CONTRIBUTING000664001750001750 614612410354051 14233 0ustar00taitai000000000000PerlX-Maybe-1.001NAME CONTRIBUTING DESCRIPTION If you're reading this document, that means you might be thinking about helping me out with this project. Thanks! Here's some ways you could help out: * Bug reports Found a bug? Great! (Well, not so great I suppose.) The place to report them is . Don't e-mail me about it, as your e-mail is more than likely to get lost amongst the spam. An example script clearly demonstrating the bug (preferably written using Test::More) would be greatly appreciated. * Patches If you've found a bug and written a fix for it, even better! Generally speaking you should check out the latest copy of the code from the source repository rather than using the CPAN distribution. The file META.yml should contain a link to the source repository. If not, then try or submit a bug report. (As far as I'm concerned the lack of a link is a bug.) Many of my distributions are also mirrored at . To submit the patch, do a pull request on GitHub or Bitbucket, or attach a diff file to a bug report. Unless otherwise stated, I'll assume that your contributions are licensed under the same terms as the rest of the project. (If using git, feel free to work in a branch. For Mercurial, I'd prefer bookmarks within the default branch.) * Documentation If there's anything unclear in the documentation, please submit this as a bug report or patch as above. Non-toy example scripts that I can bundle would also be appreciated. * Translation Translations of documentation would be welcome. For translations of error messages and other strings embedded in the code, check with me first. Sometimes the English strings may not in a stable state, so it would be a waste of time translating them. Coding Style I tend to write using something approximating the Allman style, using tabs for indentation and Unix-style line breaks. * * I nominally encode all source files as UTF-8, though in practice most of them use a 7-bit-safe ASCII-compatible subset of UTF-8. AUTHOR Toby Inkster . COPYRIGHT AND LICENCE Copyright (c) 2012-2014 by Toby Inkster. CONTRIBUTING is available under three different licences permitting its redistribution: the CC-BY-SA_UK-2.0 licence, plus the same licences as Perl itself, which is distributed under the GNU General Public Licence version 1, and the Artistic Licence. This file is licensed under the Creative Commons Attribution-ShareAlike 2.0 UK: England & Wales License. To view a copy of this license, visit . This file is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. COPYRIGHT000664001750001750 231012410354052 13662 0ustar00taitai000000000000PerlX-Maybe-1.001Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/ Upstream-Name: PerlX-Maybe Upstream-Contact: Toby Inkster (TOBYINK) Source: https://metacpan.org/release/PerlX-Maybe Files: Changes META.json META.yml doap.ttl Copyright: Copyright 2014 Toby Inkster. License: GPL-1.0+ or Artistic-1.0 Files: COPYRIGHT CREDITS SIGNATURE Copyright: None License: public-domain Files: Makefile.PL dist.ini t/03provided.t Copyright: Copyright 2013 Toby Inkster. License: GPL-1.0+ or Artistic-1.0 Files: README lib/PerlX/Maybe.pm lib/Syntax/Feature/Maybe.pm Copyright: This software is copyright (c) 2012-2013 by Toby Inkster. License: GPL-1.0+ or Artistic-1.0 Files: CONTRIBUTING INSTALL LICENSE Copyright: Unknown License: Unknown Files: t/01basic.t t/02maybe.t Copyright: Copyright 2012 Toby Inkster. License: GPL-1.0+ or Artistic-1.0 License: Artistic-1.0 This software is Copyright (c) 2014 by the copyright holder(s). This is free software, licensed under: The Artistic License 1.0 License: GPL-1.0 This software is Copyright (c) 2014 by the copyright holder(s). This is free software, licensed under: The GNU General Public License, Version 1, February 1989 CREDITS000664001750001750 12212410354044 13367 0ustar00taitai000000000000PerlX-Maybe-1.001Maintainer: - Toby Inkster (TOBYINK) Thanks: - Darin McBride Changes000664001750001750 211512410354044 13666 0ustar00taitai000000000000PerlX-Maybe-1.001PerlX-Maybe =========== Created: 2012-02-15 Home page: Bug tracker: Maintainer: Toby Inkster (TOBYINK) 1.001 2014-09-23 [ Packaging ] - Package using newer version of Dist::Inkt. [ Other ] - use warnings. 1.000 2013-08-27 0.999_02 2013-08-10 [ Packaging ] - Add myself as maintainer rather than developer; this should ensure that I don't get listed in 'x_contributors'. 0.999_01 2013-08-10 [ Packaging ] - Switch to Dist::Inkt. 0.004 2013-05-12 - Silence warnings under 'perl -w'. (But you shouldn't use 'perl -w' anyway.) 0.003 2013-03-12 - Optionally export 'provided' function. Darin McBride++ - Use PerlX::Maybe::XS if it's available - roughly 30% faster. 0.002 2012-05-03 - Faster implementation. Tested on Perl 5.10.1 on Linux, the new version is 60% faster. (Not that it was slow to begin with - 'maybe' is a pretty simple function.) 0.001 2012-02-15 Initial release INSTALL000664001750001750 166512410354043 13434 0ustar00taitai000000000000PerlX-Maybe-1.001 Installing PerlX-Maybe should be straightforward. INSTALLATION WITH CPANMINUS If you have cpanm, you only need one line: % cpanm PerlX::Maybe If you are installing into a system-wide directory, you may need to pass the "-S" flag to cpanm, which uses sudo to install the module: % cpanm -S PerlX::Maybe INSTALLATION WITH THE CPAN SHELL Alternatively, if your CPAN shell is set up, you should just be able to do: % cpan PerlX::Maybe MANUAL INSTALLATION As a last resort, you can manually install it. Download the tarball and unpack it. Consult the file META.json for a list of pre-requisites. Install these first. To build PerlX-Maybe: % perl Makefile.PL % make && make test Then install it: % make install If you are installing into a system-wide directory, you may need to run: % sudo make install LICENSE000664001750001750 4365512410354043 13435 0ustar00taitai000000000000PerlX-Maybe-1.001This software is copyright (c) 2014 by Toby Inkster. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. Terms of the Perl programming language system itself a) the GNU General Public License as published by the Free Software Foundation; either version 1, or (at your option) any later version, or b) the "Artistic License" --- The GNU General Public License, Version 1, February 1989 --- This software is Copyright (c) 2014 by Toby Inkster. This is free software, licensed under: The GNU General Public License, Version 1, February 1989 GNU GENERAL PUBLIC LICENSE Version 1, February 1989 Copyright (C) 1989 Free Software Foundation, Inc. 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The license agreements of most software companies try to keep users at the mercy of those companies. By contrast, our General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. The General Public License applies to the Free Software Foundation's software and to any other program whose authors commit to using it. You can use it for your programs, too. When we speak of free software, we are referring to freedom, not price. Specifically, the General Public License is designed to make sure that you have the freedom to give away or sell copies of free software, that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things. To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it. For example, if you distribute copies of a such a program, whether gratis or for a fee, you must give the recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. And you must tell them their rights. We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal permission to copy, distribute and/or modify the software. Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty for this free software. If the software is modified by someone else and passed on, we want its recipients to know that what they have is not the original, so that any problems introduced by others will not reflect on the original authors' reputations. The precise terms and conditions for copying, distribution and modification follow. GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 0. This License Agreement applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any work containing the Program or a portion of it, either verbatim or with modifications. Each licensee is addressed as "you". 1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this General Public License and to the absence of any warranty; and give any other recipients of the Program a copy of this General Public License along with the Program. You may charge a fee for the physical act of transferring a copy. 2. 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Each version is given a distinguishing version number. If the Program specifies a version number of the license which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of the license, you may choose any version ever published by the Free Software Foundation. 8. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 9. 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IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS Appendix: How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to humanity, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) 19yy This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 1, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) 19xx name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (a program to direct compilers to make passes at assemblers) written by James Hacker. , 1 April 1989 Ty Coon, President of Vice That's all there is to it! --- The Artistic License 1.0 --- This software is Copyright (c) 2014 by Toby Inkster. This is free software, licensed under: The Artistic License 1.0 The Artistic License Preamble The intent of this document is to state the conditions under which a Package may be copied, such that the Copyright Holder maintains some semblance of artistic control over the development of the package, while giving the users of the package the right to use and distribute the Package in a more-or-less customary fashion, plus the right to make reasonable modifications. 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However, you may distribute this Package in aggregate with other (possibly commercial) programs as part of a larger (possibly commercial) software distribution provided that you do not advertise this Package as a product of your own. 6. The scripts and library files supplied as input to or produced as output from the programs of this Package do not automatically fall under the copyright of this Package, but belong to whomever generated them, and may be sold commercially, and may be aggregated with this Package. 7. C or perl subroutines supplied by you and linked into this Package shall not be considered part of this Package. 8. The name of the Copyright Holder may not be used to endorse or promote products derived from this software without specific prior written permission. 9. THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. The End MANIFEST000664001750001750 33012410354052 13500 0ustar00taitai000000000000PerlX-Maybe-1.001CONTRIBUTING COPYRIGHT CREDITS Changes INSTALL LICENSE MANIFEST META.json META.yml Makefile.PL README SIGNATURE dist.ini doap.ttl lib/PerlX/Maybe.pm lib/Syntax/Feature/Maybe.pm t/01basic.t t/02maybe.t t/03provided.t META.json000664001750001750 363512410354051 14022 0ustar00taitai000000000000PerlX-Maybe-1.001{ "abstract" : "return a pair only if they are both defined", "author" : [ "Toby Inkster (TOBYINK) " ], "dynamic_config" : 0, "generated_by" : "Dist::Inkt::Profile::TOBYINK version 0.023, CPAN::Meta::Converter version 2.140640", "keywords" : [], "license" : [ "perl_5" ], "meta-spec" : { "url" : "http://search.cpan.org/perldoc?CPAN::Meta::Spec", "version" : "2" }, "name" : "PerlX-Maybe", "no_index" : { "directory" : [ "eg", "examples", "inc", "t", "xt" ] }, "optional_features" : {}, "prereqs" : { "configure" : { "requires" : { "ExtUtils::MakeMaker" : "6.17" } }, "develop" : { "recommends" : { "Dist::Inkt" : "0" } }, "runtime" : { "recommends" : { "PerlX::Maybe::XS" : "0" }, "requires" : { "perl" : "5.006" } }, "test" : { "requires" : { "Test::More" : "0.61" } } }, "provides" : { "PerlX::Maybe" : { "file" : "lib/PerlX/Maybe.pm", "version" : "1.001" }, "Syntax::Feature::Maybe" : { "file" : "lib/Syntax/Feature/Maybe.pm", "version" : "1.001" } }, "release_status" : "stable", "resources" : { "bugtracker" : { "web" : "http://rt.cpan.org/Dist/Display.html?Queue=PerlX-Maybe" }, "homepage" : "https://metacpan.org/release/PerlX-Maybe", "license" : [ "http://dev.perl.org/licenses/" ], "repository" : { "type" : "git", "url" : "git://github.com/tobyink/p5-perlx-maybe.git", "web" : "https://github.com/tobyink/p5-perlx-maybe" }, "x_identifier" : "http://purl.org/NET/cpan-uri/dist/PerlX-Maybe/project" }, "version" : "1.001" } META.yml000664001750001750 210412410354051 13640 0ustar00taitai000000000000PerlX-Maybe-1.001--- abstract: 'return a pair only if they are both defined' author: - 'Toby Inkster (TOBYINK) ' build_requires: Test::More: '0.61' configure_requires: ExtUtils::MakeMaker: '6.17' dynamic_config: 0 generated_by: 'Dist::Inkt::Profile::TOBYINK version 0.023, CPAN::Meta::Converter version 2.140640' keywords: [] license: perl meta-spec: url: http://module-build.sourceforge.net/META-spec-v1.4.html version: '1.4' name: PerlX-Maybe no_index: directory: - eg - examples - inc - t - xt optional_features: {} provides: PerlX::Maybe: file: lib/PerlX/Maybe.pm version: '1.001' Syntax::Feature::Maybe: file: lib/Syntax/Feature/Maybe.pm version: '1.001' recommends: PerlX::Maybe::XS: '0' requires: perl: '5.006' resources: Identifier: http://purl.org/NET/cpan-uri/dist/PerlX-Maybe/project bugtracker: http://rt.cpan.org/Dist/Display.html?Queue=PerlX-Maybe homepage: https://metacpan.org/release/PerlX-Maybe license: http://dev.perl.org/licenses/ repository: git://github.com/tobyink/p5-perlx-maybe.git version: '1.001' Makefile.PL000664001750001750 1163712410354051 14374 0ustar00taitai000000000000PerlX-Maybe-1.001use strict; use ExtUtils::MakeMaker 6.17; my $EUMM = eval( $ExtUtils::MakeMaker::VERSION ); my $meta = { "abstract" => "return a pair only if they are both defined", "author" => ["Toby Inkster (TOBYINK) "], "dynamic_config" => 0, "generated_by" => "Dist::Inkt::Profile::TOBYINK version 0.023, CPAN::Meta::Converter version 2.140640", "keywords" => [], "license" => ["perl_5"], "meta-spec" => { url => "http://search.cpan.org/perldoc?CPAN::Meta::Spec", version => 2, }, "name" => "PerlX-Maybe", "no_index" => { directory => ["eg", "examples", "inc", "t", "xt"] }, "prereqs" => { configure => { requires => { "ExtUtils::MakeMaker" => 6.17 } }, develop => { recommends => { "Dist::Inkt" => 0 } }, runtime => { recommends => { "PerlX::Maybe::XS" => 0 }, requires => { perl => 5.006 }, }, test => { requires => { "Test::More" => 0.61 } }, }, "provides" => { "PerlX::Maybe" => { file => "lib/PerlX/Maybe.pm", version => 1.001 }, "Syntax::Feature::Maybe" => { file => "lib/Syntax/Feature/Maybe.pm", version => 1.001 }, }, "release_status" => "stable", "resources" => { bugtracker => { web => "http://rt.cpan.org/Dist/Display.html?Queue=PerlX-Maybe" }, homepage => "https://metacpan.org/release/PerlX-Maybe", license => ["http://dev.perl.org/licenses/"], repository => { type => "git", url => "git://github.com/tobyink/p5-perlx-maybe.git", web => "https://github.com/tobyink/p5-perlx-maybe", }, x_identifier => "http://purl.org/NET/cpan-uri/dist/PerlX-Maybe/project", }, "version" => 1.001, }; my %dynamic_config; my %WriteMakefileArgs = ( ABSTRACT => $meta->{abstract}, AUTHOR => ($EUMM >= 6.5702 ? $meta->{author} : $meta->{author}[0]), DISTNAME => $meta->{name}, VERSION => $meta->{version}, EXE_FILES => [ map $_->{file}, values %{ $meta->{x_provides_scripts} || {} } ], NAME => do { my $n = $meta->{name}; $n =~ s/-/::/g; $n }, test => { TESTS => "t/*.t" }, %dynamic_config, ); $WriteMakefileArgs{LICENSE} = $meta->{license}[0] if $EUMM >= 6.3001; sub deps { my %r; for my $stage (@_) { for my $dep (keys %{$meta->{prereqs}{$stage}{requires}}) { next if $dep eq 'perl'; my $ver = $meta->{prereqs}{$stage}{requires}{$dep}; $r{$dep} = $ver if !exists($r{$dep}) || $ver >= $r{$dep}; } } \%r; } my ($build_requires, $configure_requires, $runtime_requires, $test_requires); if ($EUMM >= 6.6303) { $WriteMakefileArgs{BUILD_REQUIRES} ||= deps('build'); $WriteMakefileArgs{CONFIGURE_REQUIRES} ||= deps('configure'); $WriteMakefileArgs{TEST_REQUIRES} ||= deps('test'); $WriteMakefileArgs{PREREQ_PM} ||= deps('runtime'); } elsif ($EUMM >= 6.5503) { $WriteMakefileArgs{BUILD_REQUIRES} ||= deps('build', 'test'); $WriteMakefileArgs{CONFIGURE_REQUIRES} ||= deps('configure'); $WriteMakefileArgs{PREREQ_PM} ||= deps('runtime'); } elsif ($EUMM >= 6.52) { $WriteMakefileArgs{CONFIGURE_REQUIRES} ||= deps('configure'); $WriteMakefileArgs{PREREQ_PM} ||= deps('runtime', 'build', 'test'); } else { $WriteMakefileArgs{PREREQ_PM} ||= deps('configure', 'build', 'test', 'runtime'); } { my ($minperl) = reverse sort( grep defined && /^[0-9]+(\.[0-9]+)?$/, map $meta->{prereqs}{$_}{requires}{perl}, qw( configure build runtime ) ); if (defined($minperl)) { die "Installing $meta->{name} requires Perl >= $minperl" unless $] >= $minperl; $WriteMakefileArgs{MIN_PERL_VERSION} ||= $minperl if $EUMM >= 6.48; } } sub FixMakefile { return unless -d 'inc'; my $file = shift; local *MAKEFILE; open MAKEFILE, "< $file" or die "FixMakefile: Couldn't open $file: $!; bailing out"; my $makefile = do { local $/; }; close MAKEFILE or die $!; $makefile =~ s/\b(test_harness\(\$\(TEST_VERBOSE\), )/$1'inc', /; $makefile =~ s/( -I\$\(INST_ARCHLIB\))/ -Iinc$1/g; $makefile =~ s/( "-I\$\(INST_LIB\)")/ "-Iinc"$1/g; $makefile =~ s/^(FULLPERL = .*)/$1 "-Iinc"/m; $makefile =~ s/^(PERL = .*)/$1 "-Iinc"/m; open MAKEFILE, "> $file" or die "FixMakefile: Couldn't open $file: $!; bailing out"; print MAKEFILE $makefile or die $!; close MAKEFILE or die $!; } my $mm = WriteMakefile(%WriteMakefileArgs); FixMakefile($mm->{FIRST_MAKEFILE} || 'Makefile'); exit(0); README000664001750001750 743012410354043 13257 0ustar00taitai000000000000PerlX-Maybe-1.001NAME PerlX::Maybe - return a pair only if they are both defined SYNOPSIS You once wrote: my $bob = Person->new( defined $name ? (name => $name) : (), defined $age ? (age => $age) : (), ); Now you can write: my $bob = Person->new( maybe name => $name, maybe age => $age, ); DESCRIPTION Moose classes (and some other classes) distinguish between an attribute being unset and the attribute being set to undef. Supplying a constructor arguments like this: my $bob = Person->new( name => $name, age => $age, ); Will result in the `name` and `age` attributes possibly being set to undef (if the corresponding $name and $age variables are not defined), which may violate the Person class' type constraints. (Note: if you are the *author* of the class in question, you can solve this using MooseX::UndefTolerant. However, some of us are stuck using non-UndefTolerant classes written by third parties.) To ensure that the Person constructor does not try to set a name or age at all when they are undefined, ugly looking code like this is often used: my $bob = Person->new( defined $name ? (name => $name) : (), defined $age ? (age => $age) : (), ); or: my $bob = Person->new( (name => $name) x!!(defined $name), (age => $age) x!!(defined $age), ); A slightly more elegant solution is the `maybe` function. Functions `maybe $x => $y, @rest` This function checks that $x and $y are both defined. If they are, it returns them both as a list; otherwise it returns the empty list. If @rest is provided, it is unconditionally appended to the end of whatever list is returned. The combination of these behaviours allows the following very sugary syntax to "just work". my $bob = Person->new( name => $name, address => $addr, maybe phone => $tel, maybe email => $email, unique_id => $id, ); This function is exported by default. `provided $condition, $x => $y, @rest` Like `maybe` but allows you to use a custom condition expression: my $bob = Person->new( name => $name, address => $addr, provided length($tel), phone => $tel, provided $email =~ /\@/, email => $email, unique_id => $id, ); This function is not exported by default. `PerlX::Maybe::IMPLEMENTATION` Indicates whether the XS backend PerlX::Maybe::XS was loaded. XS Backend If you install PerlX::Maybe::XS, a faster XS-based implementation will be used instead of the pure Perl functions. My basic benchmarking experiments seem to show this to be around 30% faster. Environment The environment variable `PERLX_MAYBE_IMPLEMENTATION` may be set to "PP" to prevent the XS backend from loading. BUGS Please report any bugs to . SEE ALSO Syntax::Feature::Maybe, PerlX::Maybe::XS. MooseX::UndefTolerant, PerlX::Perform, Exporter. AUTHOR Toby Inkster . COPYRIGHT AND LICENCE This software is copyright (c) 2012-2013 by Toby Inkster. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. DISCLAIMER OF WARRANTIES THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. SIGNATURE000664001750001750 332512410354063 13664 0ustar00taitai000000000000PerlX-Maybe-1.001This file contains message digests of all files listed in MANIFEST, signed via the Module::Signature module, version 0.73. To verify the content in this distribution, first make sure you have Module::Signature installed, then type: % cpansign -v It will check each file's integrity, as well as the signature's validity. 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Tested on Perl 5.10.1 on Linux, the new version is 60% faster. (Not that it was slow to begin with - 'maybe' is a pretty simple function.)"@en; ]; doap-changeset:versus ; ]; doap:file-release ; doap:revision "0.002"^^xsd:string. a doap:Version; dc:issued "2013-03-12"^^xsd:date; doap-changeset:changeset [ doap-changeset:item [ rdfs:label "Use PerlX::Maybe::XS if it's available - roughly 30% faster."@en; ], [ rdfs:label "Optionally export 'provided' function."@en; doap-changeset:thanks [ foaf:name "Darin McBride"; foaf:nick "DMCBRIDE"; ]; rdfs:seeAlso ; ]; doap-changeset:versus ; ]; doap:file-release ; doap:revision "0.003"^^xsd:string. a doap:Version; dc:issued "2013-05-12"^^xsd:date; doap-changeset:changeset [ doap-changeset:item [ rdfs:label "Silence warnings under 'perl -w'. (But you shouldn't use 'perl -w' anyway.)"@en; ]; doap-changeset:versus ; ]; doap:file-release ; doap:revision "0.004"^^xsd:string. a doap:Version; dc:issued "2013-08-10"^^xsd:date; doap-changeset:changeset [ doap-changeset:item [ a doap-changeset:Packaging; rdfs:label "Switch to Dist::Inkt."@en; ]; doap-changeset:versus ; ]; doap:file-release ; doap:revision "0.999_01"^^xsd:string. a doap:Version; dc:issued "2013-08-10"^^xsd:date; doap-changeset:changeset [ doap-changeset:item [ a doap-changeset:Packaging; rdfs:label "Add myself as maintainer rather than developer; this should ensure that I don't get listed in 'x_contributors'."@en; ]; doap-changeset:versus ; ]; doap:file-release ; doap:revision "0.999_02"^^xsd:string. a doap:Version; dc:issued "2013-08-27"^^xsd:date; doap:file-release ; doap:revision "1.000"^^xsd:string; rdfs:comment "No functional changes.". a doap:Version; dc:issued "2014-09-23"^^xsd:date; doap-changeset:changeset [ doap-changeset:item [ a doap-changeset:Packaging; rdfs:label "Package using newer version of Dist::Inkt."@en; ], [ a doap-changeset:Change; rdfs:label "use warnings."@en; ]; ]; doap:file-release ; doap:revision "1.001"^^xsd:string. a foaf:Person; foaf:mbox ; foaf:name "Toby Inkster". 01basic.t000664001750001750 7612410354042 14207 0ustar00taitai000000000000PerlX-Maybe-1.001/tuse Test::More tests => 1; BEGIN { use_ok('PerlX::Maybe') }; 02maybe.t000664001750001750 65212410354042 14244 0ustar00taitai000000000000PerlX-Maybe-1.001/tuse Test::More tests => 3; use PerlX::Maybe; is_deeply( [ maybe foo => undef, maybe bar => 0, maybe baz => 1, undef ], [ bar => 0, baz => 1, undef ], ); is_deeply( [ 3, maybe foo => undef, 4, maybe bar => 0, 5, maybe baz => 1 ], [ 3, 4, bar => 0, 5, baz => 1 ], ); is_deeply( [ 3, maybe foo => {quux=>1}, undef, 4, maybe bar => 0, 5, maybe baz => 1 ], [ 3, foo => {quux=>1}, undef, 4, bar => 0, 5, baz => 1 ], ); 03provided.t000664001750001750 50312410354042 14757 0ustar00taitai000000000000PerlX-Maybe-1.001/tuse strict; use warnings; use Test::More tests => 1; use PerlX::Maybe ':all'; is_deeply( [ provided 0, foo => 1, 6, provided 1, bar => 2, 7, provided 0, baz => 3, 8, provided undef, quux => 4, 9, provided [], quuux => 5, 10, ], [ 6, bar => 2, 7, 8, 9, quuux => 5, 10, ] ); Maybe.pm000664001750001750 1066012410354042 15610 0ustar00taitai000000000000PerlX-Maybe-1.001/lib/PerlXuse 5.006; use strict; use warnings; package PerlX::Maybe; BEGIN { our $AUTHORITY = 'cpan:TOBYINK'; our $VERSION = '1.001'; require Exporter; our @ISA = qw/ Exporter /; our @EXPORT = qw/ maybe /; our @EXPORT_OK = qw/ maybe provided /; our %EXPORT_TAGS = (all => \@EXPORT_OK, default => \@EXPORT); } unless (($ENV{PERLX_MAYBE_IMPLEMENTATION}||'') =~ /pp/i) { eval q{ use PerlX::Maybe::XS 0.003 ':all' }; } __PACKAGE__->can('maybe') ? eval <<'END_XS' : eval <<'END_PP'; sub IMPLEMENTATION () { "XS" } END_XS sub IMPLEMENTATION () { "PP" } sub maybe ($$@) { if (defined $_[0] and defined $_[1]) { @_ } else { (scalar @_ > 1) ? @_[2 .. $#_] : qw() } } sub provided ($$$@) { if (shift) { @_ } else { (scalar @_ > 1) ? @_[2 .. $#_] : qw() } } END_PP __FILE__ __END__ =pod =encoding utf8 =for stopwords benchmarking =head1 NAME PerlX::Maybe - return a pair only if they are both defined =head1 SYNOPSIS You once wrote: my $bob = Person->new( defined $name ? (name => $name) : (), defined $age ? (age => $age) : (), ); Now you can write: my $bob = Person->new( maybe name => $name, maybe age => $age, ); =head1 DESCRIPTION Moose classes (and some other classes) distinguish between an attribute being unset and the attribute being set to undef. Supplying a constructor arguments like this: my $bob = Person->new( name => $name, age => $age, ); Will result in the C and C attributes possibly being set to undef (if the corresponding C<$name> and C<$age> variables are not defined), which may violate the Person class' type constraints. (Note: if you are the I of the class in question, you can solve this using L. However, some of us are stuck using non-UndefTolerant classes written by third parties.) To ensure that the Person constructor does not try to set a name or age at all when they are undefined, ugly looking code like this is often used: my $bob = Person->new( defined $name ? (name => $name) : (), defined $age ? (age => $age) : (), ); or: my $bob = Person->new( (name => $name) x!!(defined $name), (age => $age) x!!(defined $age), ); A slightly more elegant solution is the C function. =head2 Functions =over =item C<< maybe $x => $y, @rest >> This function checks that C<< $x >> and C<< $y >> are both defined. If they are, it returns them both as a list; otherwise it returns the empty list. If C<< @rest >> is provided, it is unconditionally appended to the end of whatever list is returned. The combination of these behaviours allows the following very sugary syntax to "just work". my $bob = Person->new( name => $name, address => $addr, maybe phone => $tel, maybe email => $email, unique_id => $id, ); This function is exported by default. =item C<< provided $condition, $x => $y, @rest >> Like C but allows you to use a custom condition expression: my $bob = Person->new( name => $name, address => $addr, provided length($tel), phone => $tel, provided $email =~ /\@/, email => $email, unique_id => $id, ); This function is not exported by default. =item C<< PerlX::Maybe::IMPLEMENTATION >> Indicates whether the XS backend L was loaded. =back =head2 XS Backend If you install L, a faster XS-based implementation will be used instead of the pure Perl functions. My basic benchmarking experiments seem to show this to be around 30% faster. =head2 Environment The environment variable C may be set to C<< "PP" >> to prevent the XS backend from loading. =head1 BUGS Please report any bugs to L. =head1 SEE ALSO L, L. L, L, L. =head1 AUTHOR Toby Inkster Etobyink@cpan.orgE. =head1 COPYRIGHT AND LICENCE This software is copyright (c) 2012-2013 by Toby Inkster. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. =head1 DISCLAIMER OF WARRANTIES THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. Maybe.pm000664001750001750 221412410354042 17413 0ustar00taitai000000000000PerlX-Maybe-1.001/lib/Syntax/Featureuse 5.006; use strict; use warnings; use PerlX::Maybe qw//; package Syntax::Feature::Maybe; BEGIN { our $AUTHORITY = 'cpan:TOBYINK'; our $VERSION = '1.001'; } sub install { my ($class, %args) = @_; my $into = delete($args{into}); foreach my $f (qw/maybe/) { no strict 'refs'; *{"$into\::$f"} = \&{"PerlX::Maybe::$f"}; } } __FILE__ __END__ =pod =encoding utf8 =head1 NAME Syntax::Feature::Maybe - use syntax qw/maybe/ =head1 DESCRIPTION Tiny shim between L and L. =head1 BUGS Please report any bugs to L. =head1 SEE ALSO L, L. =head1 AUTHOR Toby Inkster Etobyink@cpan.orgE. =head1 COPYRIGHT AND LICENCE This software is copyright (c) 2012-2013 by Toby Inkster. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. =head1 DISCLAIMER OF WARRANTIES THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.