/
usr
/
local
/
share
/
man
/
man3
/
/usr/local/share/man/man3
mkdir
upload
Name
Size
Mode
Actions
App::Prove.3pm
10508
0444
edit
dl
rm
App::Prove::State.3pm
6005
0444
edit
dl
rm
App::Prove::State::Result.3pm
5619
0444
edit
dl
rm
App::Prove::State::Result::Test.3pm
5051
0444
edit
dl
rm
AppConfig.3pm
35289
0444
edit
dl
rm
AppConfig::Args.3pm
7992
0444
edit
dl
rm
AppConfig::CGI.3pm
6609
0444
edit
dl
rm
AppConfig::File.3pm
12614
0444
edit
dl
rm
AppConfig::Getopt.3pm
7444
0444
edit
dl
rm
AppConfig::State.3pm
24972
0444
edit
dl
rm
AppConfig::Sys.3pm
6695
0444
edit
dl
rm
Archive::Tar.3pm
44061
0444
edit
dl
rm
Archive::Tar::File.3pm
11083
0444
edit
dl
rm
Archive::Zip.3pm
69985
0444
edit
dl
rm
Archive::Zip::FAQ.3pm
18437
0444
edit
dl
rm
Archive::Zip::MemberRead.3pm
6734
0444
edit
dl
rm
Archive::Zip::Tree.3pm
2875
0444
edit
dl
rm
B::COW.3pm
5163
0444
edit
dl
rm
Canary::Stability.3pm
3727
0444
edit
dl
rm
CDB_File.3pm
14318
0444
edit
dl
rm
common::sense.3pm
0
0444
edit
dl
rm
Compress::Raw::Bzip2.3pm
13463
0444
edit
dl
rm
Compress::Raw::Zlib.3pm
42082
0444
edit
dl
rm
Compress::Zlib.3pm
38719
0444
edit
dl
rm
CPAN::Meta.3pm
15923
0444
edit
dl
rm
CPAN::Meta::Converter.3pm
6594
0444
edit
dl
rm
CPAN::Meta::Feature.3pm
4322
0444
edit
dl
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CPAN::Meta::History.3pm
7855
0444
edit
dl
rm
CPAN::Meta::History::Meta_1_0.3pm
9973
0444
edit
dl
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CPAN::Meta::History::Meta_1_1.3pm
12410
0444
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dl
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CPAN::Meta::History::Meta_1_2.3pm
22224
0444
edit
dl
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CPAN::Meta::History::Meta_1_3.3pm
23974
0444
edit
dl
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CPAN::Meta::History::Meta_1_4.3pm
24565
0444
edit
dl
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CPAN::Meta::Merge.3pm
5285
0444
edit
dl
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CPAN::Meta::Prereqs.3pm
7380
0444
edit
dl
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CPAN::Meta::Requirements.3pm
12308
0444
edit
dl
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CPAN::Meta::Spec.3pm
45592
0444
edit
dl
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CPAN::Meta::Validator.3pm
4215
0444
edit
dl
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CPAN::Meta::YAML.3pm
4230
0444
edit
dl
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Crypt::OpenSSL::Random.3pm
5634
0444
edit
dl
rm
Curses.3pm
37580
0444
edit
dl
rm
Curses::UI.3pm
15619
0444
edit
dl
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Curses::UI::Buttonbox.3pm
8908
0444
edit
dl
rm
Curses::UI::Calendar.3pm
8203
0444
edit
dl
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Curses::UI::Checkbox.3pm
6509
0444
edit
dl
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Curses::UI::Color.3pm
5903
0444
edit
dl
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Curses::UI::Common.3pm
6498
0444
edit
dl
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Curses::UI::Container.3pm
9041
0444
edit
dl
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Curses::UI::Dialog::Basic.3pm
5213
0444
edit
dl
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Curses::UI::Dialog::Calendar.3pm
4761
0444
edit
dl
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Curses::UI::Dialog::Dirbrowser.3pm
5369
0444
edit
dl
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Curses::UI::Dialog::Error.3pm
4307
0444
edit
dl
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Curses::UI::Dialog::Filebrowser.3pm
6889
0444
edit
dl
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Curses::UI::Dialog::Progress.3pm
5774
0444
edit
dl
rm
Curses::UI::Dialog::Question.3pm
5277
0444
edit
dl
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Curses::UI::Dialog::Status.3pm
4765
0444
edit
dl
rm
Curses::UI::Label.3pm
7333
0444
edit
dl
rm
Curses::UI::Listbox.3pm
11988
0444
edit
dl
rm
Curses::UI::Menubar.3pm
8110
0444
edit
dl
rm
Curses::UI::Notebook.3pm
9140
0444
edit
dl
rm
Curses::UI::PasswordEntry.3pm
3743
0444
edit
dl
rm
Curses::UI::Popupmenu.3pm
7431
0444
edit
dl
rm
Curses::UI::Progressbar.3pm
5891
0444
edit
dl
rm
Curses::UI::Radiobuttonbox.3pm
4069
0444
edit
dl
rm
Curses::UI::Searchable.3pm
6668
0444
edit
dl
rm
Curses::UI::TextEditor.3pm
14171
0444
edit
dl
rm
Curses::UI::TextEntry.3pm
3623
0444
edit
dl
rm
Curses::UI::TextViewer.3pm
3670
0444
edit
dl
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Curses::UI::Tutorial.3pm
8555
0444
edit
dl
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Curses::UI::Widget.3pm
25675
0444
edit
dl
rm
Curses::UI::Window.3pm
5084
0444
edit
dl
rm
Cwd.3pm
7183
0444
edit
dl
rm
Date::Format.3pm
7291
0444
edit
dl
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Date::Language.3pm
3809
0444
edit
dl
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Date::Language::Bulgarian.3pm
3675
0444
edit
dl
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Date::Language::Hungarian.3pm
3091
0444
edit
dl
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Date::Parse.3pm
5402
0444
edit
dl
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Digest::SHA.3pm
25759
0444
edit
dl
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Expect.3pm
60229
0444
edit
dl
rm
ExtUtils::CBuilder.3pm
11923
0444
edit
dl
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ExtUtils::CBuilder::Platform::Windows.3pm
3117
0444
edit
dl
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ExtUtils::Command.3pm
5942
0444
edit
dl
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ExtUtils::Command::MM.3pm
5723
0444
edit
dl
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ExtUtils::Liblist.3pm
12679
0444
edit
dl
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ExtUtils::MakeMaker.3pm
79357
0444
edit
dl
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ExtUtils::MakeMaker::Config.3pm
2587
0444
edit
dl
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ExtUtils::MakeMaker::FAQ.3pm
26829
0444
edit
dl
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ExtUtils::MakeMaker::Locale.3pm
11168
0444
edit
dl
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ExtUtils::MakeMaker::Tutorial.3pm
8389
0444
edit
dl
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ExtUtils::Manifest.3pm
11961
0444
edit
dl
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ExtUtils::Mkbootstrap.3pm
3459
0444
edit
dl
rm
ExtUtils::Mksymlists.3pm
6699
0444
edit
dl
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ExtUtils::MM.3pm
2829
0444
edit
dl
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ExtUtils::MM_AIX.3pm
3044
0444
edit
dl
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ExtUtils::MM_Any.3pm
31129
0444
edit
dl
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ExtUtils::MM_BeOS.3pm
2798
0444
edit
dl
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ExtUtils::MM_Cygwin.3pm
3569
0444
edit
dl
rm
ExtUtils::MM_Darwin.3pm
2688
0444
edit
dl
rm
ExtUtils::MM_DOS.3pm
3021
0444
edit
dl
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ExtUtils::MM_MacOS.3pm
2987
0444
edit
dl
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ExtUtils::MM_NW5.3pm
3200
0444
edit
dl
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ExtUtils::MM_OS2.3pm
2886
0444
edit
dl
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ExtUtils::MM_QNX.3pm
2942
0444
edit
dl
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ExtUtils::MM_Unix.3pm
21419
0444
edit
dl
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ExtUtils::MM_UWIN.3pm
3051
0444
edit
dl
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ExtUtils::MM_VMS.3pm
14900
0444
edit
dl
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ExtUtils::MM_VOS.3pm
2926
0444
edit
dl
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ExtUtils::MM_Win32.3pm
5919
0444
edit
dl
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ExtUtils::MM_Win95.3pm
3276
0444
edit
dl
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ExtUtils::MY.3pm
2764
0444
edit
dl
rm
ExtUtils::testlib.3pm
2690
0444
edit
dl
rm
File::GlobMapper.3pm
11447
0444
edit
dl
rm
File::HomeDir.3pm
18212
0444
edit
dl
rm
File::HomeDir::Darwin.3pm
3232
0444
edit
dl
rm
File::HomeDir::Darwin::Carbon.3pm
3517
0444
edit
dl
rm
File::HomeDir::Darwin::Cocoa.3pm
3446
0444
edit
dl
rm
File::HomeDir::Driver.3pm
3101
0444
edit
dl
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File::HomeDir::FreeDesktop.3pm
3487
0444
edit
dl
rm
File::HomeDir::MacOS9.3pm
3499
0444
edit
dl
rm
File::HomeDir::Test.3pm
3534
0444
edit
dl
rm
File::HomeDir::Unix.3pm
3638
0444
edit
dl
rm
File::HomeDir::Windows.3pm
4891
0444
edit
dl
rm
File::Path.3pm
31030
0444
edit
dl
rm
File::Slurp.3pm
23626
0444
edit
dl
rm
File::Spec.3pm
13784
0444
edit
dl
rm
File::Spec::AmigaOS.3pm
2826
0444
edit
dl
rm
File::Spec::Cygwin.3pm
3957
0444
edit
dl
rm
File::Spec::Epoc.3pm
3251
0444
edit
dl
rm
File::Spec::Functions.3pm
3799
0444
edit
dl
rm
File::Spec::Mac.3pm
18664
0444
edit
dl
rm
File::Spec::OS2.3pm
3118
0444
edit
dl
rm
File::Spec::Unix.3pm
9837
0444
edit
dl
rm
File::Spec::VMS.3pm
6389
0444
edit
dl
rm
File::Spec::Win32.3pm
6451
0444
edit
dl
rm
File::Temp.3pm
36799
0444
edit
dl
rm
File::Which.3pm
9746
0444
edit
dl
rm
Getopt::Long.3pm
52647
0444
edit
dl
rm
HDB.3pm
10947
0444
edit
dl
rm
HDB::CMDS.3pm
18894
0444
edit
dl
rm
HDB::Encode.3pm
7863
0444
edit
dl
rm
HDB::Object.3pm
10057
0444
edit
dl
rm
HTML::AsSubs.3pm
8586
0444
edit
dl
rm
HTML::Element.3pm
70793
0444
edit
dl
rm
HTML::Element::traverse.3pm
15984
0444
edit
dl
rm
HTML::Form.3pm
28158
0444
edit
dl
rm
HTML::Parse.3pm
8277
0444
edit
dl
rm
HTML::Tree.3pm
9982
0444
edit
dl
rm
HTML::Tree::AboutObjects.3pm
37918
0444
edit
dl
rm
HTML::Tree::AboutTrees.3pm
58534
0444
edit
dl
rm
HTML::Tree::Scanning.3pm
34385
0444
edit
dl
rm
HTML::TreeBuilder.3pm
30138
0444
edit
dl
rm
HTTP::Tiny.3pm
27709
0444
edit
dl
rm
IO::AtomicFile.3pm
5381
0444
edit
dl
rm
IO::Compress::Base.3pm
3506
0444
edit
dl
rm
IO::Compress::Bzip2.3pm
23260
0444
edit
dl
rm
IO::Compress::Deflate.3pm
26768
0444
edit
dl
rm
IO::Compress::FAQ.3pm
26718
0444
edit
dl
rm
IO::Compress::Gzip.3pm
34489
0444
edit
dl
rm
IO::Compress::RawDeflate.3pm
27134
0444
edit
dl
rm
IO::Compress::Zip.3pm
40870
0444
edit
dl
rm
IO::InnerFile.3pm
6035
0444
edit
dl
rm
IO::Lines.3pm
3783
0444
edit
dl
rm
IO::Pty.3pm
8579
0444
edit
dl
rm
IO::Scalar.3pm
10679
0444
edit
dl
rm
IO::ScalarArray.3pm
10528
0444
edit
dl
rm
IO::Stringy.3pm
4049
0444
edit
dl
rm
IO::Tty.3pm
8348
0444
edit
dl
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IO::Tty::Constant.3pm
10012
0444
edit
dl
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IO::Uncompress::AnyInflate.3pm
32800
0444
edit
dl
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IO::Uncompress::AnyUncompress.3pm
30767
0444
edit
dl
rm
IO::Uncompress::Base.3pm
3518
0444
edit
dl
rm
IO::Uncompress::Bunzip2.3pm
29171
0444
edit
dl
rm
IO::Uncompress::Gunzip.3pm
31719
0444
edit
dl
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IO::Uncompress::Inflate.3pm
29915
0444
edit
dl
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IO::Uncompress::RawInflate.3pm
29563
0444
edit
dl
rm
IO::Uncompress::Unzip.3pm
31279
0444
edit
dl
rm
IO::Wrap.3pm
10664
0444
edit
dl
rm
IO::WrapTie.3pm
14987
0444
edit
dl
rm
JSON::PP.3pm
50080
0444
edit
dl
rm
JSON::PP::Boolean.3pm
2667
0444
edit
dl
rm
JSON::Syck.3pm
8094
0444
edit
dl
rm
JSON::XS.3pm
89037
0444
edit
dl
rm
JSON::XS::Boolean.3pm
2857
0444
edit
dl
rm
lib::core::only.3pm
5647
0444
edit
dl
rm
local::lib.3pm
31390
0444
edit
dl
rm
LWP.3pm
28506
0444
edit
dl
rm
LWP::Authen::Ntlm.3pm
7489
0444
edit
dl
rm
LWP::ConnCache.3pm
9967
0444
edit
dl
rm
LWP::Debug.3pm
5608
0444
edit
dl
rm
LWP::MemberMixin.3pm
4821
0444
edit
dl
rm
LWP::Protocol.3pm
8350
0444
edit
dl
rm
LWP::Protocol::https.3pm
5684
0444
edit
dl
rm
LWP::RobotUA.3pm
9022
0444
edit
dl
rm
LWP::Simple.3pm
9016
0444
edit
dl
rm
LWP::UserAgent.3pm
48156
0444
edit
dl
rm
lwpcook.3pm
14838
0444
edit
dl
rm
lwptut.3pm
32441
0444
edit
dl
rm
Module::Build.3pm
44563
0444
edit
dl
rm
Module::Build::API.3pm
89267
0444
edit
dl
rm
Module::Build::Authoring.3pm
17363
0444
edit
dl
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Module::Build::Base.3pm
5157
0444
edit
dl
rm
Module::Build::Bundling.3pm
9999
0444
edit
dl
rm
Module::Build::Compat.3pm
10885
0444
edit
dl
rm
Module::Build::ConfigData.3pm
7388
0444
edit
dl
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Module::Build::Cookbook.3pm
25946
0444
edit
dl
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Module::Build::Notes.3pm
4690
0444
edit
dl
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Module::Build::Platform::aix.3pm
4472
0444
edit
dl
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Module::Build::Platform::cygwin.3pm
4505
0444
edit
dl
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Module::Build::Platform::darwin.3pm
4491
0444
edit
dl
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Module::Build::Platform::Default.3pm
4490
0444
edit
dl
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Module::Build::Platform::MacOS.3pm
5398
0444
edit
dl
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Module::Build::Platform::os2.3pm
4474
0444
edit
dl
rm
Module::Build::Platform::Unix.3pm
4481
0444
edit
dl
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Module::Build::Platform::VMS.3pm
7885
0444
edit
dl
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Module::Build::Platform::VOS.3pm
4477
0444
edit
dl
rm
Module::Build::Platform::Windows.3pm
4529
0444
edit
dl
rm
Module::Build::PPMMaker.3pm
4886
0444
edit
dl
rm
Mozilla::CA.3pm
3571
0444
edit
dl
rm
Net::CIDR::Lite.3pm
9562
0444
edit
dl
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Net::Cmd.3pm
11545
0444
edit
dl
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Net::Config.3pm
8100
0444
edit
dl
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Net::Domain.3pm
3835
0444
edit
dl
rm
Net::FTP.3pm
27341
0444
edit
dl
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Net::FTP::dataconn.3pm
3979
0444
edit
dl
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Net::HTTP.3pm
16375
0444
edit
dl
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Net::HTTP::NB.3pm
5394
0444
edit
dl
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Net::HTTPS.3pm
5438
0444
edit
dl
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Net::IP.3pm
27697
0444
edit
dl
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Net::libnetFAQ.3pm
14746
0444
edit
dl
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Net::Netrc.3pm
6729
0444
edit
dl
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Net::NNTP.3pm
23193
0444
edit
dl
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Net::POP3.3pm
12259
0444
edit
dl
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Net::SMTP.3pm
18880
0444
edit
dl
rm
Net::SSLeay.3pm
349350
0444
edit
dl
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Net::SSLeay::Handle.3pm
9127
0444
edit
dl
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Net::Time.3pm
4524
0444
edit
dl
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ok.3pm
2851
0444
edit
dl
rm
Parse::CPAN::Meta.3pm
10187
0444
edit
dl
rm
POD2::DE::local::lib.3pm
22879
0444
edit
dl
rm
POD2::PT_BR::local::lib.3pm
22762
0444
edit
dl
rm
Socket.3pm
34078
0444
edit
dl
rm
Sub::Identify.3pm
5087
0444
edit
dl
rm
SUPER.3pm
7394
0444
edit
dl
rm
Switch.3pm
19014
0444
edit
dl
rm
TAP::Base.3pm
3401
0444
edit
dl
rm
TAP::Formatter::Base.3pm
6233
0444
edit
dl
rm
TAP::Formatter::Color.3pm
3717
0444
edit
dl
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TAP::Formatter::Console.3pm
2722
0444
edit
dl
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TAP::Formatter::Console::ParallelSession.3pm
3065
0444
edit
dl
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TAP::Formatter::Console::Session.3pm
2832
0444
edit
dl
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TAP::Formatter::File.3pm
2693
0444
edit
dl
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TAP::Formatter::File::Session.3pm
2847
0444
edit
dl
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TAP::Formatter::Session.3pm
3603
0444
edit
dl
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TAP::Harness.3pm
21300
0444
edit
dl
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TAP::Harness::Beyond.3pm
19118
0444
edit
dl
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TAP::Harness::Env.3pm
5467
0444
edit
dl
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TAP::Object.3pm
4497
0444
edit
dl
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TAP::Parser.3pm
42210
0444
edit
dl
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TAP::Parser::Aggregator.3pm
8023
0444
edit
dl
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TAP::Parser::Grammar.3pm
8647
0444
edit
dl
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TAP::Parser::Iterator.3pm
4993
0444
edit
dl
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TAP::Parser::Iterator::Array.3pm
3771
0444
edit
dl
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TAP::Parser::Iterator::Process.3pm
4601
0444
edit
dl
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TAP::Parser::Iterator::Stream.3pm
3712
0444
edit
dl
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TAP::Parser::IteratorFactory.3pm
6904
0444
edit
dl
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TAP::Parser::Multiplexer.3pm
4646
0444
edit
dl
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TAP::Parser::Result.3pm
7512
0444
edit
dl
rm
TAP::Parser::Result::Bailout.3pm
3293
0444
edit
dl
rm
TAP::Parser::Result::Comment.3pm
3118
0444
edit
dl
rm
TAP::Parser::Result::Plan.3pm
4173
0444
edit
dl
rm
TAP::Parser::Result::Pragma.3pm
3073
0444
edit
dl
rm
TAP::Parser::Result::Test.3pm
7114
0444
edit
dl
rm
TAP::Parser::Result::Unknown.3pm
2973
0444
edit
dl
rm
TAP::Parser::Result::Version.3pm
3154
0444
edit
dl
rm
TAP::Parser::Result::YAML.3pm
3086
0444
edit
dl
rm
TAP::Parser::ResultFactory.3pm
5523
0444
edit
dl
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TAP::Parser::Scheduler.3pm
8113
0444
edit
dl
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TAP::Parser::Scheduler::Job.3pm
4301
0444
edit
dl
rm
TAP::Parser::Scheduler::Spinner.3pm
3346
0444
edit
dl
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TAP::Parser::Source.3pm
8170
0444
edit
dl
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TAP::Parser::SourceHandler.3pm
7559
0444
edit
dl
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TAP::Parser::SourceHandler::Executable.3pm
5297
0444
edit
dl
rm
TAP::Parser::SourceHandler::File.3pm
4567
0444
edit
dl
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TAP::Parser::SourceHandler::Handle.3pm
4425
0444
edit
dl
rm
TAP::Parser::SourceHandler::Perl.3pm
6262
0444
edit
dl
rm
TAP::Parser::SourceHandler::RawTAP.3pm
4434
0444
edit
dl
rm
TAP::Parser::YAMLish::Reader.3pm
3995
0444
edit
dl
rm
TAP::Parser::YAMLish::Writer.3pm
4879
0444
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Edit:
/usr/local/share/man/man3/version::Internals.3pm
(30287B)
.\" Automatically generated by Pod::Man 2.27 (Pod::Simple 3.28) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. Capital omega is used to do unbreakable dashes and .\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff, .\" nothing in troff, for use with C<>. .tr \(*W- .ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' .ie n \{\ . ds -- \(*W- . ds PI pi . if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch . if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch . ds L" "" . ds R" "" . ds C` "" . ds C' "" 'br\} .el\{\ . ds -- \|\(em\| . ds PI \(*p . ds L" `` . ds R" '' . ds C` . ds C' 'br\} .\" .\" Escape single quotes in literal strings from groff's Unicode transform. .ie \n(.g .ds Aq \(aq .el .ds Aq ' .\" .\" If the F register is turned on, we'll generate index entries on stderr for .\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index .\" entries marked with X<> in POD. Of course, you'll have to process the .\" output yourself in some meaningful fashion. .\" .\" Avoid warning from groff about undefined register 'F'. .de IX .. .nr rF 0 .if \n(.g .if rF .nr rF 1 .if (\n(rF:(\n(.g==0)) \{ . if \nF \{ . de IX . tm Index:\\$1\t\\n%\t"\\$2" .. . if !\nF==2 \{ . nr % 0 . nr F 2 . \} . \} .\} .rr rF .\" ======================================================================== .\" .IX Title "version::Internals 3" .TH version::Internals 3 "2018-04-11" "perl v5.16.3" "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" version::Internals \- Perl extension for Version Objects .SH "DESCRIPTION" .IX Header "DESCRIPTION" Overloaded version objects for all modern versions of Perl. This documents the internal data representation and underlying code for version.pm. See \&\fIversion.pod\fR for daily usage. This document is only useful for users interested in the gory details. .SH "WHAT IS A VERSION?" .IX Header "WHAT IS A VERSION?" For the purposes of this module, a version \*(L"number\*(R" is a sequence of positive integer values separated by one or more decimal points and optionally a single underscore. This corresponds to what Perl itself uses for a version, as well as extending the \*(L"version as number\*(R" that is discussed in the various editions of the Camel book. .PP There are actually two distinct kinds of version objects: .IP "Decimal versions" 4 .IX Item "Decimal versions" Any version which \*(L"looks like a number\*(R", see \*(L"Decimal Versions\*(R". This also includes versions with a single decimal point and a single embedded underscore, see \*(L"Alpha Versions\*(R", even though these must be quoted to preserve the underscore formatting. .IP "Dotted-Decimal versions" 4 .IX Item "Dotted-Decimal versions" Also referred to as \*(L"Dotted-Integer\*(R", these contains more than one decimal point and may have an optional embedded underscore, see Dotted-Decimal Versions. This is what is commonly used in most open source software as the \*(L"external\*(R" version (the one used as part of the tag or tarfile name). A leading 'v' character is now required and will warn if it missing. .PP Both of these methods will produce similar version objects, in that the default stringification will yield the version \*(L"Normal Form\*(R" only if required: .PP .Vb 3 \& $v = version\->new(1.002); # 1.002, but compares like 1.2.0 \& $v = version\->new(1.002003); # 1.002003 \& $v2 = version\->new("v1.2.3"); # v1.2.3 .Ve .PP In specific, version numbers initialized as \*(L"Decimal Versions\*(R" will stringify as they were originally created (i.e. the same string that was passed to \f(CW\*(C`new()\*(C'\fR. Version numbers initialized as \*(L"Dotted-Decimal Versions\*(R" will be stringified as \*(L"Normal Form\*(R". .SS "Decimal Versions" .IX Subsection "Decimal Versions" These correspond to historical versions of Perl itself prior to 5.6.0, as well as all other modules which follow the Camel rules for the \&\f(CW$VERSION\fR scalar. A Decimal version is initialized with what looks like a floating point number. Leading zeros \fBare\fR significant and trailing zeros are implied so that a minimum of three places is maintained between subversions. What this means is that any subversion (digits to the right of the decimal place) that contains less than three digits will have trailing zeros added to make up the difference, but only for purposes of comparison with other version objects. For example: .PP .Vb 7 \& # Prints Equivalent to \& $v = version\->new( 1.2); # 1.2 v1.200.0 \& $v = version\->new( 1.02); # 1.02 v1.20.0 \& $v = version\->new( 1.002); # 1.002 v1.2.0 \& $v = version\->new( 1.0023); # 1.0023 v1.2.300 \& $v = version\->new( 1.00203); # 1.00203 v1.2.30 \& $v = version\->new( 1.002003); # 1.002003 v1.2.3 .Ve .PP All of the preceding examples are true whether or not the input value is quoted. The important feature is that the input value contains only a single decimal. See also \*(L"Alpha Versions\*(R". .PP \&\s-1IMPORTANT NOTE:\s0 As shown above, if your Decimal version contains more than 3 significant digits after the decimal place, it will be split on each multiple of 3, so 1.0003 is equivalent to v1.0.300, due to the need to remain compatible with Perl's own 5.005_03 == 5.5.30 interpretation. Any trailing zeros are ignored for mathematical comparison purposes. .SS "Dotted-Decimal Versions" .IX Subsection "Dotted-Decimal Versions" These are the newest form of versions, and correspond to Perl's own version style beginning with 5.6.0. Starting with Perl 5.10.0, and most likely Perl 6, this is likely to be the preferred form. This method normally requires that the input parameter be quoted, although Perl's after 5.8.1 can use v\-strings as a special form of quoting, but this is highly discouraged. .PP Unlike \*(L"Decimal Versions\*(R", Dotted-Decimal Versions have more than a single decimal point, e.g.: .PP .Vb 6 \& # Prints \& $v = version\->new( "v1.200"); # v1.200.0 \& $v = version\->new("v1.20.0"); # v1.20.0 \& $v = qv("v1.2.3"); # v1.2.3 \& $v = qv("1.2.3"); # v1.2.3 \& $v = qv("1.20"); # v1.20.0 .Ve .PP In general, Dotted-Decimal Versions permit the greatest amount of freedom to specify a version, whereas Decimal Versions enforce a certain uniformity. .PP Just like \*(L"Decimal Versions\*(R", Dotted-Decimal Versions can be used as \&\*(L"Alpha Versions\*(R". .SS "Alpha Versions" .IX Subsection "Alpha Versions" For module authors using \s-1CPAN,\s0 the convention has been to note unstable releases with an underscore in the version string. (See \s-1CPAN\s0.) version.pm follows this convention and alpha releases will test as being newer than the more recent stable release, and less than the next stable release. Only the last element may be separated by an underscore: .PP .Vb 2 \& # Declaring \& use version 0.77; our $VERSION = version\->declare("v1.2_3"); \& \& # Parsing \& $v1 = version\->parse("v1.2_3"); \& $v1 = version\->parse("1.002_003"); .Ve .PP Note that you \fBmust\fR quote the version when writing an alpha Decimal version. The stringified form of Decimal versions will always be the same string that was used to initialize the version object. .SS "Regular Expressions for Version Parsing" .IX Subsection "Regular Expressions for Version Parsing" A formalized definition of the legal forms for version strings is included in the \f(CW\*(C`version::regex\*(C'\fR class. Primitives are included for common elements, although they are scoped to the file so they are useful for reference purposes only. There are two publicly accessible scalars that can be used in other code (not exported): .ie n .IP "$version::LAX" 4 .el .IP "\f(CW$version::LAX\fR" 4 .IX Item "$version::LAX" This regexp covers all of the legal forms allowed under the current version string parser. This is not to say that all of these forms are recommended, and some of them can only be used when quoted. .Sp For dotted decimals: .Sp .Vb 3 \& v1.2 \& 1.2345.6 \& v1.23_4 .Ve .Sp The leading 'v' is optional if two or more decimals appear. If only a single decimal is included, then the leading 'v' is required to trigger the dotted-decimal parsing. A leading zero is permitted, though not recommended except when quoted, because of the risk that Perl will treat the number as octal. A trailing underscore plus one or more digits denotes an alpha or development release (and must be quoted to be parsed properly). .Sp For decimal versions: .Sp .Vb 3 \& 1 \& 1.2345 \& 1.2345_01 .Ve .Sp an integer portion, an optional decimal point, and optionally one or more digits to the right of the decimal are all required. A trailing underscore is permitted and a leading zero is permitted. Just like the lax dotted-decimal version, quoting the values is required for alpha/development forms to be parsed correctly. .ie n .IP "$version::STRICT" 4 .el .IP "\f(CW$version::STRICT\fR" 4 .IX Item "$version::STRICT" This regexp covers a much more limited set of formats and constitutes the best practices for initializing version objects. Whether you choose to employ decimal or dotted-decimal for is a personal preference however. .RS 4 .IP "v1.234.5" 4 .IX Item "v1.234.5" For dotted-decimal versions, a leading 'v' is required, with three or more sub-versions of no more than three digits. A leading 0 (zero) before the first sub-version (in the above example, '1') is also prohibited. .IP "2.3456" 4 .IX Item "2.3456" For decimal versions, an integer portion (no leading 0), a decimal point, and one or more digits to the right of the decimal are all required. .RE .RS 4 .RE .PP Both of the provided scalars are already compiled as regular expressions and do not contain either anchors or implicit groupings, so they can be included in your own regular expressions freely. For example, consider the following code: .PP .Vb 6 \& ($pkg, $ver) =~ / \& ^[ \et]* \& use [ \et]+($PKGNAME) \& (?:[ \et]+($version::STRICT))? \& [ \et]*; \& /x; .Ve .PP This would match a line of the form: .PP .Vb 1 \& use Foo::Bar::Baz v1.2.3; # legal only in Perl 5.8.1+ .Ve .PP where \f(CW$PKGNAME\fR is another regular expression that defines the legal forms for package names. .SH "IMPLEMENTATION DETAILS" .IX Header "IMPLEMENTATION DETAILS" .SS "Equivalence between Decimal and Dotted-Decimal Versions" .IX Subsection "Equivalence between Decimal and Dotted-Decimal Versions" When Perl 5.6.0 was released, the decision was made to provide a transformation between the old-style decimal versions and new-style dotted-decimal versions: .PP .Vb 2 \& 5.6.0 == 5.006000 \& 5.005_04 == 5.5.40 .Ve .PP The floating point number is taken and split first on the single decimal place, then each group of three digits to the right of the decimal makes up the next digit, and so on until the number of significant digits is exhausted, \&\fBplus\fR enough trailing zeros to reach the next multiple of three. .PP This was the method that version.pm adopted as well. Some examples may be helpful: .PP .Vb 9 \& equivalent \& decimal zero\-padded dotted\-decimal \& \-\-\-\-\-\-\- \-\-\-\-\-\-\-\-\-\-\- \-\-\-\-\-\-\-\-\-\-\-\-\-\- \& 1.2 1.200 v1.200.0 \& 1.02 1.020 v1.20.0 \& 1.002 1.002 v1.2.0 \& 1.0023 1.002300 v1.2.300 \& 1.00203 1.002030 v1.2.30 \& 1.002003 1.002003 v1.2.3 .Ve .SS "Quoting Rules" .IX Subsection "Quoting Rules" Because of the nature of the Perl parsing and tokenizing routines, certain initialization values \fBmust\fR be quoted in order to correctly parse as the intended version, especially when using the \f(CW\*(C`declare\*(C'\fR or \&\*(L"\fIqv()\fR\*(R" methods. While you do not have to quote decimal numbers when creating version objects, it is always safe to quote \fBall\fR initial values when using version.pm methods, as this will ensure that what you type is what is used. .PP Additionally, if you quote your initializer, then the quoted value that goes \&\fBin\fR will be exactly what comes \fBout\fR when your \f(CW$VERSION\fR is printed (stringified). If you do not quote your value, Perl's normal numeric handling comes into play and you may not get back what you were expecting. .PP If you use a mathematic formula that resolves to a floating point number, you are dependent on Perl's conversion routines to yield the version you expect. You are pretty safe by dividing by a power of 10, for example, but other operations are not likely to be what you intend. For example: .PP .Vb 4 \& $VERSION = version\->new((qw$Revision: 1.4)[1]/10); \& print $VERSION; # yields 0.14 \& $V2 = version\->new(100/9); # Integer overflow in decimal number \& print $V2; # yields something like 11.111.111.100 .Ve .PP Perl 5.8.1 and beyond are able to automatically quote v\-strings but that is not possible in earlier versions of Perl. In other words: .PP .Vb 2 \& $version = version\->new("v2.5.4"); # legal in all versions of Perl \& $newvers = version\->new(v2.5.4); # legal only in Perl >= 5.8.1 .Ve .SS "What about v\-strings?" .IX Subsection "What about v-strings?" There are two ways to enter v\-strings: a bare number with two or more decimal points, or a bare number with one or more decimal points and a leading 'v' character (also bare). For example: .PP .Vb 2 \& $vs1 = 1.2.3; # encoded as \e1\e2\e3 \& $vs2 = v1.2; # encoded as \e1\e2 .Ve .PP However, the use of bare v\-strings to initialize version objects is \&\fBstrongly\fR discouraged in all circumstances. Also, bare v\-strings are not completely supported in any version of Perl prior to 5.8.1. .PP If you insist on using bare v\-strings with Perl > 5.6.0, be aware of the following limitations: .PP 1) For Perl releases 5.6.0 through 5.8.0, the v\-string code merely guesses, based on some characteristics of v\-strings. You \fBmust\fR use a three part version, e.g. 1.2.3 or v1.2.3 in order for this heuristic to be successful. .PP 2) For Perl releases 5.8.1 and later, v\-strings have changed in the Perl core to be magical, which means that the version.pm code can automatically determine whether the v\-string encoding was used. .PP 3) In all cases, a version created using v\-strings will have a stringified form that has a leading 'v' character, for the simple reason that sometimes it is impossible to tell whether one was present initially. .SS "Version Object Internals" .IX Subsection "Version Object Internals" version.pm provides an overloaded version object that is designed to both encapsulate the author's intended \f(CW$VERSION\fR assignment as well as make it completely natural to use those objects as if they were numbers (e.g. for comparisons). To do this, a version object contains both the original representation as typed by the author, as well as a parsed representation to ease comparisons. Version objects employ overload methods to simplify code that needs to compare, print, etc the objects. .PP The internal structure of version objects is a blessed hash with several components: .PP .Vb 11 \& bless( { \& \*(Aqoriginal\*(Aq => \*(Aqv1.2.3_4\*(Aq, \& \*(Aqalpha\*(Aq => 1, \& \*(Aqqv\*(Aq => 1, \& \*(Aqversion\*(Aq => [ \& 1, \& 2, \& 3, \& 4 \& ] \& }, \*(Aqversion\*(Aq ); .Ve .IP "original" 4 .IX Item "original" A faithful representation of the value used to initialize this version object. The only time this will not be precisely the same characters that exist in the source file is if a short dotted-decimal version like v1.2 was used (in which case it will contain 'v1.2'). This form is \&\fB\s-1STRONGLY\s0\fR discouraged, in that it will confuse you and your users. .IP "qv" 4 .IX Item "qv" A boolean that denotes whether this is a decimal or dotted-decimal version. See \*(L"\fIis_qv()\fR\*(R" in version. .IP "alpha" 4 .IX Item "alpha" A boolean that denotes whether this is an alpha version. \s-1NOTE:\s0 that the underscore can only appear in the last position. See \*(L"\fIis_alpha()\fR\*(R" in version. .IP "version" 4 .IX Item "version" An array of non-negative integers that is used for comparison purposes with other version objects. .SS "Replacement \s-1UNIVERSAL::VERSION\s0" .IX Subsection "Replacement UNIVERSAL::VERSION" In addition to the version objects, this modules also replaces the core \&\s-1UNIVERSAL::VERSION\s0 function with one that uses version objects for its comparisons. The return from this operator is always the stringified form as a simple scalar (i.e. not an object), but the warning message generated includes either the stringified form or the normal form, depending on how it was called. .PP For example: .PP .Vb 2 \& package Foo; \& $VERSION = 1.2; \& \& package Bar; \& $VERSION = "v1.3.5"; # works with all Perl\*(Aqs (since it is quoted) \& \& package main; \& use version; \& \& print $Foo::VERSION; # prints 1.2 \& \& print $Bar::VERSION; # prints 1.003005 \& \& eval "use foo 10"; \& print $@; # prints "foo version 10 required..." \& eval "use foo 1.3.5; # work in Perl 5.6.1 or better \& print $@; # prints "foo version 1.3.5 required..." \& \& eval "use bar 1.3.6"; \& print $@; # prints "bar version 1.3.6 required..." \& eval "use bar 1.004"; # note Decimal version \& print $@; # prints "bar version 1.004 required..." .Ve .PP \&\s-1IMPORTANT NOTE:\s0 This may mean that code which searches for a specific string (to determine whether a given module is available) may need to be changed. It is always better to use the built-in comparison implicit in \&\f(CW\*(C`use\*(C'\fR or \f(CW\*(C`require\*(C'\fR, rather than manually poking at \f(CW\*(C`class\->VERSION\*(C'\fR and then doing a comparison yourself. .PP The replacement \s-1UNIVERSAL::VERSION,\s0 when used as a function, like this: .PP .Vb 1 \& print $module\->VERSION; .Ve .PP will also exclusively return the stringified form. See \*(L"Stringification\*(R" for more details. .SH "USAGE DETAILS" .IX Header "USAGE DETAILS" .SS "Using modules that use version.pm" .IX Subsection "Using modules that use version.pm" As much as possible, the version.pm module remains compatible with all current code. However, if your module is using a module that has defined \&\f(CW$VERSION\fR using the version class, there are a couple of things to be aware of. For purposes of discussion, we will assume that we have the following module installed: .PP .Vb 4 \& package Example; \& use version; $VERSION = qv(\*(Aq1.2.2\*(Aq); \& ...module code here... \& 1; .Ve .IP "Decimal versions always work" 4 .IX Item "Decimal versions always work" Code of the form: .Sp .Vb 1 \& use Example 1.002003; .Ve .Sp will always work correctly. The \f(CW\*(C`use\*(C'\fR will perform an automatic \&\f(CW$VERSION\fR comparison using the floating point number given as the first term after the module name (e.g. above 1.002.003). In this case, the installed module is too old for the requested line, so you would see an error like: .Sp .Vb 1 \& Example version 1.002003 (v1.2.3) required\-\-this is only version 1.002002 (v1.2.2)... .Ve .IP "Dotted-Decimal version work sometimes" 4 .IX Item "Dotted-Decimal version work sometimes" With Perl >= 5.6.2, you can also use a line like this: .Sp .Vb 1 \& use Example 1.2.3; .Ve .Sp and it will again work (i.e. give the error message as above), even with releases of Perl which do not normally support v\-strings (see \*(L"What about v\-strings?\*(R" above). This has to do with that fact that \f(CW\*(C`use\*(C'\fR only checks to see if the second term \fIlooks like a number\fR and passes that to the replacement \s-1UNIVERSAL::VERSION\s0. This is not true in Perl 5.005_04, however, so you are \fBstrongly encouraged\fR to always use a Decimal version in your code, even for those versions of Perl which support the Dotted-Decimal version. .SS "Object Methods" .IX Subsection "Object Methods" .IP "\fInew()\fR" 4 .IX Item "new()" Like many \s-1OO\s0 interfaces, the \fInew()\fR method is used to initialize version objects. If two arguments are passed to \f(CW\*(C`new()\*(C'\fR, the \fBsecond\fR one will be used as if it were prefixed with \*(L"v\*(R". This is to support historical use of the \&\f(CW\*(C`qw\*(C'\fR operator with the \s-1CVS\s0 variable \f(CW$Revision\fR, which is automatically incremented by \s-1CVS\s0 every time the file is committed to the repository. .Sp In order to facilitate this feature, the following code can be employed: .Sp .Vb 1 \& $VERSION = version\->new(qw$Revision: 2.7 $); .Ve .Sp and the version object will be created as if the following code were used: .Sp .Vb 1 \& $VERSION = version\->new("v2.7"); .Ve .Sp In other words, the version will be automatically parsed out of the string, and it will be quoted to preserve the meaning \s-1CVS\s0 normally carries for versions. The \s-1CVS\s0 \f(CW$Revision\fR$ increments differently from Decimal versions (i.e. 1.10 follows 1.9), so it must be handled as if it were a Dotted-Decimal Version. .Sp A new version object can be created as a copy of an existing version object, either as a class method: .Sp .Vb 2 \& $v1 = version\->new(12.3); \& $v2 = version\->new($v1); .Ve .Sp or as an object method: .Sp .Vb 2 \& $v1 = version\->new(12.3); \& $v2 = $v1\->new(12.3); .Ve .Sp and in each case, \f(CW$v1\fR and \f(CW$v2\fR will be identical. \s-1NOTE:\s0 if you create a new object using an existing object like this: .Sp .Vb 1 \& $v2 = $v1\->new(); .Ve .Sp the new object \fBwill not\fR be a clone of the existing object. In the example case, \f(CW$v2\fR will be an empty object of the same type as \f(CW$v1\fR. .IP "\fIqv()\fR" 4 .IX Item "qv()" An alternate way to create a new version object is through the exported \&\fIqv()\fR sub. This is not strictly like other q? operators (like qq, qw), in that the only delimiters supported are parentheses (or spaces). It is the best way to initialize a short version without triggering the floating point interpretation. For example: .Sp .Vb 2 \& $v1 = qv(1.2); # v1.2.0 \& $v2 = qv("1.2"); # also v1.2.0 .Ve .Sp As you can see, either a bare number or a quoted string can usually be used interchangeably, except in the case of a trailing zero, which must be quoted to be converted properly. For this reason, it is strongly recommended that all initializers to \fIqv()\fR be quoted strings instead of bare numbers. .Sp To prevent the \f(CW\*(C`qv()\*(C'\fR function from being exported to the caller's namespace, either use version with a null parameter: .Sp .Vb 1 \& use version (); .Ve .Sp or just require version, like this: .Sp .Vb 1 \& require version; .Ve .Sp Both methods will prevent the \fIimport()\fR method from firing and exporting the \&\f(CW\*(C`qv()\*(C'\fR sub. .PP For the subsequent examples, the following three objects will be used: .PP .Vb 3 \& $ver = version\->new("1.2.3.4"); # see "Quoting Rules" \& $alpha = version\->new("1.2.3_4"); # see "Alpha Versions" \& $nver = version\->new(1.002); # see "Decimal Versions" .Ve .IP "Normal Form" 4 .IX Item "Normal Form" For any version object which is initialized with multiple decimal places (either quoted or if possible v\-string), or initialized using the \fIqv()\fR operator, the stringified representation is returned in a normalized or reduced form (no extraneous zeros), and with a leading 'v': .Sp .Vb 6 \& print $ver\->normal; # prints as v1.2.3.4 \& print $ver\->stringify; # ditto \& print $ver; # ditto \& print $nver\->normal; # prints as v1.2.0 \& print $nver\->stringify; # prints as 1.002, \& # see "Stringification" .Ve .Sp In order to preserve the meaning of the processed version, the normalized representation will always contain at least three sub terms. In other words, the following is guaranteed to always be true: .Sp .Vb 3 \& my $newver = version\->new($ver\->stringify); \& if ($newver eq $ver ) # always true \& {...} .Ve .IP "Numification" 4 .IX Item "Numification" Although all mathematical operations on version objects are forbidden by default, it is possible to retrieve a number which corresponds to the version object through the use of the \f(CW$obj\fR\->numify method. For formatting purposes, when displaying a number which corresponds a version object, all sub versions are assumed to have three decimal places. So for example: .Sp .Vb 2 \& print $ver\->numify; # prints 1.002003004 \& print $nver\->numify; # prints 1.002 .Ve .Sp Unlike the stringification operator, there is never any need to append trailing zeros to preserve the correct version value. .IP "Stringification" 4 .IX Item "Stringification" The default stringification for version objects returns exactly the same string as was used to create it, whether you used \f(CW\*(C`new()\*(C'\fR or \f(CW\*(C`qv()\*(C'\fR, with one exception. The sole exception is if the object was created using \&\f(CW\*(C`qv()\*(C'\fR and the initializer did not have two decimal places or a leading \&'v' (both optional), then the stringified form will have a leading 'v' prepended, in order to support round-trip processing. .Sp For example: .Sp .Vb 7 \& Initialized as Stringifies to \& ============== ============== \& version\->new("1.2") 1.2 \& version\->new("v1.2") v1.2 \& qv("1.2.3") 1.2.3 \& qv("v1.3.5") v1.3.5 \& qv("1.2") v1.2 ### exceptional case .Ve .Sp See also \s-1UNIVERSAL::VERSION\s0, as this also returns the stringified form when used as a class method. .Sp \&\s-1IMPORTANT NOTE:\s0 There is one exceptional cases shown in the above table where the \*(L"initializer\*(R" is not stringwise equivalent to the stringified representation. If you use the \f(CW\*(C`qv\*(C'\fR() operator on a version without a leading 'v' \fBand\fR with only a single decimal place, the stringified output will have a leading 'v', to preserve the sense. See the \*(L"\fIqv()\fR\*(R" operator for more details. .Sp \&\s-1IMPORTANT NOTE 2:\s0 Attempting to bypass the normal stringification rules by manually applying \fInumify()\fR and \fInormal()\fR will sometimes yield surprising results: .Sp .Vb 1 \& print version\->new(version\->new("v1.0")\->numify)\->normal; # v1.0.0 .Ve .Sp The reason for this is that the \fInumify()\fR operator will turn \*(L"v1.0\*(R" into the equivalent string \*(L"1.000000\*(R". Forcing the outer version object to \fInormal()\fR form will display the mathematically equivalent \*(L"v1.0.0\*(R". .Sp As the example in \*(L"\fInew()\fR\*(R" shows, you can always create a copy of an existing version object with the same value by the very compact: .Sp .Vb 1 \& $v2 = $v1\->new($v1); .Ve .Sp and be assured that both \f(CW$v1\fR and \f(CW$v2\fR will be completely equivalent, down to the same internal representation as well as stringification. .IP "Comparison operators" 4 .IX Item "Comparison operators" Both \f(CW\*(C`cmp\*(C'\fR and \f(CW\*(C`<=>\*(C'\fR operators perform the same comparison between terms (upgrading to a version object automatically). Perl automatically generates all of the other comparison operators based on those two. In addition to the obvious equalities listed below, appending a single trailing 0 term does not change the value of a version for comparison purposes. In other words \*(L"v1.2\*(R" and \*(L"1.2.0\*(R" will compare as identical. .Sp For example, the following relations hold: .Sp .Vb 7 \& As Number As String Truth Value \& \-\-\-\-\-\-\-\-\-\-\-\-\- \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- \-\-\-\-\-\-\-\-\-\-\- \& $ver > 1.0 $ver gt "1.0" true \& $ver < 2.5 $ver lt true \& $ver != 1.3 $ver ne "1.3" true \& $ver == 1.2 $ver eq "1.2" false \& $ver == 1.2.3.4 $ver eq "1.2.3.4" see discussion below .Ve .Sp It is probably best to chose either the Decimal notation or the string notation and stick with it, to reduce confusion. Perl6 version objects \&\fBmay\fR only support Decimal comparisons. See also \*(L"Quoting Rules\*(R". .Sp \&\s-1WARNING:\s0 Comparing version with unequal numbers of decimal points (whether explicitly or implicitly initialized), may yield unexpected results at first glance. For example, the following inequalities hold: .Sp .Vb 2 \& version\->new(0.96) > version\->new(0.95); # 0.960.0 > 0.950.0 \& version\->new("0.96.1") < version\->new(0.95); # 0.096.1 < 0.950.0 .Ve .Sp For this reason, it is best to use either exclusively \*(L"Decimal Versions\*(R" or \&\*(L"Dotted-Decimal Versions\*(R" with multiple decimal points. .IP "Logical Operators" 4 .IX Item "Logical Operators" If you need to test whether a version object has been initialized, you can simply test it directly: .Sp .Vb 2 \& $vobj = version\->new($something); \& if ( $vobj ) # true only if $something was non\-blank .Ve .Sp You can also test whether a version object is an alpha version, for example to prevent the use of some feature not present in the main release: .Sp .Vb 3 \& $vobj = version\->new("1.2_3"); # MUST QUOTE \& ...later... \& if ( $vobj\->is_alpha ) # True .Ve .SH "AUTHOR" .IX Header "AUTHOR" John Peacock <jpeacock@cpan.org> .SH "SEE ALSO" .IX Header "SEE ALSO" perl.
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