<li><a href="21_strings/howto.html#3">Breaking a C++ string into tokens</a></li>
<li><a href="21_strings/howto.html#4">Simple transformations</a></li>
<li><a href="21_strings/howto.html#5">Making strings of arbitrary character types</a></li>
+ <li><a href="21_strings/howto.html#6">Shrink-to-fit strings</a></li>
</ul>
</li>