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Regexp::Common::numberUser)Contributed Perl DocumenRegexp::Common::number(3pm)

NAME
       Regexp::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}{-sign}
       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.

       If "-sign => P" is used, it's a pattern the leading sign has to match.
       This defaults to "[-+]?", which means the number is optionally preceded
       by a minus or a plus. If you want to match unsigned integers, use
       $RE{num}{int}{-sign => ''}.

       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
       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]/".

       If "-sign=P" is specified, the pattern P is used to match the leading
       sign (and the sign of the exponent). This defaults to "[-+]?", means
       means that an optional plus or minus sign can be used.

       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
       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":

       $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
       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.

   $RE{num}{roman}
       Returns a pattern that matches an integer written in Roman numbers.
       Case doesn't matter. There is no unique way of writing Roman numerals,
       but we will not match anything. We require the Roman numerals to list
       the symbols in order (largest first). The symbols for thousand ("M"),
       hundred ("C"), ten ("X"), and one ("I") can not be repeated more than
       four times. The symbols for five hundred ("D"), fifty ("L"), and five
       ("V") may not appear more than once. A sequence of four repeated
       characters may also be written as a subtraction: by using the repeated
       character just once, and have it followed by the symbol which is 5 or
       10 as large. So, four can be written as "IIII", or as "IV", and nine
       may be written as "VIIII" or "IX". This corresponds to most modern uses
       of Roman numerals.

       The largest number which will be matched is 4999, or
       "MMMMDCCCCLXXXXVIIII", or "MMMMCMXCIX".

       Under "-keep", the number will be captured in $1.

SEE ALSO
       Regexp::Common for a general description of how to use this interface.

AUTHOR
       Damian Conway (damian AT conway.org)

MAINTENANCE
       This package is maintained by Abigail (regexp-common AT abigail.be).

BUGS AND IRRITATIONS
       Bound to be plenty.

       For a start, there are many common regexes missing.  Send them in to
       regexp-common AT abigail.be.

LICENSE and COPYRIGHT
       This software is Copyright (c) 2001 - 2017, Damian Conway and Abigail.

       This module is free software, and maybe used under any of the following
       licenses:

        1) The Perl Artistic License.     See the file COPYRIGHT.AL.
        2) The Perl Artistic License 2.0. See the file COPYRIGHT.AL2.
        3) The BSD License.               See the file COPYRIGHT.BSD.
        4) The MIT License.               See the file COPYRIGHT.MIT.

perl v5.24.1                      2017-06-17       Regexp::Common::number(3pm)