COPYRIGHT000644001750001750 254513376512574 13715 0ustar00taitai000000000000PerlX-Maybe-1.201Format: 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 t/04provided_deref.t t/05provided_deref_with_maybe.t Copyright: Copyright 2018 Toby Inkster. License: GPL-1.0+ or Artistic-1.0 Files: Makefile.PL dist.ini t/03provided.t Copyright: Copyright 2013 Toby Inkster. License: GPL-1.0+ or Artistic-1.0 Files: COPYRIGHT CREDITS SIGNATURE Copyright: None License: public-domain Files: t/01basic.t t/02maybe.t Copyright: Copyright 2012 Toby Inkster. License: GPL-1.0+ or Artistic-1.0 Files: INSTALL LICENSE Copyright: Unknown License: Unknown Files: README lib/PerlX/Maybe.pm Copyright: This software is copyright (c) 2012-2013, 2018 by Toby Inkster. License: GPL-1.0+ or Artistic-1.0 Files: lib/Syntax/Feature/Maybe.pm Copyright: This software is copyright (c) 2012-2013 by Toby Inkster. License: GPL-1.0+ or Artistic-1.0 License: Artistic-1.0 This software is Copyright (c) 2018 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) 2018 by the copyright holder(s). This is free software, licensed under: The GNU General Public License, Version 1, February 1989 CREDITS000644001750001750 20713376512574 13413 0ustar00taitai000000000000PerlX-Maybe-1.201Maintainer: - Toby Inkster (TOBYINK) Thanks: - Darin McBride - Ivan Baidakou - Michael Jemmeson - Theo van Hoesel Changes000644001750001750 303013376512574 13703 0ustar00taitai000000000000PerlX-Maybe-1.201PerlX-Maybe =========== Created: 2012-02-15 Home page: Bug tracker: Maintainer: Toby Inkster (TOBYINK) 1.201 2018-11-25 - Improve documentation for `provided_deref`. Michael Jemmeson++ 1.200 2018-10-10 Big new features time! [ Packaging ] - Package using newer version of Dist::Inkt. - Require Scalar::Util. [ Other ] - Add `use` line to SYNOPSIS. Ivan Baidakou++ - Added: Add `provided_deref` and `provided_deref_with_maybe` functions. Theo van Hoesel++ - Progressively load exporters, choosing Exporter.pm or Exporter::Tiny as needed. 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 INSTALL000644001750001750 166513376512574 13455 0ustar00taitai000000000000PerlX-Maybe-1.201 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 LICENSE000644001750001750 4365513376512574 13456 0ustar00taitai000000000000PerlX-Maybe-1.201This software is copyright (c) 2018 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) 2018 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. 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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) 2018 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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The End MANIFEST000644001750001750 40013376512574 13517 0ustar00taitai000000000000PerlX-Maybe-1.201COPYRIGHT 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 t/04provided_deref.t t/05provided_deref_with_maybe.t META.json000644001750001750 407413376512574 14042 0ustar00taitai000000000000PerlX-Maybe-1.201{ "abstract" : "return a pair only if they are both defined", "author" : [ "Toby Inkster (TOBYINK) " ], "dynamic_config" : 0, "generated_by" : "Dist::Inkt::Profile::TOBYINK version 0.024, CPAN::Meta::Converter version 2.150010", "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" : { "Exporter::Tiny" : "0", "PerlX::Maybe::XS" : "0" }, "requires" : { "Scalar::Util" : "0", "perl" : "5.006" } }, "test" : { "requires" : { "Test::More" : "0.61" } } }, "provides" : { "PerlX::Maybe" : { "file" : "lib/PerlX/Maybe.pm", "version" : "1.201" }, "Syntax::Feature::Maybe" : { "file" : "lib/Syntax/Feature/Maybe.pm", "version" : "1.201" } }, "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" : "1.201", "x_serialization_backend" : "JSON::PP version 2.27400_02", "x_static_install" : 1 } META.yml000644001750001750 227413376512574 13672 0ustar00taitai000000000000PerlX-Maybe-1.201--- 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 0.024, CPAN::Meta::Converter version 2.150010' 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: '1.201' Syntax::Feature::Maybe: file: lib/Syntax/Feature/Maybe.pm version: '1.201' recommends: Exporter::Tiny: '0' PerlX::Maybe::XS: '0' requires: Scalar::Util: '0' 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: '1.201' x_serialization_backend: 'CPAN::Meta::YAML version 0.018' x_static_install: 1 Makefile.PL000644001750001750 1206413376512574 14411 0ustar00taitai000000000000PerlX-Maybe-1.201use 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 0.024, CPAN::Meta::Converter version 2.150010", "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 => { "Exporter::Tiny" => 0, "PerlX::Maybe::XS" => 0 }, requires => { "perl" => 5.006, "Scalar::Util" => 0 }, }, test => { requires => { "Test::More" => 0.61 } }, }, "provides" => { "PerlX::Maybe" => { file => "lib/PerlX/Maybe.pm", version => 1.201 }, "Syntax::Feature::Maybe" => { file => "lib/Syntax/Feature/Maybe.pm", version => 1.201 }, }, "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" => 1.201, "x_static_install" => 1, }; 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); README000644001750001750 1456213376512574 13324 0ustar00taitai000000000000PerlX-Maybe-1.201NAME 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: use PerlX::Maybe; 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: use PerlX::Maybe; 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. `provided_deref $condition, $r, @rest` Like `provided` but dereferences the second argument into list context: my $bob = Person->new( name => $name, address => $addr, provided length($tel), phone => $tel, provided $email =~ /\@/, email => $email, provided_deref $employee, sub { employee_id => $employee->employee_id, maybe department => $employee->department, }, unique_id => $id, ); The second argument may be a HASH or ARRAY reference. It may also be a CODE reference, which will be called in list context. If it is a blessed object, it will be treated as if it were a HASH reference (internally it could be another type of reference with overloading). A code reference can be used if evaluation of the second argument should only occur if the condition is met (e.g. to prevent method calls on an uninitialised value). This function is not exported by default. `provided_deref_with_maybe $condition, $r, @rest` Like `provide_deref` but will perform `maybe` on each key-value pair in the dereferenced values. my $bob = Person->new( name => $name, address => $addr, provided length($tel), phone => $tel, provided $email =~ /\@/, email => $email, provided_deref_with_maybe $employee, $employee, unique_id => $id, ); Also, if the second argument is a blessed object, it will also skip any 'private' attributes (keys starting with an underscore). It not only "just works", it "DWIM"s! 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. Currently there are no XS implementations of the `provided_deref` and `provided_deref_with_maybe` functions. Contributions welcome. Environment The environment variable `PERLX_MAYBE_IMPLEMENTATION` may be set to "PP" to prevent the XS backend from loading. Exporting Only `maybe` is exported by default. You can request other functions by name: use PerlX::Maybe "maybe", "provided"; Or to export everything: use PerlX::Maybe ":all"; If Exporter::Tiny is installed, you can rename imports: use PerlX::Maybe "maybe" => { -as => "perhaps" }; BUGS Please report any bugs to . SEE ALSO Syntax::Feature::Maybe, PerlX::Maybe::XS. MooseX::UndefTolerant, PerlX::Perform, Exporter. AUTHOR Toby Inkster . `provided_deref` and `provided_deref_with_maybe` by Theo van Hoesel. COPYRIGHT AND LICENCE This software is copyright (c) 2012-2013, 2018 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. SIGNATURE000644001750001750 347113376512574 13705 0ustar00taitai000000000000PerlX-Maybe-1.201This file contains message digests of all files listed in MANIFEST, signed via the Module::Signature module, version 0.81. 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 doap:Version; rdfs:label "Big new features time!"@en; dc:issued "2018-10-10"^^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:Packaging; rdfs:label "Require Scalar::Util."@en; ], [ a doap-changeset:Addition; rdfs:label "Add `provided_deref` and `provided_deref_with_maybe` functions."@en; doap-changeset:thanks [ foaf:name "Theo van Hoesel"; foaf:nick "VANHOESEL"; ]; ], [ a doap-changeset:Documentaion; rdfs:label "Add `use` line to SYNOPSIS."@en; doap-changeset:thanks [ foaf:name "Ivan Baidakou"; foaf:nick "DMOL" ]; ], [ a doap-changeset:Change; rdfs:label "Progressively load exporters, choosing Exporter.pm or Exporter::Tiny as needed."@en; ]; ]; doap:file-release ; doap:revision "1.200"^^xsd:string. a doap:Version; dc:issued "2018-11-25"^^xsd:date; doap-changeset:changeset [ doap-changeset:item [ a doap-changeset:Documentaion; rdfs:label "Improve documentation for `provided_deref`."@en; doap-changeset:thanks [ foaf:name "Michael Jemmeson"; foaf:nick "MJEMMESON"; ]; ]; ]; doap:file-release ; doap:revision "1.201"^^xsd:string. a foaf:Person; foaf:mbox ; foaf:name "Toby Inkster". 01basic.t000644001750001750 7613376512574 14231 0ustar00taitai000000000000PerlX-Maybe-1.201/tuse Test::More tests => 1; BEGIN { use_ok('PerlX::Maybe') }; 02maybe.t000644001750001750 65213376512574 14266 0ustar00taitai000000000000PerlX-Maybe-1.201/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.t000644001750001750 50313376512574 15001 0ustar00taitai000000000000PerlX-Maybe-1.201/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, ] ); 04provided_deref.t000644001750001750 310313376512574 16166 0ustar00taitai000000000000PerlX-Maybe-1.201/tuse strict; use warnings; use Test::More tests => 3; use PerlX::Maybe ':all'; is_deeply( [ provided_deref 0, { foo => 1 }, 6, provided_deref 1, { bar => 2 }, 7, provided_deref 0, { baz => 3 }, 8, provided_deref undef, { quux => 4 }, 9, provided_deref [], { quuux => 5 }, 10, provided_deref 1, { quuux => undef }, 11, ], [ 6, bar => 2, 7, 8, 9, quuux => 5, 10, quuux => undef, 11, ] ); is_deeply( [ provided_deref 0, [ 'foo' , 1 ], 6, provided_deref 1, [ 'bar' , 2 ], 7, provided_deref 0, [ 'baz' , 3 ], 8, provided_deref undef, [ 'quux' , 4 ], 9, provided_deref [], [ 'quuux', 5 ], 10, provided_deref 1, [ 'quuux', undef ], 11, ], [ 6, bar => 2, 7, 8, 9, quuux => 5, 10, quuux => undef, 11, ] ); is_deeply( [ ## provided_deref 1, \"scalar value", 1, provided_deref 1, ["foo", "bar"], 2, provided_deref 1, {"baz", "qux"}, 3, provided_deref 1, sub { die("nope") if @_; return blah => "quux" }, 4, provided_deref 1, PerlX::Maybe::Test::Hash->new( foo => 'bar' ), 5, provided_deref 1, PerlX::Maybe::Test::Hash->new( _baz => 'qux' ), 6, provided_deref 1, PerlX::Maybe::Test::Hash->new( fuz => undef ), 7 ], [ ## "scalar value", 1, "foo", "bar", 2, "baz", "qux", 3, "blah", "quux", 4, "foo", "bar", 5, "_baz", "qux", 6, "fuz", undef, 7, ], "does do dereferencing" ); package PerlX::Maybe::Test::Hash; sub new { my $class = shift; my %data = @_; bless \%data, $class; } 05provided_deref_with_maybe.t000644001750001750 337113376512574 20406 0ustar00taitai000000000000PerlX-Maybe-1.201/tuse strict; use warnings; use Test::More tests => 3; use PerlX::Maybe ':all'; is_deeply( [ provided_deref_with_maybe 0, { foo => 1 }, 6, provided_deref_with_maybe 1, { bar => 2 }, 7, provided_deref_with_maybe 0, { baz => 3 }, 8, provided_deref_with_maybe undef, { quux => 4 }, 9, provided_deref_with_maybe [], { quuux => 5 }, 10, provided_deref_with_maybe 1, { quuux => undef }, 11, ], [ 6, bar => 2, 7, 8, 9, quuux => 5, 10, 11, ] ); is_deeply( [ provided_deref_with_maybe 0, [ 'foo' , 1 ], 6, provided_deref_with_maybe 1, [ 'bar' , 2 ], 7, provided_deref_with_maybe 0, [ 'baz' , 3 ], 8, provided_deref_with_maybe undef, [ 'quux' , 4 ], 9, provided_deref_with_maybe [], [ 'quuux', 5 ], 10, provided_deref_with_maybe 1, [ 'quuux', undef ], 11, ], [ 6, bar => 2, 7, 8, 9, quuux => 5, 10, 11, ] ); is_deeply( [ ## provided_deref_with_maybe 1, \"scalar value", 1, provided_deref_with_maybe 1, ["foo", "bar"], 2, provided_deref_with_maybe 1, {"baz", "qux"}, 3, provided_deref_with_maybe 1, sub { die("nope") if @_; return blah => "quux" }, 4, provided_deref_with_maybe 1, PerlX::Maybe::Test::Hash->new( foo => 'bar' ), 5, provided_deref_with_maybe 1, PerlX::Maybe::Test::Hash->new( _baz => 'qux' ), 6, provided_deref_with_maybe 1, PerlX::Maybe::Test::Hash->new( fuz => undef ), 7 ], [ ## "scalar value", 1, "foo", "bar", 2, "baz", "qux", 3, "blah", "quux", 4, "foo", "bar", 5, 6, # skip private 7, # skip undefined ], "does do DWIM dereferencing" ); package PerlX::Maybe::Test::Hash; sub new { my $class = shift; my %data = @_; bless \%data, $class; } Maybe.pm000644001750001750 2072613376512574 15636 0ustar00taitai000000000000PerlX-Maybe-1.201/lib/PerlXuse 5.006; use strict; use warnings; package PerlX::Maybe; BEGIN { our $AUTHORITY = 'cpan:TOBYINK'; our $VERSION = '1.201'; our @EXPORT = qw/ maybe /; our @EXPORT_OK = qw/ maybe provided provided_deref provided_deref_with_maybe/; our %EXPORT_TAGS = (all => \@EXPORT_OK, default => \@EXPORT); } sub import { if (@_ == 1) { my $caller = caller; no strict 'refs'; *{"$caller\::maybe"} = \&maybe; return; } elsif (grep ref||/^-/, @_) { require Exporter::Tiny; our @ISA = qw/ Exporter::Tiny /; no warnings 'redefine'; *import = \&Exporter::Tiny::import; *unimport = \&Exporter::Tiny::unimport; goto \&Exporter::Tiny::import; } require Exporter; goto \&Exporter::import; } sub unimport { require Exporter::Tiny; our @ISA = qw/ Exporter::Tiny /; no warnings 'redefine'; *import = \&Exporter::Tiny::import; *unimport = \&Exporter::Tiny::unimport; goto \&Exporter::Tiny::unimport; } sub _croak { require Carp; goto \&Carp::croak; } 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 sub provided_deref ($$@) { unshift @_, 0; goto \&_provided_magic; } sub provided_deref_with_maybe ($$@) { unshift @_, 1; goto \&_provided_magic; } sub _provided_magic ($$$@) { my $m = shift; # maybe, clean up private keys if (shift) { my $r = shift; my $t = ref $r; _croak "Not a reference, $r" unless $t; my @vals; if ($t eq 'ARRAY') { return (@$r, @_) unless $m; @vals = @$r; } elsif ($t eq 'CODE') { return ($r->(), @_) unless $m; @vals = $r->(); } elsif ($t eq 'HASH') { return (%$r, @_) unless $m; @vals = %$r; } elsif (do { require Scalar::Util; Scalar::Util::blessed($r) }) { my %vals = eval { %$r }; _croak "Can not unwrap $r into a hash" if $@; return (%vals, @_) unless $m; delete $vals{$_} for grep /^_/, keys %vals; @vals = %vals; } else { _croak "Can not dereference, $r ... yet"; } my @return; for (my $i = 0; $i < @vals; $i+=2) { push @return, $vals[$i], $vals[$i+1] if defined $vals[$i] && defined $vals[$i+1]; } return (@return, @_); } else { (scalar @_ > 0) ? @_[1 .. $#_] : qw() } } __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: use PerlX::Maybe; 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: use PerlX::Maybe; 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<< provided_deref $condition, $r, @rest >> Like C but dereferences the second argument into list context: my $bob = Person->new( name => $name, address => $addr, provided length($tel), phone => $tel, provided $email =~ /\@/, email => $email, provided_deref $employee, sub { employee_id => $employee->employee_id, maybe department => $employee->department, }, unique_id => $id, ); The second argument may be a HASH or ARRAY reference. It may also be a CODE reference, which will be called in list context. If it is a blessed object, it will be treated as if it were a HASH reference (internally it could be another type of reference with overloading). A code reference can be used if evaluation of the second argument should only occur if the condition is met (e.g. to prevent method calls on an uninitialised value). This function is not exported by default. =item C<< provided_deref_with_maybe $condition, $r, @rest >> Like C but will perform C on each key-value pair in the dereferenced values. my $bob = Person->new( name => $name, address => $addr, provided length($tel), phone => $tel, provided $email =~ /\@/, email => $email, provided_deref_with_maybe $employee, $employee, unique_id => $id, ); Also, if the second argument is a blessed object, it will also skip any 'private' attributes (keys starting with an underscore). It not only "just works", it "DWIM"s! 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. Currently there are no XS implementations of the C and C functions. Contributions welcome. =head2 Environment The environment variable C may be set to C<< "PP" >> to prevent the XS backend from loading. =head2 Exporting Only C is exported by default. You can request other functions by name: use PerlX::Maybe "maybe", "provided"; Or to export everything: use PerlX::Maybe ":all"; If L is installed, you can rename imports: use PerlX::Maybe "maybe" => { -as => "perhaps" }; =head1 BUGS Please report any bugs to L. =head1 SEE ALSO L, L. L, L, L. =head1 AUTHOR Toby Inkster Etobyink@cpan.orgE. C and C by Theo van Hoesel. =head1 COPYRIGHT AND LICENCE This software is copyright (c) 2012-2013, 2018 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.pm000644001750001750 221413376512574 17435 0ustar00taitai000000000000PerlX-Maybe-1.201/lib/Syntax/Featureuse 5.006; use strict; use warnings; use PerlX::Maybe qw//; package Syntax::Feature::Maybe; BEGIN { our $AUTHORITY = 'cpan:TOBYINK'; our $VERSION = '1.201'; } sub install { my ($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.