From 8376ef56580626e9c0f796d5b85b53a0a1c7d5f5 Mon Sep 17 00:00:00 2001 From: V3n3RiX Date: Sat, 14 Jul 2018 21:03:06 +0100 Subject: gentoo resync : 14.07.2018 --- dev-haskell/stmonadtrans/metadata.xml | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) create mode 100644 dev-haskell/stmonadtrans/metadata.xml (limited to 'dev-haskell/stmonadtrans/metadata.xml') diff --git a/dev-haskell/stmonadtrans/metadata.xml b/dev-haskell/stmonadtrans/metadata.xml new file mode 100644 index 000000000000..f224e9002210 --- /dev/null +++ b/dev-haskell/stmonadtrans/metadata.xml @@ -0,0 +1,17 @@ + + + + + haskell@gentoo.org + Gentoo Haskell + + + A monad transformer version of the ST monad + Warning! This monad transformer should not be used with monads that + can contain multiple answers, like the list monad. The reason is that + the will be duplicated across the different answers and this cause + Bad Things to happen (such as loss of referential transparency). Safe + monads include the monads State, Reader, Writer, Maybe and + combinations of their corresponding monad transformers. + + -- cgit v1.2.3