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<h1 class="title">Writable Iterator Concept</h1>
<div class="document" id="writable-iterator-concept">
<p>A class or built-in type <tt class="literal"><span class="pre">X</span></tt> models the <em>Writable Iterator</em> concept
if, in addition to <tt class="literal"><span class="pre">X</span></tt> being Copy Constructible, the following
expressions are valid and respect the stated semantics. Writable
Iterators have an associated <em>set of value types</em>.</p>
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<tr><th colspan="3">Writable Iterator Requirements (in addition to Copy Constructible)</th>
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<tr><th>Expression</th>
<th>Return Type</th>
<th>Precondition</th>
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<tr><td><tt class="literal"><span class="pre">*a</span> <span class="pre">=</span> <span class="pre">o</span></tt></td>
<td> </td>
<td>pre: The type of <tt class="literal"><span class="pre">o</span></tt>
is in the set of
value types of <tt class="literal"><span class="pre">X</span></tt></td>
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