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-rw-r--r--nixos/doc/manual/development/option-types.xml12
1 files changed, 12 insertions, 0 deletions
diff --git a/nixos/doc/manual/development/option-types.xml b/nixos/doc/manual/development/option-types.xml
index 069cc36573d8..8fcbb627342b 100644
--- a/nixos/doc/manual/development/option-types.xml
+++ b/nixos/doc/manual/development/option-types.xml
@@ -348,6 +348,18 @@
    </varlistentry>
    <varlistentry>
     <term>
+     <varname>types.oneOf</varname> [ <replaceable>t1</replaceable> <replaceable>t2</replaceable> ... ]
+    </term>
+    <listitem>
+     <para>
+      Type <replaceable>t1</replaceable> or type <replaceable>t2</replaceable> and so forth,
+      e.g. <literal>with types; oneOf [ int str bool ]</literal>. Multiple definitions
+      cannot be merged.
+     </para>
+    </listitem>
+   </varlistentry>
+   <varlistentry>
+    <term>
      <varname>types.coercedTo</varname> <replaceable>from</replaceable> <replaceable>f</replaceable> <replaceable>to</replaceable>
     </term>
     <listitem>