SPELL=haskell-semigroups
         VERSION=0.19
          SOURCE="semigroups-${VERSION}.tar.gz"
   SOURCE_URL[0]=https://hackage.haskell.org/package/semigroups-${VERSION}/${SOURCE}
     SOURCE_HASH=sha512:bb254416171f729686a884615043f52fb26ab83f1ba8f3d5b5cac5f60ceef08a755ad61c7247498436c47fc42a972aa6461cad156f32fc281cfd66bf7570a469
SOURCE_DIRECTORY="${BUILD_DIRECTORY}/semigroups-${VERSION}"
        WEB_SITE="http://github.com/ekmett/semigroups/"
      LICENSE[0]=BSD
         ENTERED=20150802
           SHORT="anything that associates"
cat << EOF
In mathematics, a semigroup is an algebraic structure consisting of a set
together with an associative binary operation. A semigroup generalizes a monoid
in that there might not exist an identity element. It also (originally)
generalized a group (a monoid with all inverses) to a type where every
element did not have to have an inverse, thus the name semigroup.
EOF