Document -fwarn-missing-local-sigs; part of #4817

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

diff --git a/docs/users_guide/using.xml b/docs/users_guide/using.xml
index 8b08d9d..115c290 100644 (file)
--- a/docs/users_guide/using.xml
+++ b/docs/users_guide/using.xml
@@ -1373,6 +1373,20 @@ module M where
       </varlistentry>
 
       <varlistentry>
+       <term><option>-fwarn-missing-local-sigs</option>:</term>
+       <listitem>
+         <indexterm><primary><option>-fwarn-missing-local-sigs</option></primary></indexterm>
+         <indexterm><primary>type signatures, missing</primary></indexterm>
+
+         <para>If you use the
+          <option>-fwarn-missing-local-sigs</option> flag GHC will warn
+          you about any polymorphic local bindings. As part of
+           the warning GHC also reports the inferred type. The
+          option is off by default.</para>
+       </listitem>
+      </varlistentry>
+
+      <varlistentry>
        <term><option>-fwarn-name-shadowing</option>:</term>
        <listitem>
          <indexterm><primary><option>-fwarn-name-shadowing</option></primary></indexterm>