<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>operator-</title> <link rel="stylesheet" href="apiReference.css" type="text/css" /> <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> <link rel="start" href="index.html" title="Berkeley DB C++ Standard Template Library API Reference" /> <link rel="up" href="db_vector_iterator.html" title="Chapter 13. Db_vector_iterator" /> <link rel="prev" href="stldb_vector_iteratoroperator_ia.html" title="operator+=" /> <link rel="next" href="stldb_vector_iteratoroperator_sa.html" title="operator-=" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center"> operator- </th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="stldb_vector_iteratoroperator_ia.html">Prev</a> </td> <th width="60%" align="center">Chapter 13. Db_vector_iterator </th> <td width="20%" align="right"> <a accesskey="n" href="stldb_vector_iteratoroperator_sa.html">Next</a></td> </tr> </table> <hr /> </div> <div class="sect1" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h2 class="title" style="clear: both"><a id="stldb_vector_iteratoroperator_sub"></a> operator- </h2> </div> </div> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="func_details"></a> Function Details</h3> </div> </div> </div> <pre class="programlisting"> self operator-(difference_type n) const </pre> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"></div> <p>Iterator movement operator. </p> <p>Return another iterator by moving this iterator forward by n elements. </p> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id1562041"></a> Parameters</h4> </div> </div> </div> <div class="sect4" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h5 class="title"><a id="id1562160"></a> n </h5> </div> </div> </div> <p>The amount and direction of movement. If negative, will move backward by |n| element. </p> </div> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id1562213"></a> Return Value</h4> </div> </div> </div> <p>The new iterator at new position. </p> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id1562278"></a> See Also</h4> </div> </div> </div> <p> </p> <p><a class="link" href="stldb_vector_base_iteratoroperator_sub.html" title="operator-">db_vector_base_iterator::operator-(difference_type n) const</a> </p> <p> </p> </div> <pre class="programlisting"> difference_type operator-(const self &itr) const </pre> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"></div> <p>Iterator distance operator. </p> <p>Return the index difference of this iterator and itr, so if this iterator sits on an element with a smaller index, this call will return a negative number. </p> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id1561901"></a> Parameters</h4> </div> </div> </div> <div class="sect4" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h5 class="title"><a id="id1562069"></a> itr </h5> </div> </div> </div> <p>The other iterator to substract. itr can be the invalid iterator after last element or before first element, their index will be regarded as last element's index + 1 and -1 respectively. </p> </div> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id1562171"></a> Return Value</h4> </div> </div> </div> <p>The index difference. </p> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id1562050"></a> See Also</h4> </div> </div> </div> <p> </p> <p><a class="link" href="stldb_vector_base_iteratoroperator_sub.html" title="operator-">db_vector_base_iterator::operator-(const self& itr) const</a> </p> <p> </p> </div> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="id1562427"></a> Group: Iterator movement operators.</h3> </div> </div> </div> <p>These functions have identical behaviors and semantics as those of <a class="link" href="db_vector_base_iterator.html" title="Chapter 12. Db_vector_base_iterator">db_vector_base_iterator</a> , so please refer to equivalent in that class. </p> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="id1562182"></a> Class</h3> </div> </div> </div> <p> <a class="link" href="db_vector_iterator.html" title="Chapter 13. Db_vector_iterator"> db_vector_iterator</a> </p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="stldb_vector_iteratoroperator_ia.html">Prev</a> </td> <td width="20%" align="center"> <a accesskey="u" href="db_vector_iterator.html">Up</a> </td> <td width="40%" align="right"> <a accesskey="n" href="stldb_vector_iteratoroperator_sa.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top"> operator+= </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> operator-= </td> </tr> </table> </div> </body> </html>