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<p>Library Version 18.1.40</p>
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<p>
Three algorithm functions of gcc's C++ STL test suite do
not work with dbstl. They are <code class="function">find_end()</code>,
<code class="function">inplace_merge()</code> and
<code class="function">stable_sort()</code>.
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<p>
The reason for the incompatibility of
<code class="function">find_end()</code> is that it assumes the
data an iterator refers to is located at a shared place (owned
by its container). This assumption is not correct in that it
is part of the C++ STL standards specification. However, this
assumption can not be true for dbstl because each dbstl
container iterator caches its referenced value.
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Consequently, please do not use
<code class="function">find_end()</code> for dbstl container
iterators if you are using gcc's STL library.
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The reason for the incompatibility with
<code class="function">inplace_merge()</code> and
<code class="function">stable_sort()</code> is that their
implementation in gcc requires the <span class="bold"><strong>
value_type</strong></span> for a container to be default
constructible. This requirement is not a part of the the C++
STL standard specification. Dbstl's value type wrappers (such
as <code class="classname">ElementHolder</code>) do not support it.
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<p>
These issues do not exist for any function available with
the Microsoft Visual C++ 8 STL library. There are two
algorithm functions of Microsoft Visual C++ 10 STL library
that do have an issue: <code class="function">partial_sort()</code> and
<code class="function">partial_sort_copy()</code>. These are not
compatible because they require the dbstl
<code class="literal">vector</code> iterator to create a new element
when updating the current element. Dbstl
<code class="literal">vector</code> iterator can copy the new
content to the current element, but it cannot create a new
one. This requirement is not a part of the C++ STL standard
specification, and so dbstl's <code class="literal">vector</code>
iterator does not support it.
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