1<?xml version="1.0" encoding="UTF-8" standalone="no"?> 2<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 3<html xmlns="http://www.w3.org/1999/xhtml"> 4 <head> 5 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> 6 <title>operator-</title> 7 <link rel="stylesheet" href="apiReference.css" type="text/css" /> 8 <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> 9 <link rel="start" href="index.html" title="Berkeley DB C++ Standard Template Library API Reference" /> 10 <link rel="up" href="db_vector_iterator.html" title="Chapter��13.�� Db_vector_iterator" /> 11 <link rel="prev" href="stldb_vector_iteratoroperator_ia.html" title="operator+=" /> 12 <link rel="next" href="stldb_vector_iteratoroperator_sa.html" title="operator-=" /> 13 </head> 14 <body> 15 <div class="navheader"> 16 <table width="100%" summary="Navigation header"> 17 <tr> 18 <th colspan="3" align="center"> 19operator- 20</th> 21 </tr> 22 <tr> 23 <td width="20%" align="left"><a accesskey="p" href="stldb_vector_iteratoroperator_ia.html">Prev</a>��</td> 24 <th width="60%" align="center">Chapter��13.�� 25 Db_vector_iterator </th> 26 <td width="20%" align="right">��<a accesskey="n" href="stldb_vector_iteratoroperator_sa.html">Next</a></td> 27 </tr> 28 </table> 29 <hr /> 30 </div> 31 <div class="sect1" lang="en" xml:lang="en"> 32 <div class="titlepage"> 33 <div> 34 <div> 35 <h2 class="title" style="clear: both"><a id="stldb_vector_iteratoroperator_sub"></a> 36operator- 37</h2> 38 </div> 39 </div> 40 </div> 41 <div class="sect2" lang="en" xml:lang="en"> 42 <div class="titlepage"> 43 <div> 44 <div> 45 <h3 class="title"><a id="func_details"></a> 46Function Details</h3> 47 </div> 48 </div> 49 </div> 50 <pre class="programlisting"> 51self��operator-(difference_type��n)��const 52 </pre> 53 <div class="sect3" lang="en" xml:lang="en"> 54 <div class="titlepage"></div> 55 <p>Iterator movement operator. </p> 56 <p>Return another iterator by moving this iterator forward by n elements. </p> 57 </div> 58 <div class="sect3" lang="en" xml:lang="en"> 59 <div class="titlepage"> 60 <div> 61 <div> 62 <h4 class="title"><a id="id1562093"></a> 63Parameters</h4> 64 </div> 65 </div> 66 </div> 67 <div class="sect4" lang="en" xml:lang="en"> 68 <div class="titlepage"> 69 <div> 70 <div> 71 <h5 class="title"><a id="id1562046"></a> 72 n </h5> 73 </div> 74 </div> 75 </div> 76 <p>The amount and direction of movement. If negative, will move backward by |n| element. </p> 77 </div> 78 </div> 79 <div class="sect3" lang="en" xml:lang="en"> 80 <div class="titlepage"> 81 <div> 82 <div> 83 <h4 class="title"><a id="id1562094"></a> 84Return Value</h4> 85 </div> 86 </div> 87 </div> 88 <p>The new iterator at new position. </p> 89 </div> 90 <div class="sect3" lang="en" xml:lang="en"> 91 <div class="titlepage"> 92 <div> 93 <div> 94 <h4 class="title"><a id="id1562062"></a> 95See Also</h4> 96 </div> 97 </div> 98 </div> 99 <p> 100 </p> 101 <p><a class="link" href="stldb_vector_base_iteratoroperator_sub.html" title="operator-">db_vector_base_iterator::operator-(difference_type n) const</a> 102 </p> 103 <p> </p> 104 </div> 105 <pre class="programlisting"> 106difference_type��operator-(const��self��&itr)��const 107 </pre> 108 <div class="sect3" lang="en" xml:lang="en"> 109 <div class="titlepage"></div> 110 <p>Iterator distance operator. </p> 111 <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> 112 </div> 113 <div class="sect3" lang="en" xml:lang="en"> 114 <div class="titlepage"> 115 <div> 116 <div> 117 <h4 class="title"><a id="id1561996"></a> 118Parameters</h4> 119 </div> 120 </div> 121 </div> 122 <div class="sect4" lang="en" xml:lang="en"> 123 <div class="titlepage"> 124 <div> 125 <div> 126 <h5 class="title"><a id="id1561901"></a> 127 itr </h5> 128 </div> 129 </div> 130 </div> 131 <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> 132 </div> 133 </div> 134 <div class="sect3" lang="en" xml:lang="en"> 135 <div class="titlepage"> 136 <div> 137 <div> 138 <h4 class="title"><a id="id1561997"></a> 139Return Value</h4> 140 </div> 141 </div> 142 </div> 143 <p>The index difference. </p> 144 </div> 145 <div class="sect3" lang="en" xml:lang="en"> 146 <div class="titlepage"> 147 <div> 148 <div> 149 <h4 class="title"><a id="id1561766"></a> 150See Also</h4> 151 </div> 152 </div> 153 </div> 154 <p> 155 </p> 156 <p><a class="link" href="stldb_vector_base_iteratoroperator_sub.html" title="operator-">db_vector_base_iterator::operator-(const self& itr) const</a> 157 </p> 158 <p> </p> 159 </div> 160 </div> 161 <div class="sect2" lang="en" xml:lang="en"> 162 <div class="titlepage"> 163 <div> 164 <div> 165 <h3 class="title"><a id="id1562090"></a> 166Group: Iterator movement operators.</h3> 167 </div> 168 </div> 169 </div> 170 <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> 171, so please refer to equivalent in that class. </p> 172 </div> 173 <div class="sect2" lang="en" xml:lang="en"> 174 <div class="titlepage"> 175 <div> 176 <div> 177 <h3 class="title"><a id="id1562182"></a> 178Class</h3> 179 </div> 180 </div> 181 </div> 182 <p> 183 <a class="link" href="db_vector_iterator.html" title="Chapter��13.�� Db_vector_iterator"> 184 db_vector_iterator</a> 185 </p> 186 </div> 187 </div> 188 <div class="navfooter"> 189 <hr /> 190 <table width="100%" summary="Navigation footer"> 191 <tr> 192 <td width="40%" align="left"><a accesskey="p" href="stldb_vector_iteratoroperator_ia.html">Prev</a>��</td> 193 <td width="20%" align="center"> 194 <a accesskey="u" href="db_vector_iterator.html">Up</a> 195 </td> 196 <td width="40%" align="right">��<a accesskey="n" href="stldb_vector_iteratoroperator_sa.html">Next</a></td> 197 </tr> 198 <tr> 199 <td width="40%" align="left" valign="top"> 200operator+= 201��</td> 202 <td width="20%" align="center"> 203 <a accesskey="h" href="index.html">Home</a> 204 </td> 205 <td width="40%" align="right" valign="top">�� 206operator-= 207</td> 208 </tr> 209 </table> 210 </div> 211 </body> 212</html> 213