<div class="document" id="single-pass-iterator-concept">
<h1 class="title">Single Pass Iterator Concept</h1>
<p>A class or built-in type <tt class="literal"><span class="pre">X</span></tt> models the <em>Single Pass Iterator</em>
concept if the following expressions are valid and respect the stated
semantics.</p>
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<tr><th colspan="3">Single Pass Iterator Requirements (in add