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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>Wt: Wt::WString Class Reference</title>
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<h1>Wt::WString Class Reference</h1><!-- doxytag: class="Wt::WString" -->A unicode string class, with support for localization.
<a href="#_details">More...</a>
<p>
<code>#include <Wt/WString></code>
<p>
<p>
<a href="classWt_1_1WString-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#b1118313feb49fd2a1f7eab40f7f7a56">WString</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Creates an empty string. <a href="#b1118313feb49fd2a1f7eab40f7f7a56"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#1259e1f8285f3e04ef62fb59e6c83f4e">WString</a> (const wchar_t *value)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Creates a WString from a wide C string. <a href="#1259e1f8285f3e04ef62fb59e6c83f4e"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="22fb311a713484d978b52b6787910da7"></a><!-- doxytag: member="Wt::WString::WString" ref="22fb311a713484d978b52b6787910da7" args="(const WString &other)" -->
</td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#22fb311a713484d978b52b6787910da7">WString</a> (const <a class="el" href="classWt_1_1WString.html">WString</a> &other)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Copy constructor. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#217c6be8205e02d3e2580b6c59357bb6">WString</a> (const std::wstring &value)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Creates a WString from a wide C++ string. <a href="#217c6be8205e02d3e2580b6c59357bb6"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#a1e577f4cf6352a3a657fde3f7d3034e">WString</a> (const char *value, <a class="el" href="classWt_1_1WString.html#55b820090cc9d15753301df90e35fd52">CharEncoding</a> encoding=LocalEncoding)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Creates a WString from a C string. <a href="#a1e577f4cf6352a3a657fde3f7d3034e"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#d2b612d535553feb1e4d08347f5475b1">WString</a> (const char *value, const std::locale &loc)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Creates a WString from a C string. <a href="#d2b612d535553feb1e4d08347f5475b1"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#65df74efecfae4e46c68fe3ff28ff81d">WString</a> (const std::string &value, <a class="el" href="classWt_1_1WString.html#55b820090cc9d15753301df90e35fd52">CharEncoding</a> encoding=LocalEncoding)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Creates a WString from a C++ string. <a href="#65df74efecfae4e46c68fe3ff28ff81d"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#5aaf5904a4293de24d79ec953cf0d3b6">WString</a> (const std::string &value, const std::locale &loc)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Creates a WString from a C++ string. <a href="#5aaf5904a4293de24d79ec953cf0d3b6"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="d3e7e1481f31514ecf58a6a344ec6ca6"></a><!-- doxytag: member="Wt::WString::~WString" ref="d3e7e1481f31514ecf58a6a344ec6ca6" args="()" -->
</td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#d3e7e1481f31514ecf58a6a344ec6ca6">~WString</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Destructor. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="classWt_1_1WString.html">WString</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#fbd9254fb159d682ed4a2227a7ec69b7">operator=</a> (const <a class="el" href="classWt_1_1WString.html">WString</a> &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Assignment operator. <a href="#fbd9254fb159d682ed4a2227a7ec69b7"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#5a1bf5761127553e8189a278525af71c">operator==</a> (const <a class="el" href="classWt_1_1WString.html">WString</a> &rhs) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Comparison operator. <a href="#5a1bf5761127553e8189a278525af71c"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#ccc7df36ce3febb1b2e1c297b30fafd2">operator<</a> (const <a class="el" href="classWt_1_1WString.html">WString</a> &rhs) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Comparison operator. <a href="#ccc7df36ce3febb1b2e1c297b30fafd2"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#111e77b8cf401664d191eaf3f85867b1">operator></a> (const <a class="el" href="classWt_1_1WString.html">WString</a> &rhs) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Comparison operator. <a href="#111e77b8cf401664d191eaf3f85867b1"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="classWt_1_1WString.html">WString</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#bb46a3098a1a185a3498fbcf4c714c7b">operator+=</a> (const <a class="el" href="classWt_1_1WString.html">WString</a> &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Self-concatenation operator. <a href="#bb46a3098a1a185a3498fbcf4c714c7b"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="classWt_1_1WString.html">WString</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#0c455e324e5e756c456cd662f829373c">operator+=</a> (const std::wstring &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Self-concatenation operator. <a href="#0c455e324e5e756c456cd662f829373c"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="classWt_1_1WString.html">WString</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#64bbf435dfe82342ce43faf9c48ee28f">operator+=</a> (const wchar_t *rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Self-concatenation operator. <a href="#64bbf435dfe82342ce43faf9c48ee28f"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="classWt_1_1WString.html">WString</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#36d097b2ed9a2e921ad2d6a79bc3dd25">operator+=</a> (const std::string &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Self-concatenation operator. <a href="#36d097b2ed9a2e921ad2d6a79bc3dd25"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="classWt_1_1WString.html">WString</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#cac4b0bc682e0789edc2976883ed7a5a">operator+=</a> (const char *rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Self-concatenation operator. <a href="#cac4b0bc682e0789edc2976883ed7a5a"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="87a90e69ab25d62ba029e10ea244abaf"></a><!-- doxytag: member="Wt::WString::empty" ref="87a90e69ab25d62ba029e10ea244abaf" args="() const " -->
bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#87a90e69ab25d62ba029e10ea244abaf">empty</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns whether the string is empty. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#159d088da6e8f2be1035b2341889254c">toUTF8</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the value as a UTF8 unicode encoded string. <a href="#159d088da6e8f2be1035b2341889254c"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">std::wstring </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#b76d45947986f8aa20763cf99267ec23">value</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the value as a wide C++ string. <a href="#b76d45947986f8aa20763cf99267ec23"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#0b90340ac2dbacb9b4d81e92d9070066">narrow</a> (const std::locale &loc=std::locale()) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the value as a narrow C++ string. <a href="#0b90340ac2dbacb9b4d81e92d9070066"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#af8a69faf2551af5afb4757fd02f631b">operator std::wstring</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the value as a wide C++ string. <a href="#af8a69faf2551af5afb4757fd02f631b"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#61a714a97bb6d70d60be6f9a1997e636">literal</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Retuns whether the string is literal or localized. <a href="#61a714a97bb6d70d60be6f9a1997e636"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">const std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#18807776c41bdaebd7264bbabdd2282a">key</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the key for a localized string. <a href="#18807776c41bdaebd7264bbabdd2282a"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="classWt_1_1WString.html">WString</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#1c3d0d7790282777ce13edececfe0095">arg</a> (const std::wstring &value)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Substitutes the next positional argument with a string value. <a href="#1c3d0d7790282777ce13edececfe0095"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="classWt_1_1WString.html">WString</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#7da2111a8ca361ccd7d77df0232b3986">arg</a> (const std::string &value, <a class="el" href="classWt_1_1WString.html#55b820090cc9d15753301df90e35fd52">CharEncoding</a>=LocalEncoding)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Substitutes the next positional argument with a string value. <a href="#7da2111a8ca361ccd7d77df0232b3986"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="classWt_1_1WString.html">WString</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#4761af728bf3cc5bca4ae3770243883e">arg</a> (const <a class="el" href="classWt_1_1WString.html">WString</a> &value)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Substitutes the next positional argument with a string value. <a href="#4761af728bf3cc5bca4ae3770243883e"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="classWt_1_1WString.html">WString</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#167d99295d497bc37c11893c175e7e02">arg</a> (int value)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Substitutes the next positional argument with an integer value. <a href="#167d99295d497bc37c11893c175e7e02"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="classWt_1_1WString.html">WString</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#adfe619a23256dab80fd238c6e4ad7d7">arg</a> (double value)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Substitutes the next positional argument with a double value. <a href="#adfe619a23256dab80fd238c6e4ad7d7"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">const std::vector< std::string > & </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#59dcc59bd1bc95984f2add4e32e914c0">args</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the list of arguments. <a href="#59dcc59bd1bc95984f2add4e32e914c0"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#545b18b7e07b4596281970ca1599430b">refresh</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Refreshes the string. <a href="#545b18b7e07b4596281970ca1599430b"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#bcdf277c20807ab963effd7e54732fa8">jsStringLiteral</a> (char delimiter= '\'') const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the string as a JavaScript literal. <a href="#bcdf277c20807ab963effd7e54732fa8"></a><br></td></tr>
<tr><td colspan="2"><br><h2>Static Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="el" href="classWt_1_1WString.html">WString</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#17afc7c43b5b7a710047be4a2c639575">fromUTF8</a> (const std::string &value, bool checkValid=false)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Creates a WString from a UTF8 unicode encoded string. <a href="#17afc7c43b5b7a710047be4a2c639575"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="el" href="classWt_1_1WString.html">WString</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#4fbd5cdc92e39411de45acb680b1206b">fromUTF8</a> (const char *value, bool checkValid=false)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Creates a WString from a UTF8 unicode encoded string. <a href="#4fbd5cdc92e39411de45acb680b1206b"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="el" href="classWt_1_1WString.html">WString</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#0afc7dc0f9897456d71b569a86ca26c1">tr</a> (const char *key)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Creates a localized string from a key. <a href="#0afc7dc0f9897456d71b569a86ca26c1"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="el" href="classWt_1_1WString.html">WString</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#42a4aad50b5a1633b1cfef4c0ffa044a">tr</a> (const std::string &key)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Creates a localized string with the specified key. <a href="#42a4aad50b5a1633b1cfef4c0ffa044a"></a><br></td></tr>
<tr><td colspan="2"><br><h2>Static Public Attributes</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="511a12bce677dc733bd7b6b9415bff73"></a><!-- doxytag: member="Wt::WString::Empty" ref="511a12bce677dc733bd7b6b9415bff73" args="" -->
static const <a class="el" href="classWt_1_1WString.html">WString</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#511a12bce677dc733bd7b6b9415bff73">Empty</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">An emtpy string. <br></td></tr>
<tr><td colspan="2"><br><h2>Related Functions</h2></td></tr>
<tr><td colspan="2">(Note that these are not member functions.) <br><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">enum </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#55b820090cc9d15753301df90e35fd52">CharEncoding</a> { <a class="el" href="namespaceWt.html#55b820090cc9d15753301df90e35fd52e31c944a7e88c44611f9317e7c1223e3">LocalEncoding</a>,
<a class="el" href="namespaceWt.html#55b820090cc9d15753301df90e35fd5292c04a55980fec5344377e55b271cfd0">UTF8</a>
}</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Enumeration that indicates a character encoding. <a href="classWt_1_1WString.html#55b820090cc9d15753301df90e35fd52">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef <a class="el" href="classWt_1_1WString.html">WString</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#552bc8e01a4bc1c6ba53607c414a82b7">WMessage</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Alias for WString (<b>deprecated</b>). <a href="#552bc8e01a4bc1c6ba53607c414a82b7"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="8e74a971d0d341af51ffcc77fc4c5f29"></a><!-- doxytag: member="Wt::WString::operator+" ref="8e74a971d0d341af51ffcc77fc4c5f29" args="(const WString &lhs, const WString &rhs)" -->
WT_API <a class="el" href="classWt_1_1WString.html">WString</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#8e74a971d0d341af51ffcc77fc4c5f29">operator+</a> (const <a class="el" href="classWt_1_1WString.html">WString</a> &lhs, const <a class="el" href="classWt_1_1WString.html">WString</a> &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Concatenate two WStrings. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="20e373795a949c805d82cd7793ce0847"></a><!-- doxytag: member="Wt::WString::operator+" ref="20e373795a949c805d82cd7793ce0847" args="(const WString &lhs, const std::wstring &rhs)" -->
WT_API <a class="el" href="classWt_1_1WString.html">WString</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#20e373795a949c805d82cd7793ce0847">operator+</a> (const <a class="el" href="classWt_1_1WString.html">WString</a> &lhs, const std::wstring &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Conatenate a <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a> with a C++ wide string. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="29b92c396a6bdc6703a38c2da0822065"></a><!-- doxytag: member="Wt::WString::operator+" ref="29b92c396a6bdc6703a38c2da0822065" args="(const WString &lhs, const wchar_t *rhs)" -->
WT_API <a class="el" href="classWt_1_1WString.html">WString</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#29b92c396a6bdc6703a38c2da0822065">operator+</a> (const <a class="el" href="classWt_1_1WString.html">WString</a> &lhs, const wchar_t *rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Conatenate a <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a> with a C wide string. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="bf52ea1a14eff4dc0f19fc089c499b58"></a><!-- doxytag: member="Wt::WString::operator+" ref="bf52ea1a14eff4dc0f19fc089c499b58" args="(const WString &lhs, const std::string &rhs)" -->
WT_API <a class="el" href="classWt_1_1WString.html">WString</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#bf52ea1a14eff4dc0f19fc089c499b58">operator+</a> (const <a class="el" href="classWt_1_1WString.html">WString</a> &lhs, const std::string &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Conatenate a WStrin with a C++ string. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="8358446c46d0433f3f080698e271b91f"></a><!-- doxytag: member="Wt::WString::operator+" ref="8358446c46d0433f3f080698e271b91f" args="(const WString &lhs, const char *rhs)" -->
WT_API <a class="el" href="classWt_1_1WString.html">WString</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#8358446c46d0433f3f080698e271b91f">operator+</a> (const <a class="el" href="classWt_1_1WString.html">WString</a> &lhs, const char *rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Conatenate a <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a> with a C string. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="c5c8dce7d5d1e3a9abe13a9d9093fbb2"></a><!-- doxytag: member="Wt::WString::operator+" ref="c5c8dce7d5d1e3a9abe13a9d9093fbb2" args="(const std::wstring &lhs, const WString &rhs)" -->
WT_API <a class="el" href="classWt_1_1WString.html">WString</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#c5c8dce7d5d1e3a9abe13a9d9093fbb2">operator+</a> (const std::wstring &lhs, const <a class="el" href="classWt_1_1WString.html">WString</a> &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Conatenate a C++ wide string with a <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a>. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ec7aea6adc509be52d4852cdad577aa7"></a><!-- doxytag: member="Wt::WString::operator+" ref="ec7aea6adc509be52d4852cdad577aa7" args="(const wchar_t *lhs, const WString &rhs)" -->
WT_API <a class="el" href="classWt_1_1WString.html">WString</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#ec7aea6adc509be52d4852cdad577aa7">operator+</a> (const wchar_t *lhs, const <a class="el" href="classWt_1_1WString.html">WString</a> &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Conatenate a C wide string with a <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a>. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="de2e90e8c1b589d5c7cde214e05953bb"></a><!-- doxytag: member="Wt::WString::operator+" ref="de2e90e8c1b589d5c7cde214e05953bb" args="(const std::string &lhs, const WString &rhs)" -->
WT_API <a class="el" href="classWt_1_1WString.html">WString</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#de2e90e8c1b589d5c7cde214e05953bb">operator+</a> (const std::string &lhs, const <a class="el" href="classWt_1_1WString.html">WString</a> &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Conatenate a C++ string with a <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a>. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="21c7b1899a0c1fefb22cad296605c66b"></a><!-- doxytag: member="Wt::WString::operator+" ref="21c7b1899a0c1fefb22cad296605c66b" args="(const char *lhs, const WString &rhs)" -->
WT_API <a class="el" href="classWt_1_1WString.html">WString</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#21c7b1899a0c1fefb22cad296605c66b">operator+</a> (const char *lhs, const <a class="el" href="classWt_1_1WString.html">WString</a> &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Conatenate a C string with a <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a>. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="902005eafdaa7adc292dfb384feed65f"></a><!-- doxytag: member="Wt::WString::operator==" ref="902005eafdaa7adc292dfb384feed65f" args="(const char *lhs, const WString &rhs)" -->
WT_API bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#902005eafdaa7adc292dfb384feed65f">operator==</a> (const char *lhs, const <a class="el" href="classWt_1_1WString.html">WString</a> &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Compare a C string with a <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a>. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="8b3b3574ae5e0eb9d8a74663a7ef52ad"></a><!-- doxytag: member="Wt::WString::operator==" ref="8b3b3574ae5e0eb9d8a74663a7ef52ad" args="(const wchar_t *lhs, const WString &rhs)" -->
WT_API bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#8b3b3574ae5e0eb9d8a74663a7ef52ad">operator==</a> (const wchar_t *lhs, const <a class="el" href="classWt_1_1WString.html">WString</a> &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Compare a C wide string with a <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a>. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="afe1405efe5edabdb5fa11a2f0891899"></a><!-- doxytag: member="Wt::WString::operator==" ref="afe1405efe5edabdb5fa11a2f0891899" args="(const std::string &lhs, const WString &rhs)" -->
WT_API bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#afe1405efe5edabdb5fa11a2f0891899">operator==</a> (const std::string &lhs, const <a class="el" href="classWt_1_1WString.html">WString</a> &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Compare a C++ string with a <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a>. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="18fa1117aac536af9a3eeaf4a06d33e6"></a><!-- doxytag: member="Wt::WString::operator==" ref="18fa1117aac536af9a3eeaf4a06d33e6" args="(const std::wstring &lhs, const WString &rhs)" -->
WT_API bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#18fa1117aac536af9a3eeaf4a06d33e6">operator==</a> (const std::wstring &lhs, const <a class="el" href="classWt_1_1WString.html">WString</a> &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Compare a C++ wide string with a <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a>. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="5be68db1207e42e9cb78584aada52b7e"></a><!-- doxytag: member="Wt::WString::operator!=" ref="5be68db1207e42e9cb78584aada52b7e" args="(const char *lhs, const WString &rhs)" -->
WT_API bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#5be68db1207e42e9cb78584aada52b7e">operator!=</a> (const char *lhs, const <a class="el" href="classWt_1_1WString.html">WString</a> &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Compare a C string with a <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a>. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="dd2140b578bed246c41705506987ce8d"></a><!-- doxytag: member="Wt::WString::operator!=" ref="dd2140b578bed246c41705506987ce8d" args="(const wchar_t *lhs, const WString &rhs)" -->
WT_API bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#dd2140b578bed246c41705506987ce8d">operator!=</a> (const wchar_t *lhs, const <a class="el" href="classWt_1_1WString.html">WString</a> &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Compare a C wide string with a <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a>. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="39afb0dc0c18f1c4ae9a1c36fd061722"></a><!-- doxytag: member="Wt::WString::operator!=" ref="39afb0dc0c18f1c4ae9a1c36fd061722" args="(const std::string &lhs, const WString &rhs)" -->
WT_API bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#39afb0dc0c18f1c4ae9a1c36fd061722">operator!=</a> (const std::string &lhs, const <a class="el" href="classWt_1_1WString.html">WString</a> &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Compare a C++ string with a <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a>. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="4bbceb2c54d45a3b0b6bc55d15a17dba"></a><!-- doxytag: member="Wt::WString::operator!=" ref="4bbceb2c54d45a3b0b6bc55d15a17dba" args="(const std::wstring &lhs, const WString &rhs)" -->
WT_API bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#4bbceb2c54d45a3b0b6bc55d15a17dba">operator!=</a> (const std::wstring &lhs, const <a class="el" href="classWt_1_1WString.html">WString</a> &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Compare a C++ wide string with a <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a>. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="82f539b8c205675c9c9f4d5d42cc9c57"></a><!-- doxytag: member="Wt::WString::operator<<" ref="82f539b8c205675c9c9f4d5d42cc9c57" args="(std::wostream &lhs, const WString &rhs)" -->
WT_API std::wostream & </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#82f539b8c205675c9c9f4d5d42cc9c57">operator<<</a> (std::wostream &lhs, const <a class="el" href="classWt_1_1WString.html">WString</a> &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Output a <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a> to a C++ wide stream. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">WT_API std::ostream & </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#5175831fb21a4e6245bfde54c5aaa3d2">operator<<</a> (std::ostream &lhs, const <a class="el" href="classWt_1_1WString.html">WString</a> &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Output a <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a> to a C++ stream. <a href="#5175831fb21a4e6245bfde54c5aaa3d2"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">WT_API std::wstring </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#0de7f8ee205f8a3368d6428e4b474f11">widen</a> (const std::string &s, const std::locale &loc=std::locale())</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Convert a narrow to a wide string. <a href="#0de7f8ee205f8a3368d6428e4b474f11"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">WT_API std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#2986eba78638de302685abc4f8e694d0">narrow</a> (const std::wstring &s, const std::locale &loc=std::locale())</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Convert a wide to a narrow string. <a href="#2986eba78638de302685abc4f8e694d0"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">WT_API std::wstring </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#a5e236feac365794b288fd04a461406b">fromUTF8</a> (const std::string &s)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Decode a UTF8 string a wide string. <a href="#a5e236feac365794b288fd04a461406b"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">WT_API std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WString.html#32dae81c17e873b041a85a8509c905a5">toUTF8</a> (const std::wstring &s)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Encode a wide string to UTF8. <a href="#32dae81c17e873b041a85a8509c905a5"></a><br></td></tr>
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<hr><a name="_details"></a><h2>Detailed Description</h2>
A unicode string class, with support for localization.
<p>
Wt offers this string to facilitate handling of unicode text through the user interface, and to offer support for localized text using message resource bundles.<p>
A WString may be constructed from a std::string, std::wstring or c-style strings (const char * and const wchar_t *), and converted to each of these strings taking into account the locale in which the Wt application runs on the web server. Independent of the locale on the web server, you may convert from and to UTF8 unicode encoded std::strings.<p>
By using the static functions <a class="el" href="classWt_1_1WString.html#0afc7dc0f9897456d71b569a86ca26c1" title="Creates a localized string from a key.">WString::tr()</a> (or <a class="el" href="classWt_1_1WWidget.html#a651f107ec7cf080faef6c435705fc44" title="Short hand for WString::tr().">WWidget::tr()</a>), one may construct a localized string. The key is used to retrieve its current value from the application's message-resource bundles.<p>
Argument place holder in a string, denoted using {<em>n</em>} for the <em>n</em>'th argument, may be substituted by values set using <a class="el" href="classWt_1_1WString.html#167d99295d497bc37c11893c175e7e02" title="Substitutes the next positional argument with an integer value.">arg(int)</a> and arg(std::string).<p>
WString is used by all built-in widgets for displayed text. By calling <a class="el" href="classWt_1_1WApplication.html#5c9cc1350019d69f154a2b44cdaf2596" title="Changes the locale.">WApplication::setLocale()</a> or <a class="el" href="classWt_1_1WApplication.html#02b9d8aa1b6c2d0dc9edc1b9c63f86dc" title="Refreshes the application.">WApplication::refresh()</a>, the contents of every WString is reevaluated in the new locale, by calling <a class="el" href="classWt_1_1WString.html#545b18b7e07b4596281970ca1599430b" title="Refreshes the string.">refresh()</a>. In this way, the contents of the whole user interface is adapted to a possibly changed locale.<p>
To benefit from the localization properties of WString, you should design your own widget classes to use WString in their interface for any text that is displayed. In this way, your own widgets will automatically, and without any extra effort, participate in a relocalization triggered by <a class="el" href="classWt_1_1WApplication.html#5c9cc1350019d69f154a2b44cdaf2596" title="Changes the locale.">WApplication::setLocale()</a>.<p>
This string class does not provide anything more than basic manipulations. Instead, you should convert to a standard library string class to manipulate the string contents and perform string algorithms on them. In particular, we recommend to use the conversion methods <a class="el" href="classWt_1_1WString.html#159d088da6e8f2be1035b2341889254c" title="Returns the value as a UTF8 unicode encoded string.">toUTF8()</a>, <a class="el" href="classWt_1_1WString.html#17afc7c43b5b7a710047be4a2c639575" title="Creates a WString from a UTF8 unicode encoded string.">fromUTF8()</a> and the <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a>(..., <a class="el" href="namespaceWt.html#55b820090cc9d15753301df90e35fd5292c04a55980fec5344377e55b271cfd0">UTF8</a>) constructor to convert from and to UTF8 encoded std::strings. In this way, you can support the whole unicode character set, with backward compatible support for the standard 7-bit ASCII set. Since WString internally uses UTF8-encoding, and UTF8-encoding is used by the library for communication with the browser, there is no actual conversion overhead. Only when you need to run string algorithms that require the actual length of the string in number of characters, you would need to convert to a wide string representation such as std::wstring.<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WApplication.html#5386565e35a58c94ccbbfab48f2212a4" title="Returns the message resource bundle.">WApplication::messageResourceBundle()</a> <p>
<a class="el" href="classWt_1_1WApplication.html#6e782f1f38a6f56e2024aab1a917a80b" title="Returns the current locale.">WApplication::locale()</a> </dd></dl>
<hr><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" name="b1118313feb49fd2a1f7eab40f7f7a56"></a><!-- doxytag: member="Wt::WString::WString" ref="b1118313feb49fd2a1f7eab40f7f7a56" args="()" -->
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<p>
Creates an empty string.
<p>
Create a literal string with empty contents ("").
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<p>
Creates a WString from a wide C string.
<p>
The wide string is implicitly converted to proper unicode. Note that there are known issues with the portability of wchar_t since its width and encoding are platform dependent.
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<a class="anchor" name="217c6be8205e02d3e2580b6c59357bb6"></a><!-- doxytag: member="Wt::WString::WString" ref="217c6be8205e02d3e2580b6c59357bb6" args="(const std::wstring &value)" -->
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<p>
Creates a WString from a wide C++ string.
<p>
The wide string is implicitly converted to proper unicode. Note that there are known issues with the portability of wchar_t since its width and encoding are platform dependent.
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<a class="anchor" name="a1e577f4cf6352a3a657fde3f7d3034e"></a><!-- doxytag: member="Wt::WString::WString" ref="a1e577f4cf6352a3a657fde3f7d3034e" args="(const char *value, CharEncoding encoding=LocalEncoding)" -->
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<td class="paramtype"><a class="el" href="classWt_1_1WString.html#55b820090cc9d15753301df90e35fd52">CharEncoding</a> </td>
<td class="paramname"> <em>encoding</em> = <code>LocalEncoding</code></td><td> </td>
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<p>
Creates a WString from a C string.
<p>
The C string is implicitly converted to unicode. When <code>encoding</code> is <a class="el" href="namespaceWt.html#55b820090cc9d15753301df90e35fd52e31c944a7e88c44611f9317e7c1223e3">LocalEncoding</a>, the current locale is used to interpret the C string. When encoding is <a class="el" href="namespaceWt.html#55b820090cc9d15753301df90e35fd5292c04a55980fec5344377e55b271cfd0">UTF8</a>, the C string is interpreted as a UTF8 encoded unicode string.
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<a class="anchor" name="d2b612d535553feb1e4d08347f5475b1"></a><!-- doxytag: member="Wt::WString::WString" ref="d2b612d535553feb1e4d08347f5475b1" args="(const char *value, const std::locale &loc)" -->
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<p>
Creates a WString from a C string.
<p>
The C string is implicitly converted to unicode. The string is interpreted within the character set of the given locale.
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<a class="anchor" name="65df74efecfae4e46c68fe3ff28ff81d"></a><!-- doxytag: member="Wt::WString::WString" ref="65df74efecfae4e46c68fe3ff28ff81d" args="(const std::string &value, CharEncoding encoding=LocalEncoding)" -->
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<td class="paramname"> <em>encoding</em> = <code>LocalEncoding</code></td><td> </td>
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Creates a WString from a C++ string.
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The C++ string is implicitly converted to unicode. When <code>encoding</code> is <a class="el" href="namespaceWt.html#55b820090cc9d15753301df90e35fd52e31c944a7e88c44611f9317e7c1223e3">LocalEncoding</a>, the current locale is used to interpret the C++ string. When encoding is <a class="el" href="namespaceWt.html#55b820090cc9d15753301df90e35fd5292c04a55980fec5344377e55b271cfd0">UTF8</a>, the C++ string is interpreted as a UTF8 encoded unicode string.
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Creates a WString from a C++ string.
<p>
The C++ string is implicitly converted to unicode. The string is interpreted within the character set of the given locale.
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<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="fbd9254fb159d682ed4a2227a7ec69b7"></a><!-- doxytag: member="Wt::WString::operator=" ref="fbd9254fb159d682ed4a2227a7ec69b7" args="(const WString &rhs)" -->
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Assignment operator.
<p>
Copy another string into this string.
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Comparison operator.
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Compares to strings and returns <code>true</code> if the strings are exactly the same. This may require evaluating a localized string in the current locale.
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Comparison operator.
<p>
Compares to strings lexicographically. This may require evaluating a localized string in the current locale. The unicode representation of the strings are compared.
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<p>
Comparison operator.
<p>
Compares to strings lexicographically. This may require evaluating a localized string in the current locale. The unicode representation of the strings are compared.
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<p>
Self-concatenation operator.
<p>
Appends a string to the current value. If the string was localized, this automatically converts it to a literal string, by evaluating the string using the current locale.
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<a class="anchor" name="0c455e324e5e756c456cd662f829373c"></a><!-- doxytag: member="Wt::WString::operator+=" ref="0c455e324e5e756c456cd662f829373c" args="(const std::wstring &rhs)" -->
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<td class="memname"><a class="el" href="classWt_1_1WString.html">WString</a> & Wt::WString::operator+= </td>
<td>(</td>
<td class="paramtype">const std::wstring & </td>
<td class="paramname"> <em>rhs</em> </td>
<td> ) </td>
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<div class="memdoc">
<p>
Self-concatenation operator.
<p>
Appends a string to the current value. If the string was localized, this automatically converts it to a literal string, by evaluating the string using the current locale.
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<a class="anchor" name="64bbf435dfe82342ce43faf9c48ee28f"></a><!-- doxytag: member="Wt::WString::operator+=" ref="64bbf435dfe82342ce43faf9c48ee28f" args="(const wchar_t *rhs)" -->
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<td>(</td>
<td class="paramtype">const wchar_t * </td>
<td class="paramname"> <em>rhs</em> </td>
<td> ) </td>
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<div class="memdoc">
<p>
Self-concatenation operator.
<p>
Appends a string to the current value. If the string was localized, this automatically converts it to a literal string, by evaluating the string using the current locale.
</div>
</div><p>
<a class="anchor" name="36d097b2ed9a2e921ad2d6a79bc3dd25"></a><!-- doxytag: member="Wt::WString::operator+=" ref="36d097b2ed9a2e921ad2d6a79bc3dd25" args="(const std::string &rhs)" -->
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<td class="memname"><a class="el" href="classWt_1_1WString.html">WString</a> & Wt::WString::operator+= </td>
<td>(</td>
<td class="paramtype">const std::string & </td>
<td class="paramname"> <em>rhs</em> </td>
<td> ) </td>
<td></td>
</tr>
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<div class="memdoc">
<p>
Self-concatenation operator.
<p>
Appends a string to the current value. The right hand side is interpreted in the server locale and converted to unicode. If the string was localized, this automatically converts it to a literal string, by evaluating the string using the current locale.
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</div><p>
<a class="anchor" name="cac4b0bc682e0789edc2976883ed7a5a"></a><!-- doxytag: member="Wt::WString::operator+=" ref="cac4b0bc682e0789edc2976883ed7a5a" args="(const char *rhs)" -->
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<td class="memname"><a class="el" href="classWt_1_1WString.html">WString</a> & Wt::WString::operator+= </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>rhs</em> </td>
<td> ) </td>
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</tr>
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<div class="memdoc">
<p>
Self-concatenation operator.
<p>
Appends a string to the current value. The right hand side is interpreted in the server locale and converted to unicode. If the string was localized, this automatically converts it to a literal string, by evaluating the string using the current locale.
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<a class="anchor" name="17afc7c43b5b7a710047be4a2c639575"></a><!-- doxytag: member="Wt::WString::fromUTF8" ref="17afc7c43b5b7a710047be4a2c639575" args="(const std::string &value, bool checkValid=false)" -->
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<td class="memname"><a class="el" href="classWt_1_1WString.html">WString</a> Wt::WString::fromUTF8 </td>
<td>(</td>
<td class="paramtype">const std::string & </td>
<td class="paramname"> <em>value</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">bool </td>
<td class="paramname"> <em>checkValid</em> = <code>false</code></td><td> </td>
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<td>)</td>
<td></td><td></td><td><code> [static]</code></td>
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<p>
Creates a WString from a UTF8 unicode encoded string.
<p>
This is equivalent to using the constructor <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a>(<code>value</code>, UTF8).<p>
When <code>checkValid</code> is <code>true</code>, the UTF8 encoding is validated. You should enable this only if you cannot trust the origin of the string. The library uses this internally whenever it receives data from the browser (in UTF-8 format).
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<td class="memname"><a class="el" href="classWt_1_1WString.html">WString</a> Wt::WString::fromUTF8 </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>value</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">bool </td>
<td class="paramname"> <em>checkValid</em> = <code>false</code></td><td> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td><td><code> [static]</code></td>
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<p>
Creates a WString from a UTF8 unicode encoded string.
<p>
This is equivalent to using the constructor <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a>(<code>value</code>, UTF8).<p>
When <code>checkValid</code> is <code>true</code>, the UTF8 encoding is validated. You should enable this only if you cannot trust the origin of the string. The library uses this internally whenever it receives data from the browser (in UTF-8 format).
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<td class="memname">std::string Wt::WString::toUTF8 </td>
<td>(</td>
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<td> const</td>
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<p>
Returns the value as a UTF8 unicode encoded string.
<p>
For a localized string, returns the current localized value.<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WString.html#17afc7c43b5b7a710047be4a2c639575" title="Creates a WString from a UTF8 unicode encoded string.">fromUTF8()</a> </dd></dl>
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<a class="anchor" name="0afc7dc0f9897456d71b569a86ca26c1"></a><!-- doxytag: member="Wt::WString::tr" ref="0afc7dc0f9897456d71b569a86ca26c1" args="(const char *key)" -->
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<td class="memname"><a class="el" href="classWt_1_1WString.html">WString</a> Wt::WString::tr </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>key</em> </td>
<td> ) </td>
<td><code> [static]</code></td>
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<p>
Creates a localized string from a key.
<p>
Whenever the value of the string is needed, the key is used for a lookup in the application message resource bundles taking into account the current application locale. If the key cannot be resolved, its value is set to '??key??'.<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WApplication.html#5386565e35a58c94ccbbfab48f2212a4" title="Returns the message resource bundle.">WApplication::messageResourceBundle()</a>, <a class="el" href="classWt_1_1WApplication.html#6e782f1f38a6f56e2024aab1a917a80b" title="Returns the current locale.">WApplication::locale()</a>, <a class="el" href="classWt_1_1WApplication.html#a140cb3c65451413939010d704e9a58a" title="Returns the resource object that provides localized strings.">WApplication::localizedStrings()</a> </dd></dl>
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<td class="memname"><a class="el" href="classWt_1_1WString.html">WString</a> Wt::WString::tr </td>
<td>(</td>
<td class="paramtype">const std::string & </td>
<td class="paramname"> <em>key</em> </td>
<td> ) </td>
<td><code> [static]</code></td>
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<p>
Creates a localized string with the specified key.
<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WString.html#0afc7dc0f9897456d71b569a86ca26c1" title="Creates a localized string from a key.">tr(const char *)</a> </dd></dl>
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<a class="anchor" name="b76d45947986f8aa20763cf99267ec23"></a><!-- doxytag: member="Wt::WString::value" ref="b76d45947986f8aa20763cf99267ec23" args="() const " -->
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<td class="memname">std::wstring Wt::WString::value </td>
<td>(</td>
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<td> const</td>
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<p>
Returns the value as a wide C++ string.
<p>
A localized string is resolved using the <a class="el" href="classWt_1_1WApplication.html#a140cb3c65451413939010d704e9a58a" title="Returns the resource object that provides localized strings.">WApplication::localizedStrings()</a>.<p>
Argument place holders are substitued with actual arguments.
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<a class="anchor" name="0b90340ac2dbacb9b4d81e92d9070066"></a><!-- doxytag: member="Wt::WString::narrow" ref="0b90340ac2dbacb9b4d81e92d9070066" args="(const std::locale &loc=std::locale()) const " -->
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<td class="memname">std::string Wt::WString::narrow </td>
<td>(</td>
<td class="paramtype">const std::locale & </td>
<td class="paramname"> <em>loc</em> = <code>std::locale()</code> </td>
<td> ) </td>
<td> const</td>
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<p>
Returns the value as a narrow C++ string.
<p>
A localized string is resolved using the <a class="el" href="classWt_1_1WApplication.html#a140cb3c65451413939010d704e9a58a" title="Returns the resource object that provides localized strings.">WApplication::localizedStrings()</a>.<p>
Argument place holders are substitued with actual arguments.<p>
Any wide character is narrowed using the provided locale, possibly losing information. If you wish to keep all information, use <a class="el" href="classWt_1_1WString.html#159d088da6e8f2be1035b2341889254c" title="Returns the value as a UTF8 unicode encoded string.">toUTF8()</a> instead, which encodes wide characters in the string.<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WString.html#159d088da6e8f2be1035b2341889254c" title="Returns the value as a UTF8 unicode encoded string.">toUTF8()</a> </dd></dl>
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<a class="anchor" name="af8a69faf2551af5afb4757fd02f631b"></a><!-- doxytag: member="Wt::WString::operator std::wstring" ref="af8a69faf2551af5afb4757fd02f631b" args="() const " -->
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<td class="memname">Wt::WString::operator std::wstring </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td> const</td>
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<div class="memdoc">
<p>
Returns the value as a wide C++ string.
<p>
A localized string is resolved using the <a class="el" href="classWt_1_1WApplication.html#a140cb3c65451413939010d704e9a58a" title="Returns the resource object that provides localized strings.">WApplication::localizedStrings()</a>.<p>
Argument place holders are substitued with actual arguments.
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<a class="anchor" name="61a714a97bb6d70d60be6f9a1997e636"></a><!-- doxytag: member="Wt::WString::literal" ref="61a714a97bb6d70d60be6f9a1997e636" args="() const " -->
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<td class="memname">bool Wt::WString::literal </td>
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<td> const<code> [inline]</code></td>
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<p>
Retuns whether the string is literal or localized.
<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WString.html#0afc7dc0f9897456d71b569a86ca26c1" title="Creates a localized string from a key.">tr()</a> </dd></dl>
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<a class="anchor" name="18807776c41bdaebd7264bbabdd2282a"></a><!-- doxytag: member="Wt::WString::key" ref="18807776c41bdaebd7264bbabdd2282a" args="() const " -->
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<td class="memname">const std::string Wt::WString::key </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td> const</td>
</tr>
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</div>
<div class="memdoc">
<p>
Returns the key for a localized string.
<p>
When the string is literal, the result is undefined.
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<td class="memname"><a class="el" href="classWt_1_1WString.html">WString</a> & Wt::WString::arg </td>
<td>(</td>
<td class="paramtype">const std::wstring & </td>
<td class="paramname"> <em>value</em> </td>
<td> ) </td>
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<p>
Substitutes the next positional argument with a string value.
<p>
In the string, the <code>n-th</code> argument is referred to as using {<code>n}</code>.<p>
For example: the string "<code>{1} bought {2} apples in the shop.</code>" with first argument value "<code>Bart</code>" and second argument value <code>5</code> becomes: "<code>Bart bought 5 apples in the shop.</code>"
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<td class="memname"><a class="el" href="classWt_1_1WString.html">WString</a> & Wt::WString::arg </td>
<td>(</td>
<td class="paramtype">const std::string & </td>
<td class="paramname"> <em>value</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classWt_1_1WString.html#55b820090cc9d15753301df90e35fd52">CharEncoding</a> </td>
<td class="paramname"> <em>encoding</em> = <code>LocalEncoding</code></td><td> </td>
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<td>)</td>
<td></td><td></td><td></td>
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<div class="memdoc">
<p>
Substitutes the next positional argument with a string value.
<p>
In the string, the <code>n-th</code> argument is referred to as using {<code>n}</code>.<p>
For example: the string "<code>{1} bought {2} apples in the shop.</code>" with first argument value "<code>Bart</code>" and second argument value <code>5</code> becomes: "<code>Bart bought 5 apples in the shop.</code>"
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<td class="memname"><a class="el" href="classWt_1_1WString.html">WString</a> & Wt::WString::arg </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classWt_1_1WString.html">WString</a> & </td>
<td class="paramname"> <em>value</em> </td>
<td> ) </td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Substitutes the next positional argument with a string value.
<p>
In the string, the <code>n-th</code> argument is referred to as using {<code>n}</code>.<p>
For example: the string "<code>{1} bought {2} apples in the shop.</code>" with first argument value "<code>Bart</code>" and second argument value <code>5</code> becomes: "<code>Bart bought 5 apples in the shop.</code>"
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<a class="anchor" name="167d99295d497bc37c11893c175e7e02"></a><!-- doxytag: member="Wt::WString::arg" ref="167d99295d497bc37c11893c175e7e02" args="(int value)" -->
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<td class="memname"><a class="el" href="classWt_1_1WString.html">WString</a> & Wt::WString::arg </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"> <em>value</em> </td>
<td> ) </td>
<td></td>
</tr>
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<div class="memdoc">
<p>
Substitutes the next positional argument with an integer value.
<p>
In the string, the <code>n-th</code> argument is reffered to as using {<code>n}</code>.<p>
For example: the string "<code>{1} bought {2} apples in the shop.</code>" with first argument value "<code>Bart</code>" and second argument value <code>5</code> becomes: "<code>Bart bought 5 apples in the shop.</code>"
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<a class="anchor" name="adfe619a23256dab80fd238c6e4ad7d7"></a><!-- doxytag: member="Wt::WString::arg" ref="adfe619a23256dab80fd238c6e4ad7d7" args="(double value)" -->
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<td class="memname"><a class="el" href="classWt_1_1WString.html">WString</a> & Wt::WString::arg </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>value</em> </td>
<td> ) </td>
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<p>
Substitutes the next positional argument with a double value.
<p>
In the string, the <code>n-th</code> argument is reffered to as using {<code>n}</code>.<p>
For example: the string "<code>{1} bought {2} apples in the shop.</code>" with first argument value "<code>Bart</code>" and second argument value <code>5</code> becomes: "<code>Bart bought 5 apples in the shop.</code>"
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<a class="anchor" name="59dcc59bd1bc95984f2add4e32e914c0"></a><!-- doxytag: member="Wt::WString::args" ref="59dcc59bd1bc95984f2add4e32e914c0" args="() const " -->
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<td class="memname">const std::vector< std::string > & Wt::WString::args </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td> const</td>
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<p>
Returns the list of arguments.
<p>
Each argument is UTF8 encoded.
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<a class="anchor" name="545b18b7e07b4596281970ca1599430b"></a><!-- doxytag: member="Wt::WString::refresh" ref="545b18b7e07b4596281970ca1599430b" args="()" -->
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<td></td>
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<p>
Refreshes the string.
<p>
For a localized string, its value is resolved again.<p>
Returns whether the value has (potentially) changed.
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</div><p>
<a class="anchor" name="bcdf277c20807ab963effd7e54732fa8"></a><!-- doxytag: member="Wt::WString::jsStringLiteral" ref="bcdf277c20807ab963effd7e54732fa8" args="(char delimiter= '\'') const " -->
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<td>(</td>
<td class="paramtype">char </td>
<td class="paramname"> <em>delimiter</em> = <code>'\''</code> </td>
<td> ) </td>
<td> const</td>
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</table>
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<p>
Returns the string as a JavaScript literal.
<p>
The <code>delimiter</code> may be a single or double quote.<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WWebWidget.html#f9dc9dcb0eb0ba2d740645c9908694d0" title="Turn a UTF8 encoded string into a JavaScript string literal.">WWebWidget::jsStringLiteral()</a> </dd></dl>
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<hr><h2>Friends And Related Function Documentation</h2>
<a class="anchor" name="55b820090cc9d15753301df90e35fd52"></a><!-- doxytag: member="Wt::WString::CharEncoding" ref="55b820090cc9d15753301df90e35fd52" args="" -->
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<td class="memname">enum <a class="el" href="classWt_1_1WString.html#55b820090cc9d15753301df90e35fd52">CharEncoding</a><code> [related]</code> </td>
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<p>
Enumeration that indicates a character encoding.
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Character encodings are used to represent characters in a stream of bytes. <dl compact><dt><b>Enumerator: </b></dt><dd>
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<tr><td valign="top"><em><a class="anchor" name="55b820090cc9d15753301df90e35fd52e31c944a7e88c44611f9317e7c1223e3"></a><!-- doxytag: member="LocalEncoding" ref="55b820090cc9d15753301df90e35fd52e31c944a7e88c44611f9317e7c1223e3" args="" -->LocalEncoding</em> </td><td>
Each byte represents a character, using the local server-side system locale. </td></tr>
<tr><td valign="top"><em><a class="anchor" name="55b820090cc9d15753301df90e35fd5292c04a55980fec5344377e55b271cfd0"></a><!-- doxytag: member="UTF8" ref="55b820090cc9d15753301df90e35fd5292c04a55980fec5344377e55b271cfd0" args="" -->UTF8</em> </td><td>
The byte stream represents unicode characters encoded using UTF-8. </td></tr>
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<a class="anchor" name="552bc8e01a4bc1c6ba53607c414a82b7"></a><!-- doxytag: member="Wt::WString::WMessage" ref="552bc8e01a4bc1c6ba53607c414a82b7" args="" -->
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<td class="memname">typedef <a class="el" href="classWt_1_1WString.html">WString</a> <a class="el" href="classWt_1_1WString.html">WMessage</a><code> [related]</code> </td>
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Alias for WString (<b>deprecated</b>).
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<dl compact><dt><b><a class="el" href="deprecated.html#_deprecated000019">Deprecated:</a></b></dt><dd>use <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a> instead.</dd></dl>
WString provides all the functionality of the now deprecated WMessage, but is used more consistently through the API.
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<a class="anchor" name="5175831fb21a4e6245bfde54c5aaa3d2"></a><!-- doxytag: member="Wt::WString::operator<<" ref="5175831fb21a4e6245bfde54c5aaa3d2" args="(std::ostream &lhs, const WString &rhs)" -->
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<td class="memname">WT_API std::ostream & operator<< </td>
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<td class="paramname"> <em>rhs</em></td><td> </td>
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Output a <a class="el" href="classWt_1_1WString.html" title="A unicode string class, with support for localization.">WString</a> to a C++ stream.
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The string is narrowed using the currently global C++ locale, possibly losing information.
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<a class="anchor" name="0de7f8ee205f8a3368d6428e4b474f11"></a><!-- doxytag: member="Wt::WString::widen" ref="0de7f8ee205f8a3368d6428e4b474f11" args="(const std::string &s, const std::locale &loc=std::locale())" -->
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<td class="memname">WT_API std::wstring widen </td>
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Convert a narrow to a wide string.
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Convert a narrow string to a wide string. This method will interpret the input string as being encoded in the given locale (by default the currently configured global C++ locale).<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd>narrow(const std::wstring&), <a class="el" href="classWt_1_1WString.html#a5e236feac365794b288fd04a461406b" title="Decode a UTF8 string a wide string.">fromUTF8(const std::string& s)</a> </dd></dl>
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<a class="anchor" name="2986eba78638de302685abc4f8e694d0"></a><!-- doxytag: member="Wt::WString::narrow" ref="2986eba78638de302685abc4f8e694d0" args="(const std::wstring &s, const std::locale &loc=std::locale())" -->
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<td class="memname">WT_API std::string narrow </td>
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Convert a wide to a narrow string.
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Convert a wide string to a narrow string. This method will encode the characters in the given locale, if possible.<p>
In general this will lead to a loss of information. If you wish to preserve all information, you should us <a class="el" href="classWt_1_1WString.html#159d088da6e8f2be1035b2341889254c" title="Returns the value as a UTF8 unicode encoded string.">toUTF8()</a> instead.<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd>widen(const std::string&), <a class="el" href="classWt_1_1WString.html#32dae81c17e873b041a85a8509c905a5" title="Encode a wide string to UTF8.">toUTF8(const std::wstring& s)</a> </dd></dl>
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<a class="anchor" name="a5e236feac365794b288fd04a461406b"></a><!-- doxytag: member="Wt::WString::fromUTF8" ref="a5e236feac365794b288fd04a461406b" args="(const std::string &s)" -->
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<td class="memname">WT_API std::wstring fromUTF8 </td>
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Decode a UTF8 string a wide string.
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Decode a UTF8 string to a wide string. In a UTF8 encoded unicode string, some unicode characters are represented in more than one byte. This method will decode to extract the proper unicode characters from the string. The resulting string may thus be shorter (has less characters) than the original, but does not lead to a loss of information.<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd>toUTF8(const std::string& s), narrow(const std::wstring&) </dd></dl>
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<a class="anchor" name="32dae81c17e873b041a85a8509c905a5"></a><!-- doxytag: member="Wt::WString::toUTF8" ref="32dae81c17e873b041a85a8509c905a5" args="(const std::wstring &s)" -->
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Encode a wide string to UTF8.
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Convert a wide string to UTF8. This method will encode the given wide string in UTF8. This may result in a string that is possibly longer (has more characters), but does not lead to a loss of information.<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WString.html#a5e236feac365794b288fd04a461406b" title="Decode a UTF8 string a wide string.">fromUTF8(const std::string& s)</a>, narrow(const std::wstring&) </dd></dl>
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