an class=identifier>boost</span><span class=special>/</span><span class=identifier>bind</span><span class=special>.</span><span class=identifier>hpp</span><span class=special>&gt;</span>
<span class=preprocessor>#include </span><span class=special>&lt;</span><span class=identifier>vector</span><span class=special>&gt;</span>
<span class=preprocessor>#include </span><span class=special>&lt;</span><span class=identifier>stdexcept</span><span class=special>&gt;
</span>
<span class=keyword>namespace </span><spa