Provided by: libsemver-perl_0.7.0-1_all bug


       SemVer - Use semantic version numbers


         use SemVer; our $VERSION = SemVer->new('1.2.0-b1');


       This module subclasses version to create semantic versions, as defined by the Semantic
       Versioning 2.0.0 Specification <>.  The three salient
       points of the specification, for the purposes of version formatting, are:

       1.  A normal version number MUST take the form X.Y.Z where X, Y, and Z are non-negative
           integers, and MUST NOT contain leading zeroes. X is the major version, Y is the minor
           version, and Z is the patch version. Each element MUST increase numerically.  For
           instance: "1.9.0 -> 1.10.0 -> 1.11.0".

       2.  A pre-release version MAY be denoted by appending a hyphen and a series of dot
           separated identifiers immediately following the patch version. Identifiers MUST
           comprise only ASCII alphanumerics and hyphen "[0-9A-Za-z-]". Identifiers MUST NOT be
           empty. Numeric identifiers MUST NOT include leading zeroes. Pre-release versions have
           a lower precedence than the associated normal version. A pre-release version indicates
           that the version is unstable and might not satisfy the intended compatibility
           requirements as denoted by its associated normal version: "1.0.0-alpha, 1.0.0-alpha.1,
           1.0.0-0.3.7, 1.0.0-x.7.z.92"

       3.  Build metadata MAY be denoted by appending a plus sign and a series of dot separated
           identifiers immediately following the patch or pre-release version. Identifiers MUST
           comprise only ASCII alphanumerics and hyphen "[0-9A-Za-z-]". Identifiers MUST NOT be
           empty. Build metadata SHOULD be ignored when determining version precedence. Thus two
           versions that differ only in the build metadata, have the same precedence.  Examples:
           "1.0.0-alpha+001, 1.0.0+20130313144700, 1.0.0-beta+exp.sha.5114f85".

       For strict parsing of semantic version numbers, use the "new()" constructor.  If you need
       something more flexible, use "declare()". And if you need something more comparable with
       what version expects, try "parse()".  Compare how these constructors deal with various
       version strings (with values shown as returned by "normal()":

           Argument  | new      | declare     | parse
         '1.0.0'     | 1.0.0    | 1.0.0       | 1.0.0
         '5.5.2-b1'  | 5.5.2-b1 | 5.5.2-b1    | 5.5.2-b1
         '1.05.0'    | <error>  | 1.5.0       | 1.5.0
         '1.0'       | <error>  | 1.0.0       | 1.0.0
         '  012.2.2' | <error>  | 12.2.2      | 12.2.2
         '1.1'       | <error>  | 1.1.0       | 1.100.0
          1.1        | <error>  | 1.1.0       | 1.100.0
         '1.1.0b1'   | <error>  | 1.1.0-b1    | 1.1.0-b1
         '1.1-b1'    | <error>  | 1.1.0-b1    | 1.100.0-b1
         '1.2.b1'    | <error>  | 1.2.0-b1    | 1.2.0-b1
         '9.0-beta4' | <error>  | 9.0.0-beta4 | 9.0.0-beta4
         '9'         | <error>  | 9.0.0       | 9.0.0
         '1-b'       | <error>  | 1.0.0-b     | 1.0.0-b
          0          | <error>  | 0.0.0       | 0.0.0
         '0-rc1'     | <error>  | 0.0.0-rc1   | 0.0.0-rc1
         '1.02_30'   | <error>  | 1.23.0      | 1.23.0
          1.02_30    | <error>  | 1.23.0      | 1.23.0

       Note that, unlike in version, the "declare" and "parse" methods ignore underscores. That
       is, version strings with underscores are treated as decimal numbers. Hence, the last two
       examples yield exactly the same semantic versions.

       As with version objects, the comparison and stringification operators are all overloaded,
       so that you can compare semantic versions. You can also compare semantic versions with
       version objects (but not the other way around, alas). Boolean operators are also
       overloaded, such that all semantic version objects except for those consisting only of
       zeros are considered true.



         my $semver = SemVer->new('1.2.2');

       Performs a validating parse of the version string and returns a new semantic version
       object. If the version string does not adhere to the semantic version specification an
       exception will be thrown. See "declare" and "parse" for more forgiving constructors.


         my $semver = SemVer->declare('1.2'); # 1.2.0

       This parser strips out any underscores from the version string and passes it to to
       "version"'s "declare" constructor, which always creates dotted-integer version objects.
       This is the most flexible way to declare versions. Consider using it to normalize version


         my $semver = SemVer->parse('1.2'); # 1.200.0

       This parser dispatches to "version"'s "parse" constructor, which tries to be more flexible
       in how it converts simple decimal strings and numbers. Not really recommended, since it's
       treatment of decimals is quite different from the dotted-integer format of semantic
       version strings, and thus can lead to inconsistencies. Included only for proper
       compatibility with version.

   Instance Methods

         SemVer->declare('v1.2')->normal;       # 1.2.0
         SemVer->parse('1.2')->normal;          # 1.200.0
         SemVer->declare('1.02.0-b1')->normal;  # 1.2.0-b1
         SemVer->parse('1.02_30')->normal       # 1.230.0
         SemVer->parse(1.02_30)->normal         # 1.23.0

       Returns a normalized representation of the version. This string will always be a strictly-
       valid dotted-integer semantic version string suitable for passing to "new()". Unlike
       version's "normal" method, there will be no leading "v".


         SemVer->declare('v1.2')->stringify;    # v1.2
         SemVer->parse('1.200')->stringify;     # v1.200
         SemVer->declare('1.2-r1')->stringify;  # v1.2-r1
         SemVer->parse(1.02_30)->stringify;     # v1.0230
         SemVer->parse(1.02_30)->stringify;     # v1.023

       Returns a string that is as close to the original representation as possible.  If the
       original representation was a numeric literal, it will be returned the way perl would
       normally represent it in a string. This method is used whenever a version object is
       interpolated into a string.


       Throws an exception. Semantic versions cannot be numified. Just don't go there.


         my $is_alpha = $semver->is_alpha;

       Returns true if an ASCII string is appended to the end of the version string.  This also
       means that the version number is a "special version", in the semantic versioning
       specification meaning of the phrase.


       Compares the semantic version object to another version object or string and returns 0 if
       they're the same, -1 if the invocant is smaller than the argument, and 1 if the invocant
       is greater than the argument.

       Mostly you don't need to worry about this: Just use the comparison operators instead. They
       will use this method:

         if ($semver < $another_semver) {
             die "Need $another_semver or higher";

       Note that in addition to comparing other semantic version objects, you can also compare
       regular version objects:

         if ($semver < $version) {
             die "Need $version or higher";

       You can also pass in a version string. It will be turned into a semantic version object
       using "declare". So if you're using integer versions, you may or may not get what you

         my $semver  = version::Semver->new('1.2.0');
         my $version = '1.2';
         my $bool    = $semver == $version; # true

       If that's not what you want, pass the string to "parse" first:

         my $semver  = version::Semver->new('1.2.0');
         my $version = version::Semver->parse('1.2'); # 1.200.0
         my $bool    = $semver == $version; # false

See Also

       ·   Semantic Versioning Specification <>.

       ·   version

       ·   version::AlphaBeta


       This module is managed in an open GitHub repository <>.
       Feel free to fork and contribute, or to clone <git://> and
       send patches!

       Found a bug? Please post <> or email <mailto:bug-> a report!


       Many thanks to version author John Peacock for his suggestions and debugging help.


       ·   David E. Wheeler <>

       ·   Johannes Kilian <>

Copyright and License

       Copyright (c) 2010-2018 David E. Wheeler. Some Rights Reserved.

       This module is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.