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SPELL=haskellsemigroups
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
