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.\" ========================================================================
.\"
.IX Title "Alien::Build::Version::Basic 3"
.TH Alien::Build::Version::Basic 3 "2024-10-29" "perl v5.26.3" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
Alien::Build::Version::Basic \- Very basic version object for Alien::Build
.SH "VERSION"
.IX Header "VERSION"
version 2.84
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\s-1OO\s0 interface:
.PP
.Vb 1
\& use Alien::Build::Version::Basic;
\& 
\& my $version = Alien::Build::Version::Basic\->new(\*(Aq1.2.3\*(Aq);
\& if($version > \*(Aq1.2.2\*(Aq)  # true
\& {
\&   ...
\& }
.Ve
.PP
Function interface:
.PP
.Vb 1
\& use Alien::Build::Version::Basic qw( version );
\& 
\& if(version(\*(Aq1.2.3\*(Aq) > version(\*(Aq1.2.2\*(Aq)) # true
\& {
\&   ...
\& }
\& 
\& my @sorted = sort map { version($_) } qw( 2.1 1.2.3 1.2.2 );
\& # will come out in the order 1.2.2, 1.2.3, 2.1
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This module provides a very basic class for comparing versions.
This is already a crowded space on \s-1CPAN.\s0  Parts of Alien::Build
already use Sort::Versions, which is fine for sorting versions.
Sometimes you need to compare to see if versions match exact \fIvalues\fR,
and the best candidates (such as Sort::Versions on \s-1CPAN\s0 compare
\&\f(CW1.2.3.0\fR and \f(CW1.2.3\fR as being different.  This class compares
those two as the same.
.PP
This class is also quite limited, in that it only works with version
schemes using a doted version numbers or real numbers with a fixed
number of digits.  Versions with: dashes, letters, hex digits, or
anything else are not supported.
.PP
This class overloads both \f(CW\*(C`<=>\*(C'\fR and \f(CW\*(C`cmp\*(C'\fR to compare the version in
the way that you would expect for version numbers.  This way you can
compare versions like numbers, or sort them using sort.
.PP
.Vb 4
\& if(version($v1) > version($v2))
\& {
\&   ...
\& }
\& 
\& my @sorted = sort map { version($_) } @unsorted;
.Ve
.PP
it also overloads \f(CW""\fR to stringify as whatever string value you
passed to the constructor.
.SH "CONSTRUCTOR"
.IX Header "CONSTRUCTOR"
.SS "new"
.IX Subsection "new"
.Vb 1
\& my $version = Alien::Build::Version::Basic\->new($value);
.Ve
.PP
This is the long form of the constructor, if you don't want to import
anything into your namespace.
.SS "version"
.IX Subsection "version"
.Vb 1
\& my $version = version($value);
.Ve
.PP
This is the short form of the constructor, if you are sane.  It is
\&\s-1NOT\s0 exported by default so you will have to explicitly import it.
.SH "METHODS"
.IX Header "METHODS"
.SS "as_string"
.IX Subsection "as_string"
.Vb 2
\& my $string = $version\->as_string;
\& my $string = "$version";
.Ve
.PP
Returns the string representation of the version object.
.SS "cmp"
.IX Subsection "cmp"
.Vb 3
\& my $bool = $version\->cmp($other);
\& my $bool = $version <=> $other;
\& my $bool = $version cmp $other;
.Ve
.PP
Returns \f(CW\*(C`\-1\*(C'\fR, \f(CW0\fR or \f(CW1\fR just like the regular \f(CW\*(C`<=>\*(C'\fR and \f(CW\*(C`cmp\*(C'\fR
operators.  Although \f(CW$version\fR must be a version object, \f(CW$other\fR may
be either a version object, or a string that could be used to create a
valid version object.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
.IP "Sort::Versions" 4
.IX Item "Sort::Versions"
Good, especially if you have to support rpm style versions (like \f(CW\*(C`1.2.3\-2\-b\*(C'\fR)
or don't care if trailing zeros (\f(CW1.2.3\fR vs \f(CW1.2.3.0\fR) are treated as
different values.
.IP "version" 4
.IX Item "version"
Problematic for historical reasons.
.SH "AUTHOR"
.IX Header "AUTHOR"
Author: Graham Ollis <plicease@cpan.org>
.PP
Contributors:
.PP
Diab Jerius (\s-1DJERIUS\s0)
.PP
Roy Storey (\s-1KIWIROY\s0)
.PP
Ilya Pavlov
.PP
David Mertens (run4flat)
.PP
Mark Nunberg (mordy, mnunberg)
.PP
Christian Walde (Mithaldu)
.PP
Brian Wightman (MidLifeXis)
.PP
Zaki Mughal (zmughal)
.PP
mohawk (mohawk2, \s-1ETJ\s0)
.PP
Vikas N Kumar (vikasnkumar)
.PP
Flavio Poletti (polettix)
.PP
Salvador Fandiño (salva)
.PP
Gianni Ceccarelli (dakkar)
.PP
Pavel Shaydo (zwon, trinitum)
.PP
Kang-min Liu (劉康民, gugod)
.PP
Nicholas Shipp (nshp)
.PP
Juan Julián Merelo Guervós (\s-1JJ\s0)
.PP
Joel Berger (\s-1JBERGER\s0)
.PP
Petr Písař (ppisar)
.PP
Lance Wicks (\s-1LANCEW\s0)
.PP
Ahmad Fatoum (a3f, \s-1ATHREEF\s0)
.PP
José Joaquín Atria (\s-1JJATRIA\s0)
.PP
Duke Leto (\s-1LETO\s0)
.PP
Shoichi Kaji (\s-1SKAJI\s0)
.PP
Shawn Laffan (\s-1SLAFFAN\s0)
.PP
Paul Evans (leonerd, \s-1PEVANS\s0)
.PP
Håkon Hægland (hakonhagland, \s-1HAKONH\s0)
.PP
nick nauwelaerts (\s-1INPHOBIA\s0)
.PP
Florian Weimer
.SH "COPYRIGHT AND LICENSE"
.IX Header "COPYRIGHT AND LICENSE"
This software is copyright (c) 2011\-2022 by Graham Ollis.
.PP
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.