File ghc-ghc-typelits-natnormalise.spec of Package ghc-ghc-typelits-natnormalise

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File ghc-ghc-typelits-natnormalise.spec of Package ghc-ghc-typelits-natnormalise

#
# spec file for package ghc-ghc-typelits-natnormalise
#
# Copyright (c) 2017 SUSE LINUX 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/
#

%global pkg_name ghc-typelits-natnormalise
%bcond_with tests
Name:           ghc-%{pkg_name}
Version:        0.5.3
Release:        0
Summary:        GHC typechecker plugin for types of kind GHC.TypeLits.Nat
License:        BSD-2-Clause
Group:          Development/Libraries/Haskell
URL:            https://hackage.haskell.org/package/%{pkg_name}
Source0:        https://hackage.haskell.org/package/%{pkg_name}-%{version}/%{pkg_name}-%{version}.tar.gz
BuildRequires:  ghc-Cabal-devel
BuildRequires:  ghc-ghc-devel
BuildRequires:  ghc-ghc-tcplugins-extra-devel
BuildRequires:  ghc-rpm-macros
%if %{with tests}
BuildRequires:  ghc-tasty-devel
BuildRequires:  ghc-tasty-hunit-devel
BuildRequires:  ghc-template-haskell-devel
%endif

%description
A type checker plugin for GHC that can solve /equalities/ of types of kind
'Nat', where these types are either:

* Type-level naturals

* Type variables

* Applications of the arithmetic expressions '(+,-,*,^)'.

It solves these equalities by normalising them to /sort-of/ 'SOP'
(Sum-of-Products) form, and then perform a simple syntactic equality.

For example, this solver can prove the equality between:

' (x + 2)^(y + 2) '

and

' 4*x*(2 + x)^y + 4*(2 + x)^y + (2 + x)^y*x^2 '

Because the latter is actually the 'SOP' normal form of the former.

To use the plugin, add the

' OPTIONS_GHC -fplugin GHC.TypeLits.Normalise '

Pragma to the header of your file.

%package devel
Summary:        Haskell %{pkg_name} library development files
Group:          Development/Libraries/Haskell
Requires:       %{name} = %{version}-%{release}
Requires:       ghc-compiler = %{ghc_version}
Requires(post): ghc-compiler = %{ghc_version}
Requires(postun): ghc-compiler = %{ghc_version}

%description devel
This package provides the Haskell %{pkg_name} library
development files.

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

%build
%ghc_lib_build

%install
%ghc_lib_install

%check
%cabal_test

%post devel
%ghc_pkg_recache

%postun devel
%ghc_pkg_recache

%files -f %{name}.files
%doc LICENSE

%files devel -f %{name}-devel.files
%doc CHANGELOG.md README.md

%changelog

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File ghc-ghc-typelits-natnormalise.spec of Package ghc-ghc-typelits-natnormalise

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