X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fdocs%2Fusers_guide%2Fbugs.xml;fp=ghc%2Fdocs%2Fusers_guide%2Fbugs.xml;h=07ed08d14d19b7266620f4b83642f79fc05c8394;hb=d30dfda61ad502aac00630928b4b04964ebf54d9;hp=6a07c90c5826671bd67348323e96768a7f95a5c3;hpb=9e69f47dc584b27abdda947ed85cd1d295b9401a;p=ghc-hetmet.git

diff --git a/ghc/docs/users_guide/bugs.xml b/ghc/docs/users_guide/bugs.xml
index 6a07c90..07ed08d 100644
--- a/ghc/docs/users_guide/bugs.xml
+++ b/ghc/docs/users_guide/bugs.xml
@@ -145,6 +145,20 @@ checking for duplicates.  The reason for this is efficiency, pure and simple.
 		octal escapes, so it seems inconsistent not to do so for integers too.</para>
 	    </listitem>
 	  </varlistentry>
+
+	  <varlistentry>
+	    <term><literal>isAlpha</literal></term>
+	    <listitem>
+	      <para>The Haskell 98 definition of <literal>isAlpha</literal>
+              is:</para>
+
+<programlisting>isAlpha c = isUpper c || isLower c</programlisting>
+
+	      <para>GHC's implementation diverges from the Haskell 98
+              definition in the sense that Unicode alphabetic characters which
+              are neither upper nor lower case will still be identified as
+              alphabetic by <literal>isAlpha</literal>.</para>
+	    </listitem>
 	</variablelist>
     </sect3>
   </sect2>