed bugs in documentation.
+ Made example use anchors to make it more clear.
(All due to Christopher Baker)
Revision 1.3 2002/08/05 12:16:59 abigail
Fixed 'Regex::' and 'Rexexp::' typos to 'Regexp::'
(Found by Mike Castle).
Revision 1.2 2002/07/30 16:37:59 abigail
Removed outcommented code.
Revision 1.1 2002/07/28 21:41:07 abigail
Split off from Regexp::Common.
SEE ALSO
Regexp::Common for a general description of how to use this interface.
AUTHOR
Damian Conway (damian@conway.org)
MAINTAINANCE
This package is maintained by Abigail (regexp-common@abigail.nl).
BUGS AND IRRITATIONS
Bound to be plenty.
For a start, there are many common regexes missing. Send them in to
regexp-common@abigail.nl.
COPYRIGHT
Copyright (c) 2001 - 2003, Damian Conway. All Rights Reserved.
This module is free software. It may be used, redistributed
and/or modified under the terms of the Perl Artistic License
(see http://www.perl.com/perl/misc/Artistic.html)
perl v5.8.8 2003-03-23 Regexp::Common::number(3)
