mpl">proto::transform_impl</a><span class="special">&lt;</span> <span class="identifier">Expr</span><span class="special">,</span> <span class="identifier">State</span><span class="special">,</span> <span class="identifier">Data</span> <span class="special">&gt;</span> <span class="special">{</span>
    <span class="comment">// <a class="link" href="make/impl.html#boost.proto.make.impltypes">types</a></span>
    <span class="keyword">typedef</span> <span class="emphasis"><em><span class="identifier">see</sp