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Regexp::Common::number -- provide regexes for numbers |
$RE{num}{int}{-base}{-sep}{-group}{-places}$RE{num}{real}{-base}{-radix}{-places}{-sep}{-group}{-expon}$RE{num}{dec}{-radix}{-places}{-sep}{-group}{-expon}$RE{num}{oct}{-radix}{-places}{-sep}{-group}{-expon}$RE{num}{bin}{-radix}{-places}{-sep}{-group}{-expon}$RE{num}{hex}{-radix}{-places}{-sep}{-group}{-expon}$RE{num}{decimal}{-base}{-radix}{-places}{-sep}{-group}$RE{num}{square}$RE{num}{roman}
Regexp::Common::number -- provide regexes for numbers
use Regexp::Common qw /number/;
while (<>) {
/^$RE{num}{int}$/ and print "Integer\n";
/^$RE{num}{real}$/ and print "Real\n";
/^$RE{num}{real}{-base => 16}$/ and print "Hexadecimal real\n";
}
Please consult the manual of the Regexp::Common manpage 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 the Regexp::Common manpage):
$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 number 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:
$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 number 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:
$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 pattern
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 Unicode symbols to match larger Roman numbers.
Under -keep, the number will be captured in $1.
$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.
the Regexp::Common manpage for a general description of how to use this interface.
Damian Conway (damian@conway.org)
This package is maintained by Abigail (
Bound to be plenty.
For a start, there are many common regexes missing. Send them in to regexp-common@abigail.nl.
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)
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Regexp::Common::number -- provide regexes for numbers |