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27. Iterators
</h2></div></div></div><p>24.3.2 describes
<code class=
"code">struct iterator
</code>, which didn't exist in the
7 original HP STL implementation (the language wasn't rich enough at the
8 time). For backwards compatibility, base classes are provided which
9 declare the same nested typedefs:
10 </p><div class=
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</p></li><li class=
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</p></li><li class=
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</p></li><li class=
"listitem"><p>bidirectional_iterator
</p></li><li class=
"listitem"><p>random_access_iterator
</p></li></ul></div><p>24.3.4 describes iterator operation
<code class=
"code">distance
</code>, which takes
11 two iterators and returns a result. It is extended by another signature
12 which takes two iterators and a reference to a result. The result is
13 modified, and the function returns nothing.
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