From mboxrd@z Thu Jan  1 00:00:00 1970
From: ericbavier@openmailbox.org
Subject: Re: [PATCH] gnu: Add ghc-semigroupoids.
Date: Thu, 22 Oct 2015 03:47:42 -0500
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To: guix-devel@gnu.org, Paul van der Walt <paul@denknerd.org>

From: Eric Bavier <ericbavier@openmailbox.org>

> * gnu/packages/haskell.scm (ghc-semigroupoids): New variable.
> ---
>  gnu/packages/haskell.scm | 39 +++++++++++++++++++++++++++++++++++++++
>  1 file changed, 39 insertions(+)
> 
> diff --git a/gnu/packages/haskell.scm b/gnu/packages/haskell.scm
> index 9b1c4cb..c6b092b 100644
> --- a/gnu/packages/haskell.scm
> +++ b/gnu/packages/haskell.scm
> @@ -3087,6 +3087,45 @@ are implemented as FFI bindings to efficient code from zlib.")
>      (description "This package provides bifunctors for Haskell.")
>      (license bsd-3)))
>  
> +(define-public ghc-semigroupoids
> +  (package
> +    (name "ghc-semigroupoids")
> +    (version "5.0.0.4")
> +    (source
> +     (origin
> +       (method url-fetch)
> +       (uri (string-append
> +             "http://hackage.haskell.org/package/semigroupoids/semigroupoids-"
> +             version
> +             ".tar.gz"))
> +       (sha256
> +        (base32
> +         "1jf7jnfhdvl6p18wdr21yi2fim1xb8alcn6szhrdswj0dkilgq6d"))))
> +    (build-system haskell-build-system)
> +    (propagated-inputs
> +     `(("ghc-base-orphans" ,ghc-base-orphans)
> +       ("ghc-transformers-compat" ,ghc-transformers-compat)
> +       ("ghc-bifunctors" ,ghc-bifunctors)
> +       ("ghc-comonad" ,ghc-comonad)
> +       ("ghc-contravariant" ,ghc-contravariant)
> +       ("ghc-distributive" ,ghc-distributive)))
> +    (arguments `(#:tests? #f)) ; FIXME: test framework unavailable
> +    (inputs
> +     `(("ghc-semigroups" ,ghc-semigroups)
> +       ("ghc-tagged" ,ghc-tagged)
> +       ("ghc-doctest" ,ghc-doctest)))
> +    (home-page "http://github.com/ekmett/semigroupoids")
> +    (synopsis "Semigroupoids: Category sans id")

How about: "Semigroupoid operations for Haskell"

`~Eric

> +    (description "This library provides a wide array of (semi)groupoids and
> +operations for working with them.  A @code{Semigroupoid} is a @code{Category}
> +without the requirement of identity arrows for every object in the category.
> +A @code{Category} is any @code{Semigroupoid} for which the Yoneda lemma holds.
> +Finally, to work with these weaker structures it is beneficial to have
> +containers that can provide stronger guarantees about their contents, so
> +versions of @code{Traversable} and @code{Foldable} that can be folded with
> +just a @code{Semigroup} are added.")
> +    (license bsd-3)))
> +
>  (define-public ghc-contravariant
>    (package
>      (name "ghc-contravariant")
> -- 
> 2.5.0
>