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authorAndreas Klebinger <klebinger.andreas@gmx.at>2019-07-30 17:46:41 +0200
committerMarge Bot <ben+marge-bot@smart-cactus.org>2019-08-02 08:14:10 -0400
commit9552114006ea81e379228706caf30cbe3323e1d2 (patch)
treecee4a1aba3e50f1f5425fcb5f7e78b081f57fc47
parent986643cb3506f2eedce96bf2d2c03873f105fad5 (diff)
downloadhaskell-9552114006ea81e379228706caf30cbe3323e1d2.tar.gz
Add StandaloneDeriving example for DerivingVia.
[skip-ci]
-rw-r--r--docs/users_guide/glasgow_exts.rst6
1 files changed, 6 insertions, 0 deletions
diff --git a/docs/users_guide/glasgow_exts.rst b/docs/users_guide/glasgow_exts.rst
index 570548095b..c46812baeb 100644
--- a/docs/users_guide/glasgow_exts.rst
+++ b/docs/users_guide/glasgow_exts.rst
@@ -5422,6 +5422,12 @@ as in the following example: ::
Here we make use of the ``Monoid ((->) a)`` instance.
+When used in combination with :extension:`StandaloneDeriving` we swap the order
+for the instance we base our derivation on and the instance we define e.g.: ::
+
+ deriving via (a -> App m b) instance Monoid (Kleisli m a b)
+
+
.. _pattern-synonyms:
Pattern synonyms