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        <p>Library Version 18.1.40</p>
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self&amp; operator++()
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        <p>Pre-increment. </p>
        <p>Move the iterator one element backward, so that the element it sits on has a bigger index. Use ++iter rather than iter++ where possible to avoid two useless iterator copy constructions. </p>
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          <p>This iterator after incremented. </p>
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self operator++(int)
 </pre>
        <p>Post-increment. </p>
        <p>Move the iterator one element backward, so that the element it sits on has a bigger index. Use ++iter rather than iter++ where possible to avoid two useless iterator copy constructions. </p>
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          <p>A new iterator not incremented. </p>
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              <h3 class="title"><a id="idm140317942527328"></a>Group: Iterator movement operators.</h3>
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        <p>When we talk about iterator movement, we think the container is a uni-directional range, represented by [begin, end), and this is true no matter we are using iterators or reverse iterators.</p>
        <p>When an iterator is moved closer to "begin", we say it is moved forward, otherwise we say it is moved backward. </p>
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