[commit: ghc] master: users_guide: note -XPatternSynonyms is required for use sites (b059dcc)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/b059dcc81e9c4097b5f04f85e1ac33586c494110/ghc

>---------------------------------------------------------------

commit b059dcc81e9c4097b5f04f85e1ac33586c494110
Author: Austin Seipp <austin at well-typed.com>
Date:   Mon Apr 7 10:15:05 2014 -0500

    users_guide: note -XPatternSynonyms is required for use sites
    
    Signed-off-by: Austin Seipp <austin at well-typed.com>


>---------------------------------------------------------------

b059dcc81e9c4097b5f04f85e1ac33586c494110
 docs/users_guide/glasgow_exts.xml |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/docs/users_guide/glasgow_exts.xml b/docs/users_guide/glasgow_exts.xml
index 44f0d98..c5ecbe3 100644
--- a/docs/users_guide/glasgow_exts.xml
+++ b/docs/users_guide/glasgow_exts.xml
@@ -856,9 +856,11 @@ y)</literal> will not be coalesced.
 </title>
 
 <para>
-Pattern synonyms are enabled by the flag <literal>-XPatternSynonyms</literal>.
-More information and examples of view patterns can be found on the
-<ulink url="http://ghc.haskell.org/trac/ghc/wiki/PatternSynonyms">Wiki
+Pattern synonyms are enabled by the flag
+<literal>-XPatternSynonyms</literal>, which is required for both
+defining them <emphasis>and</emphasis> using them.  More information
+and examples of view patterns can be found on the <ulink
+url="http://ghc.haskell.org/trac/ghc/wiki/PatternSynonyms">Wiki
 page</ulink>.
 </para>