Ondřej Súkup
b2e881cd5d
OBS-URL: https://build.opensuse.org/package/show/devel:languages:haskell/ghc-random?expand=0&rev=57
133 lines
4.4 KiB
RPMSpec
133 lines
4.4 KiB
RPMSpec
#
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# spec file for package ghc-random
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#
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# Copyright (c) 2021 SUSE LLC
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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 https://bugs.opensuse.org/
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#
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%global pkg_name random
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%bcond_with tests
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Name: ghc-%{pkg_name}
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Version: 1.2.0
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Release: 0
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Summary: Pseudo-random number generation
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License: BSD-3-Clause
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URL: https://hackage.haskell.org/package/%{pkg_name}
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Source0: https://hackage.haskell.org/package/%{pkg_name}-%{version}/%{pkg_name}-%{version}.tar.gz
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Source1: https://hackage.haskell.org/package/%{pkg_name}-%{version}/revision/6.cabal#/%{pkg_name}.cabal
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BuildRequires: ghc-Cabal-devel
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BuildRequires: ghc-bytestring-devel
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BuildRequires: ghc-deepseq-devel
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BuildRequires: ghc-mtl-devel
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BuildRequires: ghc-rpm-macros
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BuildRequires: ghc-splitmix-devel
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ExcludeArch: %{ix86}
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%if %{with tests}
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BuildRequires: ghc-containers-devel
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BuildRequires: ghc-doctest-devel
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BuildRequires: ghc-mwc-random-devel
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BuildRequires: ghc-primitive-devel
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BuildRequires: ghc-smallcheck-devel
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BuildRequires: ghc-tasty-devel
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BuildRequires: ghc-tasty-expected-failure-devel
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BuildRequires: ghc-tasty-hunit-devel
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BuildRequires: ghc-tasty-smallcheck-devel
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BuildRequires: ghc-unliftio-devel
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BuildRequires: ghc-vector-devel
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%endif
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%description
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This package provides basic pseudo-random number generation, including the
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ability to split random number generators.
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== "System.Random": pure pseudo-random number interface
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In pure code, use 'System.Random.uniform' and 'System.Random.uniformR' from
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"System.Random" to generate pseudo-random numbers with a pure pseudo-random
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number generator like 'System.Random.StdGen'.
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As an example, here is how you can simulate rolls of a six-sided die using
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'System.Random.uniformR':
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>>> let roll = uniformR (1, 6) :: RandomGen g => g -> (Word, g) >>> let rolls =
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unfoldr (Just . roll) :: RandomGen g => g -> [Word] >>> let pureGen = mkStdGen
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42 >>> take 10 (rolls pureGen) :: [Word] [1,1,3,2,4,5,3,4,6,2]
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See "System.Random" for more details.
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== "System.Random.Stateful": monadic pseudo-random number interface
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In monadic code, use 'System.Random.Stateful.uniformM' and
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'System.Random.Stateful.uniformRM' from "System.Random.Stateful" to generate
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pseudo-random numbers with a monadic pseudo-random number generator, or using a
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monadic adapter.
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As an example, here is how you can simulate rolls of a six-sided die using
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'System.Random.Stateful.uniformRM':
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>>> let rollM = uniformRM (1, 6) :: StatefulGen g m => g -> m Word >>> let
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pureGen = mkStdGen 42 >>> runStateGen_ pureGen (replicateM 10 . rollM) ::
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[Word] [1,1,3,2,4,5,3,4,6,2]
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The monadic adapter 'System.Random.Stateful.runGenState_' is used here to lift
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the pure pseudo-random number generator 'pureGen' into the
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'System.Random.Stateful.StatefulGen' context.
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The monadic interface can also be used with existing monadic pseudo-random
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number generators. In this example, we use the one provided in the
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<https://hackage.haskell.org/package/mwc-random mwc-random> package:
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>>> import System.Random.MWC as MWC >>> let rollM = uniformRM (1, 6) ::
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StatefulGen g m => g -> m Word >>> monadicGen <- MWC.create >>> replicateM 10
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(rollM monadicGen) :: IO [Word] [2,3,6,6,4,4,3,1,5,4]
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See "System.Random.Stateful" for more details.
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%package devel
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Summary: Haskell %{pkg_name} library development files
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Requires: %{name} = %{version}-%{release}
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Requires: ghc-compiler = %{ghc_version}
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Requires(post): ghc-compiler = %{ghc_version}
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Requires(postun): ghc-compiler = %{ghc_version}
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%description devel
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This package provides the Haskell %{pkg_name} library development files.
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%prep
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%autosetup -n %{pkg_name}-%{version}
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cp -p %{SOURCE1} %{pkg_name}.cabal
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%build
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%ghc_lib_build
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%install
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%ghc_lib_install
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%check
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%cabal_test
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%post devel
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%ghc_pkg_recache
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%postun devel
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%ghc_pkg_recache
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%files -f %{name}.files
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%license LICENSE
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%files devel -f %{name}-devel.files
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%doc CHANGELOG.md README.md
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%changelog
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