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PERLANCAR / Scalar-Util-Numeric-PP-0.04 / lib / Scalar / Util / Numeric / PP.pm 

            

              
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package Scalar::Util::Numeric::PP;
our $DATE = '2016-01-22'; # DATE
our $VERSION = '0.04'; # VERSION
use 5.010001;
use strict;
use warnings;
require Exporter;
our @ISA       = qw(Exporter);
our @EXPORT_OK = qw(
                       isint
                       isnum
                       isnan
                       isinf
                       isneg
                       isfloat
               );
sub isint {
    local $_ = shift;
    return 0 unless defined;
    return 1 if /\A\s*[+-]?(?:0|[1-9][0-9]*)\s*\z/s;
    0;
}
sub isnan($) {
    local $_ = shift;
    return 0 unless defined;
    return 1 if /\A\s*[+-]?nan\s*\z/is;
    0;
}
sub isinf($) {
    local $_ = shift;
    return 0 unless defined;
    return 1 if /\A\s*[+-]?inf(?:inity)?\s*\z/is;
    0;
}
sub isneg($) {
    local $_ = shift;
    return 0 unless defined;
    return 1 if /\A\s*-/;
    0;
}
sub isnum($) {
    local $_ = shift;
    return 0 unless defined;
    return 1 if isint($_);
    return 1 if isfloat($_);
    0;
}
sub isfloat($) {
    local $_ = shift;
    return 0 unless defined;
    return 1 if /\A\s*[+-]?
                 (?: (?:0|[1-9][0-9]*)(\.[0-9]+)? | (\.[0-9]+) )
                 ([eE][+-]?[0-9]+)?\s*\z/sx && $1 || $2 || $3;
    return 1 if isnan($_) || isinf($_);
    0;
}
1;
# ABSTRACT: Pure-perl drop-in replacement/approximation of Scalar::Util::Numeric
__END__
=pod
=encoding UTF-8
=head1 NAME
Scalar::Util::Numeric::PP - Pure-perl drop-in replacement/approximation of Scalar::Util::Numeric
=head1 VERSION
This document describes version 0.04 of Scalar::Util::Numeric::PP (from Perl distribution Scalar-Util-Numeric-PP), released on 2016-01-22.
=head1 SYNOPSIS
=head1 DESCRIPTION
This module is written mainly for the convenience of L<Data::Sah>, as a drop-in
pure-perl replacement for the XS module L<Scalar::Util::Numeric>, in the case
when Data::Sah needs to generate code that uses PP modules instead of XS ones.
Not all functions from Scalar::Util::Numeric have been provided.
=head1 FUNCTIONS
=head2 isint
=head2 isfloat
=head2 isnum
=head2 isneg
=head2 isinf
=head2 isnan
=head1 HOMEPAGE
Please visit the project's homepage at L<https://metacpan.org/release/Scalar-Util-Numeric-PP>.
=head1 SOURCE
Source repository is at L<https://github.com/perlancar/perl-Scalar-Util-Numeric-PP>.
=head1 BUGS
Please report any bugs or feature requests on the bugtracker website L<https://rt.cpan.org/Public/Dist/Display.html?Name=Scalar-Util-Numeric-PP>
When submitting a bug or request, please include a test-file or a
patch to an existing test-file that illustrates the bug or desired
feature.
=head1 SEE ALSO
L<Data::Sah>
L<Scalar::Util::Numeric>
=head1 AUTHOR
perlancar <perlancar@cpan.org>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2016 by perlancar@cpan.org.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut