UNIVERSAL-can-1.20120726/000075500000000000000000000000001204010730700142155ustar00rootroot00000000000000UNIVERSAL-can-1.20120726/Changes000064400000000000000000000050241204010730700155110ustar00rootroot00000000000000Revision history for UNIVERSAL::can 1.20120726 2012-07-25 20:52:38 America/Los_Angeles - updated to work on Perl 5.17.2+ (rjbs) 1.20110617 2011-06-17 11:45:11 America/Los_Angeles - bumped minimum Perl version to 5.8, as working around 5.6 bugs is not worth the trouble 1.20110614 2011-06-14 15:32:23 America/Los_Angeles 1.20110613 2011-06-12 18:31:27 America/Los_Angeles - fixed RT #63771, buggy triggering of overloading for blessed invocants (found and fixed by Norbert Buchmüller) - migrated to Dist::Zilla 1.16 Thu Jan 14 22:55:10 UTC 2010 - applied patch to fix deep recursion crash (RT #49580, Daniel LeWarne) 1.15 Mon Jun 22 20:39:48 UTC 2009 - moved Module::Build dependency to config_requires (RT #47165, hdp) - unified licensing between README and module (RT #46934, nhandler) 1.14 Fri Jun 12 19:43:21 UTC 2009 - released a new stable version - removed developer tests, custom M::B subclass, and passthrough Makefile.PL - added build_requires - fixed a documentation bug reported by Adam Kennedy (RT #17043) - fixed interaction with SUPER::can() (patch by Peter du Marchie van Voorthuysen in RT #25355) 1.13_001 Sat Dec 29 02:28:33 UTC 2007 - warn only when someone has overridden can() but someone else called U::c directly 1.12 Sat Apr 1 06:13:33 UTC 2006 - really made Test::Warn optional - moved developer tests to t/developer/ 1.11 Fri Feb 10 01:55:59 UTC 2006 - made can() export *optional*, as it can break things... - fixed invocant check to use existing code and avoid infinite UNIVERSAL::isa loop 1.10 Fri Feb 10 01:17:56 UTC 2006 - worked around weirdness with Test::Warn in the tests - fixed the invalid invocant bug reported by Mark Clements - fixed the tests to test for that bug too... - made the export of can() actually work - added the -always_warn flag to catch all dodgy uses of UNIVERSAL::can() 1.03 Fri Jan 13 04:46:59 UTC 2006 - mark minimum dependency on Perl 5.6 (reported by Adam Kennedy) - test for Really Bad Input (also suggested by Adam Kennedy) - fixed invalid input bugs 1.02 Wed Jan 11 00:58:57 UTC 2006 - don't eat $@ in can() (RT #17008, reported by martin at hybyte dot com) 1.01 Wed Dec 14 00:19:22 UTC 2005 - check for uninitialized invocant (patch from Stevan Little) - squelch unnecessary warnings (wow, a typo!) - added a bit more advice to the documentation 1.00 Sun Jul 3 21:38:47 UTC 2005 - First version, released on an unsuspecting world. UNIVERSAL-can-1.20120726/LICENSE000064400000000000000000000436721204010730700152360ustar00rootroot00000000000000This software is copyright (c) 2011 by chromatic@wgz.org. 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) 2011 by chromatic@wgz.org. 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, Suite 500, Boston, MA 02110-1335 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. 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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) 2011 by chromatic@wgz.org. 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 UNIVERSAL-can-1.20120726/MANIFEST000064400000000000000000000003601204010730700153450ustar00rootroot00000000000000Changes LICENSE MANIFEST META.yml Makefile.PL README dist.ini lib/UNIVERSAL/can.pm t/00-load.t t/SUPER-can.t t/always_warn.t t/bad-input.t t/bugs.t t/class.t t/deep-recursion.t t/isa-triggering-overload.t t/lib/Test/SmallWarn.pm t/object.t UNIVERSAL-can-1.20120726/META.yml000064400000000000000000000012351204010730700154670ustar00rootroot00000000000000--- abstract: 'work around buggy code calling UNIVERSAL::can() as a function' author: - chromatic build_requires: Test::More: 0 overload: 0 configure_requires: ExtUtils::MakeMaker: 6.30 dynamic_config: 0 generated_by: 'Dist::Zilla version 4.300020, CPAN::Meta::Converter version 2.120921' license: perl meta-spec: url: http://module-build.sourceforge.net/META-spec-v1.4.html version: 1.4 name: UNIVERSAL-can requires: Scalar::Util: 0 perl: 5.008 strict: 0 vars: 0 warnings: 0 warnings::register: 0 resources: homepage: https://github.com/chromatic/UNIVERSAL-can repository: https://github.com/chromatic/UNIVERSAL-can.git version: 1.20120726 UNIVERSAL-can-1.20120726/Makefile.PL000064400000000000000000000021711204010730700161700ustar00rootroot00000000000000 use strict; use warnings; use 5.008; use ExtUtils::MakeMaker 6.30; my %WriteMakefileArgs = ( "ABSTRACT" => "work around buggy code calling UNIVERSAL::can() as a function", "AUTHOR" => "chromatic", "BUILD_REQUIRES" => { "Test::More" => 0, "overload" => 0 }, "CONFIGURE_REQUIRES" => { "ExtUtils::MakeMaker" => "6.30" }, "DISTNAME" => "UNIVERSAL-can", "EXE_FILES" => [], "LICENSE" => "perl", "NAME" => "UNIVERSAL::can", "PREREQ_PM" => { "Scalar::Util" => 0, "strict" => 0, "vars" => 0, "warnings" => 0, "warnings::register" => 0 }, "VERSION" => "1.20120726", "test" => { "TESTS" => "t/*.t" } ); unless ( eval { ExtUtils::MakeMaker->VERSION(6.56) } ) { my $br = delete $WriteMakefileArgs{BUILD_REQUIRES}; my $pp = $WriteMakefileArgs{PREREQ_PM}; for my $mod ( keys %$br ) { if ( exists $pp->{$mod} ) { $pp->{$mod} = $br->{$mod} if $br->{$mod} > $pp->{$mod}; } else { $pp->{$mod} = $br->{$mod}; } } } delete $WriteMakefileArgs{CONFIGURE_REQUIRES} unless eval { ExtUtils::MakeMaker->VERSION(6.52) }; WriteMakefile(%WriteMakefileArgs); UNIVERSAL-can-1.20120726/README000064400000000000000000000004021204010730700150710ustar00rootroot00000000000000UNIVERSAL::can -------------- This module attempts to work around people calling UNIVERSAL::can() as a function, which it is not. COPYRIGHT AND LICENCE Copyright (c) 2005 - 2011, chromatic. This module is made available under the same terms as Perl 5.12. UNIVERSAL-can-1.20120726/dist.ini000064400000000000000000000015761204010730700156720ustar00rootroot00000000000000name = UNIVERSAL-can author = chromatic license = Perl_5 copyright_holder = chromatic@wgz.org copyright_year = 2011 [AutoVersion] format = {{ cldr('1.yyyyMMdd') }} [AutoPrereqs] [@Filter] -bundle = @Basic -remove = Readme [PkgVersion] [NextRelease] [@Git] changelog = Changes ; this is the default allow_dirty = dist.ini ; see Git::Check... allow_dirty = Changes ; ... and Git::Commit commit_msg = v%v%n%n%c ; see Git::Commit tag_format = %v ; see Git::Tag tag_message = %v ; see Git::Tag push_to = origin ; see Git::Push [MetaResources] homepage = https://github.com/chromatic/UNIVERSAL-can repository.url = https://github.com/chromatic/UNIVERSAL-can.git repository.web = https://github.com/chromatic/UNIVERSAL-can repository.type = git UNIVERSAL-can-1.20120726/lib/000075500000000000000000000000001204010730700147635ustar00rootroot00000000000000UNIVERSAL-can-1.20120726/lib/UNIVERSAL/000075500000000000000000000000001204010730700163335ustar00rootroot00000000000000UNIVERSAL-can-1.20120726/lib/UNIVERSAL/can.pm000064400000000000000000000103541204010730700174350ustar00rootroot00000000000000package UNIVERSAL::can; { $UNIVERSAL::can::VERSION = '1.20120726'; } # ABSTRACT: work around buggy code calling UNIVERSAL::can() as a function use strict; use warnings; use 5.008; use vars qw( $recursing $always_warn ); use Scalar::Util 'blessed'; use warnings::register; my $orig; BEGIN { $orig = \&UNIVERSAL::can; no warnings 'redefine'; *UNIVERSAL::can = \&can; } sub import { my $class = shift; for my $import (@_) { $always_warn = 1 if $import eq '-always_warn'; no strict 'refs'; *{ caller() . '::can' } = \&can if $import eq 'can'; } } sub can { my $caller = caller(); local $@; # don't get into a loop here goto &$orig if $recursing || ( defined $caller && defined $_[0] && eval { local $recursing = 1; $caller->isa(blessed $_[0] || $_[0]) } ); # call an overridden can() if it exists my $can = eval { $_[0]->$orig('can') || 0 }; # but only if it's a real class goto &$orig unless $can; # but not if it inherited this one goto &$orig if $can == \&UNIVERSAL::can; # redirect to an overridden can, making sure not to recurse and warning local $recursing = 1; my $invocant = shift; _report_warning(); return $invocant->can(@_); } sub _report_warning { if ( $always_warn || warnings::enabled() ) { my $calling_sub = ( caller(2) )[3] || ''; warnings::warn("Called UNIVERSAL::can() as a function, not a method") if $calling_sub !~ /::can$/; } return; } 1; __END__ =head1 NAME UNIVERSAL::can - work around buggy code calling UNIVERSAL::can() as a function =head1 SYNOPSIS To use this module, simply: use UNIVERSAL::can; =head1 DESCRIPTION The UNIVERSAL class provides a few default methods so that all objects can use them. Object orientation allows programmers to override these methods in subclasses to provide more specific and appropriate behavior. Some authors call methods in the UNIVERSAL class on potential invocants as functions, bypassing any possible overriding. This is wrong and you should not do it. Unfortunately, not everyone heeds this warning and their bad code can break your good code. This module replaces C with a method that checks to see if the first argument is a valid invocant has its own C method. If so, it gives a warning and calls the overridden method, working around buggy code. Otherwise, everything works as you might expect. Some people argue that you must call C as a function because you don't know if your proposed invocant is a valid invocant. That's silly. Use C from L if you want to check that the potential invocant is an object or call the method anyway in an C block and check for failure (though check the exception I, as a poorly-written C method could break Liskov and throw an exception other than "You can't call a method on this type of invocant"). Just don't break working code. =head1 AUTHOR chromatic, C<< >> =head1 BUGS Please report any bugs or feature requests to C, or through the web interface at L. This will contact me, hold onto patches so I don't drop them, and will notify you of progress on your request as I make changes. =head1 ACKNOWLEDGEMENTS Inspired by L by Yuval Kogman, Autrijus Tang, and myself. Adam Kennedy has tirelessly made me tired by reporting potential bugs and suggesting ideas that found actual bugs. Mark Clements helped to track down an invalid invocant bug. Curtis "Ovid" Poe finally provided the inspiration I needed to clean up the interface. Peter du Marchie van Voorthuysen identified and fixed a problem with calling C. Daniel LeWarne found and fixed a deep recursion error. Norbert Buchmüller fixed an overloading bug in blessed invocants. The Perl QA list had a huge... discussion... which inspired my realization that this module needed to do what it does now. =head1 COPYRIGHT & LICENSE Copyright (c) 2005 - 2011, chromatic. This module is made available under the same terms as Perl 5.12. =cut UNIVERSAL-can-1.20120726/t/000075500000000000000000000000001204010730700144605ustar00rootroot00000000000000UNIVERSAL-can-1.20120726/t/00-load.t000064400000000000000000000005041204010730700160000ustar00rootroot00000000000000use Test::More tests => 3; use_ok( 'UNIVERSAL::can' ); diag( "Testing UNIVERSAL::can $UNIVERSAL::can::VERSION, Perl $], $^X" ); ok( ! defined &main::can, 'UNIVERSAL::can() should not export can()' ); package not_main; use UNIVERSAL::can 'can'; ::ok( defined ¬_main::can, '.. but should export it when requested' ); UNIVERSAL-can-1.20120726/t/SUPER-can.t000064400000000000000000000010411204010730700162760ustar00rootroot00000000000000use UNIVERSAL::can; use strict; use warnings; package MyClass; my @caller; sub can { push @caller, caller; } sub test { my ($invocant, $method) = @_; $invocant->SUPER::can($method); } package main; use Test::More tests => 2; my @warning; local $SIG{__WARN__} = sub { push @warning, @_ }; MyClass->test("foo"); is_deeply(\@warning, [], "CLASS->SUPER::can(METHOD) does not give a warning"); is_deeply(\@caller, [], "CLASS->SUPER::can(METHOD) does not invoke CLASS->can(METHOD)"); UNIVERSAL-can-1.20120726/t/always_warn.t000064400000000000000000000010111204010730700171650ustar00rootroot00000000000000#!perl use strict; use warnings; use lib 't/lib'; use Test::More tests => 2; use Test::SmallWarn; # must happen here to register warnings category BEGIN { use_ok( 'UNIVERSAL::can', '-always_warn' ) }; { package Demo; sub new { bless {}, shift } sub can { my ($self, $method) = @_; return $self->SUPER::can( $method ); } } my $demo = Demo->new( 'Demo' ); { no warnings; warning_like { UNIVERSAL::can( $demo, 'new' ) } qr/Called UNIVERSAL::can/, '-always_warn flag should make module always warn'; } UNIVERSAL-can-1.20120726/t/bad-input.t000064400000000000000000000035171204010730700165360ustar00rootroot00000000000000#!perl package test; use strict; use warnings; use lib 't/lib'; # add all sorts of bad input that might get crazy results my @inputs; BEGIN { @inputs = ( undef, '', \'', {}, [], 0, sub {}, do { local *FH; *FH }, -1, 0.003, '.' ); } # don't hardcode the test number, but do check for premature death use Test::More tests => ( @inputs * 2 ) + 1; # enable lexical warnings from module at compile time BEGIN { use_ok( 'UNIVERSAL::can' ) } =pod This test is for the issue discussed in the PM post: http://www.perlmonks.org/index.pl?node_id=516372 The errors which were reported were: Use of uninitialized value in split at /usr/local/share/perl/5.8.4/UNIVERSAL/can.pm line 51. Called UNIVERSAL::can() as a function, not a method at /usr/local/share/perl/5.8.4/Class/DBI.pm line 265 Can't call method "can" on an undefined value at /usr/local/share/perl/5.8.4/UNIVERSAL/can.pm line 40. Class::DBI line 265 is: 255 > my @pk_values = $self->_attrs($self->primary_columns); 265 > UNIVERSAL::can($_ => 'id') and $_ = $_->id for @pk_values; In all likeliness Class::DBI line 265 really should be: eval { $_->can( $_ => 'id') } and $_ = $_->id for grep { defined $_ } @pk_values; or something similar to prevent sending an undefined value to UNIVERSAL::can. However, in the interest of making this module as useful as possible, it should check for bad input and DWIM in those cases. =cut # this is a little ugly because nesting the warning test within the exception # test didn't do The Right Thing for my $bad ( @inputs ) { my $bad_name = defined $bad ? $bad : '(undef)'; my $warnings = ''; local $SIG{__WARN__} = sub { $warnings = shift }; ok( ! UNIVERSAL::can( $bad, 'id' ), "$bad_name should be false" ); is( $warnings, '', '... and not throw a warning' ); } UNIVERSAL-can-1.20120726/t/bugs.t000064400000000000000000000010411204010730700156010ustar00rootroot00000000000000#!/usr/bin/perl use strict; use Test::More 'no_plan'; # tests => 8; BEGIN { use_ok( 'UNIVERSAL::can', 'can' ) } # valid use of isa() as static method on undefined class { my $warnings = ''; local $SIG{__WARN__} = sub { $warnings .= shift }; use warnings 'UNIVERSAL::can'; { local $TODO = "UnloadedClass->can('can') fails until 5.17.2" if $] < 5.017002; ok( UnloadedClass->can('can'), 'unloaded class should be able to can()' ); } is( $warnings, '', '... and should not warn' ); } UNIVERSAL-can-1.20120726/t/class.t000064400000000000000000000057511204010730700157620ustar00rootroot00000000000000#!perl use strict; use warnings; use lib 't/lib'; use Test::More tests => 16; use Test::SmallWarn; # must happen here to register warnings category BEGIN { use_ok( 'UNIVERSAL::can' ) }; { package Logger; use Scalar::Util 'blessed'; use vars '$AUTOLOAD'; sub new { my ($class, $object) = @_; bless { object => $object, calls => [] }, $class; } sub object { my $self = shift; return $self->{object} if blessed( $self ); return $self; } sub calls { my $self = shift; return $self->{calls}; } sub can { my ($self, $name) = @_; my $object = $self->object(); return $self->SUPER::can( $name ) if $object->isa( __PACKAGE__ ); my $wrapped_method = $self->object->can( $name ); } sub DESTROY {} sub AUTOLOAD { my $self = shift; my ($method) = $AUTOLOAD =~ /::(\w+)$/; return unless my $coderef = $self->object->can( $method ); push @{ $self->calls() }, $method; $self->object->$coderef( @_ ); } package Logged; sub new { my $class = shift; bless \$class, $class; } sub foo { my $self = shift; return 'foo'; } package Liar; use vars '$AUTOLOAD'; sub can { my $self = shift; return Logger->can( shift ); } sub DESTROY {} sub AUTOLOAD { my $self = shift; my ($method) = $AUTOLOAD =~ /::(\w+)$/; return Logger->$method( @_ ); } } my $logger = Logger->new( 'Logged' ); my $can_new = $logger->can( 'new' ); my $can_foo = $logger->can( 'foo' ); ok( defined $can_new, 'can() should return true for defined class methods' ); ok( defined &$can_new, '... returning a code reference' ); is( $can_foo, \&Logged::foo, '... the correct code reference' ); my $uncan_foo; warning_like { $uncan_foo = UNIVERSAL::can( $logger, 'foo' ) } qr/Called UNIVERSAL::can\(\) as a function, not a method at t.class.t/, 'calling UNIVERSAL::can() as function on invocant should warn'; ok( defined $uncan_foo, 'UNIVERSAL::can() should return true then too' ); ok( defined &$uncan_foo, '... returning a code reference' ); is( $uncan_foo, \&Logged::foo, '... the correct code reference' ); my $can_calls = Logger->can( 'calls' ); ok( defined $can_calls, 'can() should return true for methods called as class methods' ); my $can_falls = Logger->can( 'falls' ); ok( ! defined $can_falls, '... and false for nonexistant methods' ); my $uncan_liar; warning_like { $uncan_liar = UNIVERSAL::can( 'Liar', 'new' ) } qr/Called UNIVERSAL::can\(\) as a function, not a method at t.class.t/, 'calling UNIVERSAL::can() as function on class name invocant should warn'; { no warnings; warnings_are { $uncan_liar = UNIVERSAL::can( 'Liar', 'new' ) } [], '... but only with warnings enabled'; } { no warnings 'UNIVERSAL::can'; warnings_are { $uncan_liar = UNIVERSAL::can( 'Liar', 'new' ) } [], '... and not with warnings diabled for UNIVERSAL::can'; } ok( defined $uncan_liar, 'can() should return true for class can() method' ); ok( defined &$uncan_liar, '... returning a code reference' ); is( $uncan_liar, \&Logger::new, '... the correct code reference' ); UNIVERSAL-can-1.20120726/t/deep-recursion.t000064400000000000000000000006211204010730700175700ustar00rootroot00000000000000#! perl # tests from RT #49580, where calling ->isa() may recurse into ->can() package Test::Overloaded::String; use strict; use warnings; use overload '""' => sub { $_[0]->can('bar') }; sub new { bless {}, shift } sub bar {1} 1; package main; use strict; use warnings; use Test::More tests => 1; use UNIVERSAL::can; my $foo = Test::Overloaded::String->new; ok( "$foo", "Didn't segfault" ); UNIVERSAL-can-1.20120726/t/isa-triggering-overload.t000064400000000000000000000012761204010730700213770ustar00rootroot00000000000000#! perl { package Test::Overloaded::String; use vars qw( $called_string_overload ); use strict; use warnings; use overload '""' => sub { $called_string_overload++ }; sub new { bless {}, shift } sub foo { } } package main; use strict; use warnings; use Test::More tests => 3; use UNIVERSAL::can; ok( eval { Test::Overloaded::String->new->can('foo') }, "->can should return true for an existing method" ); ok( !eval { Test::Overloaded::String->new->can('bar') }, "->can should return false for a non-existent method" ); ok( !$Test::Overloaded::String::called_string_overload, "it should not trigger the string overload on the invocant in either case" ); UNIVERSAL-can-1.20120726/t/lib/000075500000000000000000000000001204010730700152265ustar00rootroot00000000000000UNIVERSAL-can-1.20120726/t/lib/Test/000075500000000000000000000000001204010730700161455ustar00rootroot00000000000000UNIVERSAL-can-1.20120726/t/lib/Test/SmallWarn.pm000064400000000000000000000012031204010730700203770ustar00rootroot00000000000000package Test::SmallWarn; use strict; use warnings; use Test::More; sub import { my $caller = caller(); no strict 'refs'; *{ $caller . '::warning_like' } = \&warning_like; *{ $caller . '::warnings_are' } = \&warnings_are; } sub warning_like (&$;$) { my ($code, $regex, $description) = @_; my $warning = '' ; local $SIG{__WARN__} = sub { $warning .= shift }; $code->(); like( $warning, $regex, $description ); } sub warnings_are (&$;$) { my ($code, $expected, $description) = @_; my @warnings; local $SIG{__WARN__} = sub { push @warnings, shift }; $code->(); is( "@warnings", "@$expected", $description ); } 1; UNIVERSAL-can-1.20120726/t/object.t000064400000000000000000000024601204010730700161150ustar00rootroot00000000000000#!perl use strict; use warnings; use Test::More tests => 6; # enable lexical warnings from module at compile time BEGIN { use_ok( 'UNIVERSAL::can' ) } { package Foo; use vars '$AUTOLOAD'; use Scalar::Util 'blessed'; sub new { my ($class, %args) = @_; while (my ($name, $value) = each %args) { $args{$name} = sub { return $value }; } bless \%args, $class; } sub can { my ($self, $name) = @_; return $self->SUPER::can( $name ) unless blessed( $self ); return $self->{$name} if exists $self->{$name}; return $self->SUPER::can( $name ); } sub DESTROY {} sub AUTOLOAD { my $self = shift; my ($method) = $AUTOLOAD =~ /::(\w+)$/; return unless exists $self->{$method}; return $self->{$method}->( @_ ); } } my $foo = Foo->new( foo => 'it is foo', bar => 'it is not foo' ); my ($can_foo, $can_baz); eval { die "Failure\n" }; { no warnings 'UNIVERSAL::can'; $can_foo = UNIVERSAL::can( $foo, 'foo' ); $can_baz = UNIVERSAL::can( $foo, 'baz' ); } ok( defined $can_foo, 'UNIVERSAL::can() should return a true value, if possible' ); ok( defined &$can_foo, '... a code ref, if possible' ); ok( ! defined $can_baz, '... or undef if not' ); is( $can_foo->(), 'it is foo', '... the proper code ref' ); is( $@, "Failure\n", '... not eating any exceptions already thrown' );