Add -XImpredicativeTypes, and tighten up type-validity checking (cf Trac 2019)

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

diff --git a/docs/users_guide/flags.xml b/docs/users_guide/flags.xml
index cb993af..6694adf 100644 (file)
--- a/docs/users_guide/flags.xml
+++ b/docs/users_guide/flags.xml
@@ -797,6 +797,12 @@
              <entry><option>-XNoRankNTypes</option></entry>
            </row>
            <row>
+             <entry><option>-XImpredicativeTypes</option></entry>
+             <entry>Enable <link linkend="impredicative-polymorphism">impredicative types</link>.</entry>
+             <entry>dynamic</entry>
+             <entry><option>-XNoImpredicativeTypes</option></entry>
+           </row>
+           <row>
              <entry><option>-XExistentialQuantification</option></entry>
              <entry>Enable <link linkend="existential-quantification">existential quantification</link>.</entry>
              <entry>dynamic</entry>