X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=docs%2Fusers_guide%2Fglasgow_exts.xml;h=d23da182cdc59426f858f42662e5e9c687fa26cb;hp=31206017e7b76cc6b7ff0fa4b12e0de7fee36ddf;hb=6e0f552430600d95768c1668b6d458c71a52f2d4;hpb=5eb2190d2aebc6e1a11780a43d31cbc7e831dd78

diff --git a/docs/users_guide/glasgow_exts.xml b/docs/users_guide/glasgow_exts.xml
index 3120601..d23da18 100644
--- a/docs/users_guide/glasgow_exts.xml
+++ b/docs/users_guide/glasgow_exts.xml
@@ -2353,6 +2353,16 @@ otherwise is a <emphasis>generalised</emphasis> data type (<xref linkend="gadt"/
 </para></listitem>
 
 <listitem><para>
+As with other type signatures, you can give a single signature for several data constructors.
+In this example we give a single signature for <literal>T1</literal> and <literal>T2</literal>:
+<programlisting>
+  data T a where
+    T1,T2 :: a -> T a
+    T3 :: T a
+</programlisting>
+</para></listitem>
+
+<listitem><para>
 The type signature of
 each constructor is independent, and is implicitly universally quantified as usual. 
 Different constructors may have different universally-quantified type variables