File perl-constant-defer.spec of Package perl-constant-defer

#
# spec file for package perl-constant-defer
#
# Copyright (c) 2014 SUSE LINUX Products GmbH, Nuernberg, Germany.
#
# All modifications and additions to the file contributed by third parties
# remain the property of their copyright owners, unless otherwise agreed
# upon. The license for this file, and modifications and additions to the
# file, is the same license as for the pristine package itself (unless the
# license for the pristine package is not an Open Source License, in which
# case the license is the MIT License). An "Open Source License" is a
# license that conforms to the Open Source Definition (Version 1.9)
# published by the Open Source Initiative.

# Please submit bugfixes or comments via http://bugs.opensuse.org/
#


Name:           perl-constant-defer
Version:        5
Release:        0
%define cpan_name constant-defer
Summary:        Constant subs with deferred value calculation.
License:        GPL-3.0+
Group:          Development/Libraries/Perl
Url:            http://search.cpan.org/dist/constant-defer/
Source:         http://www.cpan.org/authors/id/K/KR/KRYDE/%{cpan_name}-%{version}.tar.gz
BuildArch:      noarch
BuildRoot:      %{_tmppath}/%{name}-%{version}-build
BuildRequires:  perl
BuildRequires:  perl-macros
BuildRequires:  perl(ExtUtils::MakeMaker)
BuildRequires:  perl(Test)
BuildRequires:  perl(vars)
Requires:       perl(Test)
Requires:       perl(vars)
%{perl_requires}

%description
'constant::defer' creates a subroutine which on the first call runs given
code to calculate its value, and on the second and subsequent calls just
returns that value, like a constant. The value code is discarded once run,
allowing it to be garbage collected.

Deferring a calculation is good if it might take a lot of work or produce a
big result, but is only needed sometimes or only well into a program run.
If it's never needed then the value code never runs.

A deferred constant is generally not inlined or folded (see the
perlop/Constant Folding manpage) like a plain 'constant' since it's not a
single scalar value. In the current implementation a deferred constant
becomes a plain one after the first use, so may inline etc in code compiled
after that (see the /IMPLEMENTATION manpage below).

%prep
%setup -q -n %{cpan_name}-%{version}

%build
%{__perl} Makefile.PL INSTALLDIRS=vendor
%{__make} %{?_smp_mflags}

%check
%{__make} test

%install
%perl_make_install
%perl_process_packlist
%perl_gen_filelist

%clean
%{__rm} -rf %{buildroot}

%files -f %{name}.files
%defattr(-,root,root,755)
%doc Changes COPYING README examples

%changelog