      transform_iterator&lt;F2, I2, R2, V2&gt; const&amp; t
    , typename enable_if_convertible&lt;I2, Iterator&gt;::type* = 0      // exposition only
    , typename enable_if_convertible&lt;F2, UnaryFunction&gt;::type* = 0 // exposition only
);
</pre>
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<tr class="field"><th class="field-name">Returns:</th><td class="field-body">An instance of <tt class="docutils literal">