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<td >Qt 5.9</td><td ><a href="qtcore-index.html">Qt Core</a></td><td ><a href="qtcore-module.html">C++ Classes</a></td><td >QStringMatcher</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QStringMatcher Class</h1>
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<p>The <a href="qstringmatcher.html">QStringMatcher</a> class holds a sequence of characters that can be quickly matched in a Unicode string. <a href="#details">More...</a></p>
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<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign">   <span class="preprocessor">#include &lt;QStringMatcher&gt;</span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += core</td></tr></table></div><ul>
<li><a href="qstringmatcher-members.html">List of all members, including inherited members</a></li>
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<a name="public-functions"></a>
<h2 id="public-functions">Public Functions</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qstringmatcher.html#QStringMatcher">QStringMatcher</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qstringmatcher.html#QStringMatcher-1">QStringMatcher</a></b>(const QString &amp;<i>pattern</i>, Qt::CaseSensitivity <i>cs</i> = Qt::CaseSensitive)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qstringmatcher.html#QStringMatcher-2">QStringMatcher</a></b>(const QChar *<i>uc</i>, int <i>length</i>, Qt::CaseSensitivity <i>cs</i> = Qt::CaseSensitive)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qstringmatcher.html#QStringMatcher-3">QStringMatcher</a></b>(const QStringMatcher &amp;<i>other</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qstringmatcher.html#dtor.QStringMatcher">~QStringMatcher</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> Qt::CaseSensitivity </td><td class="memItemRight bottomAlign"><b><a href="qstringmatcher.html#caseSensitivity">caseSensitivity</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qstringmatcher.html#indexIn">indexIn</a></b>(const QString &amp;<i>str</i>, int <i>from</i> = 0) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qstringmatcher.html#indexIn-1">indexIn</a></b>(const QChar *<i>str</i>, int <i>length</i>, int <i>from</i> = 0) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qstringmatcher.html#pattern">pattern</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qstringmatcher.html#setCaseSensitivity">setCaseSensitivity</a></b>(Qt::CaseSensitivity <i>cs</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qstringmatcher.html#setPattern">setPattern</a></b>(const QString &amp;<i>pattern</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QStringMatcher &amp;</td><td class="memItemRight bottomAlign"><b><a href="qstringmatcher.html#operator-eq">operator=</a></b>(const QStringMatcher &amp;<i>other</i>)</td></tr>
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<a name="details"></a>
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<div class="descr">
<h2 id="details">Detailed Description</h2>
<p>The <a href="qstringmatcher.html">QStringMatcher</a> class holds a sequence of characters that can be quickly matched in a Unicode string.</p>
<p>This class is useful when you have a sequence of <a href="qchar.html">QChar</a>s that you want to repeatedly match against some strings (perhaps in a loop), or when you want to search for the same sequence of characters multiple times in the same string. Using a matcher object and <a href="qstringmatcher.html#indexIn">indexIn</a>() is faster than matching a plain <a href="qstring.html">QString</a> with <a href="qstring.html#indexOf">QString::indexOf</a>() if repeated matching takes place. This class offers no benefit if you are doing one-off string matches.</p>
<p>Create the <a href="qstringmatcher.html">QStringMatcher</a> with the <a href="qstring.html">QString</a> you want to search for. Then call <a href="qstringmatcher.html#indexIn">indexIn</a>() on the <a href="qstring.html">QString</a> that you want to search.</p>
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<p><b>See also </b><a href="qstring.html">QString</a>, <a href="qbytearraymatcher.html">QByteArrayMatcher</a>, and <a href="qregexp.html">QRegExp</a>.</p>
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<div class="func">
<h2>Member Function Documentation</h2>
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<h3 class="fn" id="QStringMatcher"><a name="QStringMatcher"></a>QStringMatcher::<span class="name">QStringMatcher</span>()</h3>
<p>Constructs an empty string matcher that won't match anything. Call <a href="qstringmatcher.html#setPattern">setPattern</a>() to give it a pattern to match.</p>
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<h3 class="fn" id="QStringMatcher-1"><a name="QStringMatcher-1"></a>QStringMatcher::<span class="name">QStringMatcher</span>(const <span class="type"><a href="qstring.html">QString</a></span> &amp;<i>pattern</i>, <span class="type"><a href="qt.html#CaseSensitivity-enum">Qt::CaseSensitivity</a></span> <i>cs</i> = Qt::CaseSensitive)</h3>
<p>Constructs a string matcher that will search for <i>pattern</i>, with case sensitivity <i>cs</i>.</p>
<p>Call <a href="qstringmatcher.html#indexIn">indexIn</a>() to perform a search.</p>
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<h3 class="fn" id="QStringMatcher-2"><a name="QStringMatcher-2"></a>QStringMatcher::<span class="name">QStringMatcher</span>(const <span class="type"><a href="qchar.html">QChar</a></span> *<i>uc</i>, <span class="type">int</span> <i>length</i>, <span class="type"><a href="qt.html#CaseSensitivity-enum">Qt::CaseSensitivity</a></span> <i>cs</i> = Qt::CaseSensitive)</h3>
<p>Constructs a string matcher that will search for the pattern referred to by <i>uc</i> with the given <i>length</i> and case sensitivity specified by <i>cs</i>.</p>
<p>This function was introduced in  Qt 4.5.</p>
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<h3 class="fn" id="QStringMatcher-3"><a name="QStringMatcher-3"></a>QStringMatcher::<span class="name">QStringMatcher</span>(const <span class="type"><a href="qstringmatcher.html#QStringMatcher">QStringMatcher</a></span> &amp;<i>other</i>)</h3>
<p>Copies the <i>other</i> string matcher to this string matcher.</p>
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<h3 class="fn" id="dtor.QStringMatcher"><a name="dtor.QStringMatcher"></a>QStringMatcher::<span class="name">~QStringMatcher</span>()</h3>
<p>Destroys the string matcher.</p>
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<h3 class="fn" id="caseSensitivity"><a name="caseSensitivity"></a><span class="type"><a href="qt.html#CaseSensitivity-enum">Qt::CaseSensitivity</a></span> QStringMatcher::<span class="name">caseSensitivity</span>() const</h3>
<p>Returns the case sensitivity setting for this string matcher.</p>
<p><b>See also </b><a href="qstringmatcher.html#setCaseSensitivity">setCaseSensitivity</a>().</p>
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<h3 class="fn" id="indexIn"><a name="indexIn"></a><span class="type">int</span> QStringMatcher::<span class="name">indexIn</span>(const <span class="type"><a href="qstring.html">QString</a></span> &amp;<i>str</i>, <span class="type">int</span> <i>from</i> = 0) const</h3>
<p>Searches the string <i>str</i> from character position <i>from</i> (default 0, i.e&#x2e; from the first character), for the string <a href="qstringmatcher.html#pattern">pattern</a>() that was set in the constructor or in the most recent call to <a href="qstringmatcher.html#setPattern">setPattern</a>(). Returns the position where the <a href="qstringmatcher.html#pattern">pattern</a>() matched in <i>str</i>, or -1 if no match was found.</p>
<p><b>See also </b><a href="qstringmatcher.html#setPattern">setPattern</a>() and <a href="qstringmatcher.html#setCaseSensitivity">setCaseSensitivity</a>().</p>
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<h3 class="fn" id="indexIn-1"><a name="indexIn-1"></a><span class="type">int</span> QStringMatcher::<span class="name">indexIn</span>(const <span class="type"><a href="qchar.html">QChar</a></span> *<i>str</i>, <span class="type">int</span> <i>length</i>, <span class="type">int</span> <i>from</i> = 0) const</h3>
<p>Searches the string starting at <i>str</i> (of length <i>length</i>) from character position <i>from</i> (default 0, i.e&#x2e; from the first character), for the string <a href="qstringmatcher.html#pattern">pattern</a>() that was set in the constructor or in the most recent call to <a href="qstringmatcher.html#setPattern">setPattern</a>(). Returns the position where the <a href="qstringmatcher.html#pattern">pattern</a>() matched in <i>str</i>, or -1 if no match was found.</p>
<p>This function was introduced in  Qt 4.5.</p>
<p><b>See also </b><a href="qstringmatcher.html#setPattern">setPattern</a>() and <a href="qstringmatcher.html#setCaseSensitivity">setCaseSensitivity</a>().</p>
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<h3 class="fn" id="pattern"><a name="pattern"></a><span class="type"><a href="qstring.html">QString</a></span> QStringMatcher::<span class="name">pattern</span>() const</h3>
<p>Returns the string pattern that this string matcher will search for.</p>
<p><b>See also </b><a href="qstringmatcher.html#setPattern">setPattern</a>().</p>
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<h3 class="fn" id="setCaseSensitivity"><a name="setCaseSensitivity"></a><span class="type">void</span> QStringMatcher::<span class="name">setCaseSensitivity</span>(<span class="type"><a href="qt.html#CaseSensitivity-enum">Qt::CaseSensitivity</a></span> <i>cs</i>)</h3>
<p>Sets the case sensitivity setting of this string matcher to <i>cs</i>.</p>
<p><b>See also </b><a href="qstringmatcher.html#caseSensitivity">caseSensitivity</a>(), <a href="qstringmatcher.html#setPattern">setPattern</a>(), and <a href="qstringmatcher.html#indexIn">indexIn</a>().</p>
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<h3 class="fn" id="setPattern"><a name="setPattern"></a><span class="type">void</span> QStringMatcher::<span class="name">setPattern</span>(const <span class="type"><a href="qstring.html">QString</a></span> &amp;<i>pattern</i>)</h3>
<p>Sets the string that this string matcher will search for to <i>pattern</i>.</p>
<p><b>See also </b><a href="qstringmatcher.html#pattern">pattern</a>(), <a href="qstringmatcher.html#setCaseSensitivity">setCaseSensitivity</a>(), and <a href="qstringmatcher.html#indexIn">indexIn</a>().</p>
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<h3 class="fn" id="operator-eq"><a name="operator-eq"></a><span class="type"><a href="qstringmatcher.html#QStringMatcher">QStringMatcher</a></span> &amp;QStringMatcher::<span class="name">operator=</span>(const <span class="type"><a href="qstringmatcher.html#QStringMatcher">QStringMatcher</a></span> &amp;<i>other</i>)</h3>
<p>Assigns the <i>other</i> string matcher to this string matcher.</p>
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