forked from pool/perl-Safe-Isa
93 lines
2.8 KiB
RPMSpec
93 lines
2.8 KiB
RPMSpec
#
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# spec file for package perl-Safe-Isa
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#
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# Copyright (c) 2018 SUSE LINUX GmbH, Nuernberg, Germany.
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#
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# All modifications and additions to the file contributed by third parties
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# remain the property of their copyright owners, unless otherwise agreed
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# upon. The license for this file, and modifications and additions to the
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# file, is the same license as for the pristine package itself (unless the
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# license for the pristine package is not an Open Source License, in which
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# case the license is the MIT License). An "Open Source License" is a
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# license that conforms to the Open Source Definition (Version 1.9)
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# published by the Open Source Initiative.
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# Please submit bugfixes or comments via http://bugs.opensuse.org/
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#
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Name: perl-Safe-Isa
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Version: 1.000010
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Release: 0
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%define cpan_name Safe-Isa
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Summary: Call isa, can, does and DOES safely on things that may not be objects
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License: Artistic-1.0 OR GPL-1.0-or-later
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Group: Development/Libraries/Perl
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Url: http://search.cpan.org/dist/Safe-Isa/
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Source0: https://cpan.metacpan.org/authors/id/E/ET/ETHER/%{cpan_name}-%{version}.tar.gz
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Source1: cpanspec.yml
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Source100: README.md
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BuildArch: noarch
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BuildRoot: %{_tmppath}/%{name}-%{version}-build
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BuildRequires: perl
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BuildRequires: perl-macros
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%{perl_requires}
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%description
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How many times have you found yourself writing:
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if ($obj->isa('Something')) {
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and then shortly afterwards cursing and changing it to:
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if (Scalar::Util::blessed($obj) and $obj->isa('Something')) {
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Right. That's why this module exists.
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Since perl allows us to provide a subroutine reference or a method name to
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the -> operator when used as a method call, and a subroutine doesn't
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require the invocant to actually be an object, we can create safe versions
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of isa, can and friends by using a subroutine reference that only tries to
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call the method if it's used on an object. So:
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my $isa_Foo = $maybe_an_object->$_call_if_object(isa => 'Foo');
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is equivalent to
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my $isa_Foo = do {
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if (Scalar::Util::blessed($maybe_an_object)) {
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$maybe_an_object->isa('Foo');
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} else {
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undef;
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}
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};
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Note that we don't handle trying class names, because many things are valid
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class names that you might not want to treat as one (like say "Matt") - the
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'is_module_name' function from Module::Runtime is a good way to check for
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something you might be able to call methods on if you want to do that.
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We are careful to make sure that scalar/list context is preserved for the
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method that is eventually called.
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%prep
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%setup -q -n %{cpan_name}-%{version}
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%build
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%{__perl} Makefile.PL INSTALLDIRS=vendor
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%{__make} %{?_smp_mflags}
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%check
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%{__make} test
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%install
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%perl_make_install
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%perl_process_packlist
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%perl_gen_filelist
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%files -f %{name}.files
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%defattr(-,root,root,755)
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%doc Changes README
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%changelog
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