Improve dumping for rules, and documentation of same

[ghc-hetmet.git] / docs / users_guide / glasgow_exts.xml

diff --git a/docs/users_guide/glasgow_exts.xml b/docs/users_guide/glasgow_exts.xml
index 7e88a4f..603c6c6 100644 (file)
--- a/docs/users_guide/glasgow_exts.xml
+++ b/docs/users_guide/glasgow_exts.xml
@@ -8605,8 +8605,8 @@ comparison.
 
 </sect2>
 
-<sect2>
-<title>Controlling what's going on</title>
+<sect2 id="controlling-rules">
+<title>Controlling what's going on in rewrite rules</title>
 
 <para>
 
@@ -8614,7 +8614,10 @@ comparison.
 <listitem>
 
 <para>
- Use <option>-ddump-rules</option> to see what transformation rules GHC is using.
+Use <option>-ddump-rules</option> to see the rules that are defined
+<emphasis>in this module</emphasis>.
+This includes rules generated by the specialisation pass, but excludes
+rules imported from other modules. 
 </para>
 </listitem>