    <para>
      The argment type <type>gentype</type> can be <type>char</type>,
      <type>char<replaceable>n</replaceable></type>,<type>uchar</type>,
      <type>uchar<replaceable>n</replaceable></type>, <type>short</type>,
      <type>short<replaceable>n</replaceable></type>, <type>ushort</type>,
      <type>ushort<replaceable>n</replaceable></type>, <type>int</type>,
      <type>int<replaceable>n</replaceable></type>, <type>uint</type>,
      <type>uint<replaceable>n</replaceable></type>, <type>long</type>,
      <type>long<replaceable>n</replaceable></type>, <type>ulong</type>,
      <type>ulong<replaceable>n</replaceable></type>, <type>float</type>,
      <type>float<replaceable>n</replaceable></type>, <type>double</type>, and
      <type>double<replaceable>n</replaceable></type>.
    </para>

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