<?xml version="1.0" encoding="utf-8" ?> <!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" xml:lang="en" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="generator" content="Docutils 0.7: http://docutils.sourceforge.net/" /> <title>The MPL Reference Manual: string</title> <link rel="stylesheet" href="../style.css" type="text/css" /> </head> <body class="docframe refmanual"> <table class="header"><tr class="header"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./set-c.html" class="navigation-link">Prev</a> <a href="./views.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./set-c.html" class="navigation-link">Back</a> Along</span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./classes.html" class="navigation-link">Up</a> <a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td> <td class="header-group page-location"><a href="../refmanual.html" class="navigation-link">Front Page</a> / <a href="./sequences.html" class="navigation-link">Sequences</a> / <a href="./classes.html" class="navigation-link">Classes</a> / <a href="./string.html" class="navigation-link">string</a></td> </tr></table><div class="header-separator"></div> <div class="section" id="string"> <h1><a class="toc-backref" href="./classes.html#id1415">string</a></h1> <div class="section" id="id112"> <h3><a class="subsection-title" href="#description" name="description">Description</a></h3> <p><tt class="literal"><span class="pre"><a href="./string.html" class="identifier">string</a></span></tt> is a <a class="reference internal" href="./variadic-sequence.html">variadic</a>, <a class="reference internal" href="./bidirectional-sequence.html">bidirectional</a>, <a class="reference internal" href="./extensible-sequence.html">extensible</a> <a class="reference internal" href="./integral-sequence-wrapper.html">Integral Sequence Wrapper</a> of characters that supports amortized constant-time insertion and removal of elements at both ends, and linear-time insertion and removal of elements in the middle. The parameters to <tt class="literal"><span class="pre"><a href="./string.html" class="identifier">string</a></span></tt> are multi-character literals, giving a somewhat readable syntax for compile-time strings. <tt class="literal"><span class="pre"><a href="./string.html" class="identifier">string</a></span></tt> can also be an argument to the <tt class="literal"><span class="pre"><a href="./c-str.html" class="identifier">c_str</a></span></tt> metafunction, which generates a null-terminated character array that facilitates interoperability with runtime string processing routines.</p> </div> <div class="section" id="id115"> <h3><a class="subsection-title" href="#header" name="header">Header</a></h3> <table border="1" class="docutils table"> <colgroup> <col width="26%" /> <col width="74%" /> </colgroup> <thead valign="bottom"> <tr><th class="head">Sequence form</th> <th class="head">Header</th> </tr> </thead> <tbody valign="top"> <tr><td>Variadic</td> <td><tt class="literal"><span class="pre">#include <<a href="../../../../boost/mpl/string.hpp" class="header">boost/mpl/string.hpp</a>></span></tt></td> </tr> </tbody> </table> </div> <div class="section" id="id116"> <h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3> <ul class="simple"> <li><a class="reference internal" href="./integral-sequence-wrapper.html">Integral Sequence Wrapper</a></li> <li><a class="reference internal" href="./variadic-sequence.html">Variadic Sequence</a></li> <li><a class="reference internal" href="./bidirectional-sequence.html">Bidirectional Sequence</a></li> <li><a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a></li> <li><a class="reference internal" href="./back-extensible-sequence.html">Back Extensible Sequence</a></li> <li><a class="reference internal" href="./front-extensible-sequence.html">Front Extensible Sequence</a></li> </ul> </div> <div class="section" id="id117"> <h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3> <p>In the following table, <tt class="literal"><span class="pre">s</span></tt> is an instance of <tt class="literal"><span class="pre"><a href="./string.html" class="identifier">string</a></span></tt>, <tt class="literal"><span class="pre">pos</span></tt> and <tt class="literal"><span class="pre">last</span></tt> are iterators into <tt class="literal"><span class="pre">s</span></tt>, <tt class="literal"><span class="pre">r</span></tt> is a <a class="reference internal" href="./forward-sequence.html">Forward Sequence</a> of characters, <tt class="literal"><span class="pre">n</span></tt> and <tt class="literal"><span class="pre">x</span></tt> are <a class="reference internal" href="./integral-constant.html">Integral Constant</a>s, and <em>c</em><sub>1</sub>,<em>c</em><sub>2</sub>,... <em>c</em><sub>n</sub> are arbitrary (multi-)characters.</p> <table border="1" class="docutils table"> <colgroup> <col width="40%" /> <col width="60%" /> </colgroup> <thead valign="bottom"> <tr><th class="head">Expression</th> <th class="head">Semantics</th> </tr> </thead> <tbody valign="top"> <tr><td><pre class="first last literal-block"> <a href="./string.html" class="identifier">string</a><<em>c</em><sub>1</sub>,<em>c</em><sub>2</sub>,... <em>c</em><sub>n</sub>> </pre> </td> <td><tt class="literal"><span class="pre"><a href="./string.html" class="identifier">string</a></span></tt> of characters <em>c</em><sub>1</sub>,<em>c</em><sub>2</sub>,... <em>c</em><sub>n</sub>; see <a class="reference internal" href="./variadic-sequence.html">Variadic Sequence</a>.</td> </tr> <tr><td><pre class="first last literal-block"> <a href="./string.html" class="identifier">string</a><<em>c</em><sub>1</sub>,<em>c</em><sub>2</sub>,... <em>c</em><sub>n</sub>>::type </pre> </td> <td>Identical to <tt class="literal"><span class="pre"><a href="./string.html" class="identifier">string</a><</span></tt><em>c</em><sub>1</sub>,<em>c</em><sub>2</sub>,... <em>c</em><sub>n</sub><tt class="literal"><span class="pre">></span></tt>; see <a class="reference internal" href="./variadic-sequence.html">Variadic Sequence</a>.</td> </tr> <tr><td><tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a><s>::type</span></tt></td> <td>An iterator pointing to the beginning of <tt class="literal"><span class="pre">s</span></tt>; see <a class="reference internal" href="./bidirectional-sequence.html">Bidirectional Sequence</a>.</td> </tr> <tr><td><tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><s>::type</span></tt></td> <td>An iterator pointing to the end of <tt class="literal"><span class="pre">s</span></tt>; see <a class="reference internal" href="./bidirectional-sequence.html">Bidirectional Sequence</a>.</td> </tr> <tr><td><tt class="literal"><span class="pre"><a href="./size.html" class="identifier">size</a><s>::type</span></tt></td> <td>The size of <tt class="literal"><span class="pre">s</span></tt>; see <a class="reference internal" href="./bidirectional-sequence.html">Bidirectional Sequence</a>.</td> </tr> <tr><td><tt class="literal"><span class="pre"><a href="./empty.html" class="identifier">empty</a><s>::type</span></tt></td> <td>A boolean <a class="reference internal" href="./integral-constant.html">Integral Constant</a> <tt class="literal"><span class="pre">c</span></tt> such that <tt class="literal"><span class="pre">c::value</span> <span class="pre">==</span> <span class="pre">true</span></tt> if and only if the sequence is empty; see <a class="reference internal" href="./bidirectional-sequence.html">Bidirectional Sequence</a>.</td> </tr> <tr><td><tt class="literal"><span class="pre"><a href="./front.html" class="identifier">front</a><s>::type</span></tt></td> <td>The first element in <tt class="literal"><span class="pre">s</span></tt>; see <a class="reference internal" href="./bidirectional-sequence.html">Bidirectional Sequence</a>.</td> </tr> <tr><td><tt class="literal"><span class="pre"><a href="./back.html" class="identifier">back</a><s>::type</span></tt></td> <td>The last element in <tt class="literal"><span class="pre">s</span></tt>; see <a class="reference internal" href="./bidirectional-sequence.html">Bidirectional Sequence</a>.</td> </tr> <tr><td><tt class="literal"><span class="pre"><a href="./insert.html" class="identifier">insert</a><s,pos,x>::type</span></tt></td> <td>A new <tt class="literal"><span class="pre"><a href="./string.html" class="identifier">string</a></span></tt> of following elements: [<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a><s>::type</span></tt>, <tt class="literal"><span class="pre">pos</span></tt>), <tt class="literal"><span class="pre">x</span></tt>, [<tt class="literal"><span class="pre">pos</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><s>::type</span></tt>); see <a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>.</td> </tr> <tr><td><tt class="literal"><span class="pre"><a href="./insert-range.html" class="identifier">insert_range</a><s,pos,r>::type</span></tt></td> <td>A new <tt class="literal"><span class="pre"><a href="./string.html" class="identifier">string</a></span></tt> of following elements: [<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a><s>::type</span></tt>, <tt class="literal"><span class="pre">pos</span></tt>), [<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a><r>::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><r>::type</span></tt>) [<tt class="literal"><span class="pre">pos</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><s>::type</span></tt>); see <a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>.</td> </tr> <tr><td><tt class="literal"><span class="pre"><a href="./erase.html" class="identifier">erase</a><s,pos>::type</span></tt></td> <td>A new <tt class="literal"><span class="pre"><a href="./string.html" class="identifier">string</a></span></tt> of following elements: [<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a><s>::type</span></tt>, <tt class="literal"><span class="pre">pos</span></tt>), [<tt class="literal"><span class="pre"><a href="./next.html" class="identifier">next</a><pos>::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><s>::type</span></tt>); see <a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>.</td> </tr> <tr><td><tt class="literal"><span class="pre"><a href="./erase.html" class="identifier">erase</a><s,pos,last>::type</span></tt></td> <td>A new <tt class="literal"><span class="pre"><a href="./string.html" class="identifier">string</a></span></tt> of following elements: [<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a><s>::type</span></tt>, <tt class="literal"><span class="pre">pos</span></tt>), [<tt class="literal"><span class="pre">last</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><s>::type</span></tt>); see <a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>.</td> </tr> <tr><td><tt class="literal"><span class="pre"><a href="./clear.html" class="identifier">clear</a><s>::type</span></tt></td> <td>An empty <tt class="literal"><span class="pre"><a href="./string.html" class="identifier">string</a></span></tt>; see <a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>.</td> </tr> <tr><td><tt class="literal"><span class="pre"><a href="./push-back.html" class="identifier">push_back</a><s,x>::type</span></tt></td> <td>A new <tt class="literal"><span class="pre"><a href="./string.html" class="identifier">string</a></span></tt> of following elements: [<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a><s>::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><s>::type</span></tt>), <tt class="literal"><span class="pre">x</span></tt>; see <a class="reference internal" href="./back-extensible-sequence.html">Back Extensible Sequence</a>.</td> </tr> <tr><td><tt class="literal"><span class="pre"><a href="./pop-back.html" class="identifier">pop_back</a><s>::type</span></tt></td> <td>A new <tt class="literal"><span class="pre"><a href="./string.html" class="identifier">string</a></span></tt> of following elements: [<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a><s>::type</span></tt>, <tt class="literal"><span class="pre"><a href="./prior.html" class="identifier">prior</a><</span> <span class="pre"><a href="./end.html" class="identifier">end</a><s>::type</span> <span class="pre">>::type</span></tt>); see <a class="reference internal" href="./back-extensible-sequence.html">Back Extensible Sequence</a>.</td> </tr> <tr><td><tt class="literal"><span class="pre"><a href="./push-front.html" class="identifier">push_front</a><s,x>::type</span></tt></td> <td>A new <tt class="literal"><span class="pre"><a href="./string.html" class="identifier">string</a></span></tt> of following elements: [<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a><s>::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><s>::type</span></tt>), <tt class="literal"><span class="pre">x</span></tt>; see <a class="reference internal" href="./front-extensible-sequence.html">Front Extensible Sequence</a>.</td> </tr> <tr><td><tt class="literal"><span class="pre"><a href="./pop-front.html" class="identifier">pop_front</a><s>::type</span></tt></td> <td>A new <tt class="literal"><span class="pre"><a href="./string.html" class="identifier">string</a></span></tt> of following elements: [<tt class="literal"><span class="pre"><a href="./next.html" class="identifier">next</a><</span> <span class="pre"><a href="./begin.html" class="identifier">begin</a><s>::type</span> <span class="pre">>::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><s>::type</span></tt>); see <a class="reference internal" href="./front-extensible-sequence.html">Front Extensible Sequence</a>.</td> </tr> <tr><td><tt class="literal"><span class="pre"><a href="./c-str.html" class="identifier">c_str</a><s>::value</span></tt></td> <td>A null-terminated byte string such that <tt class="literal"><span class="pre"><a href="./c-str.html" class="identifier">c_str</a><s>::value[</span></tt><em>n</em><tt class="literal"><span class="pre">]</span></tt> is equal to the <em>n</em>-th character in <tt class="literal"><span class="pre">s</span></tt>, and <tt class="literal"><span class="pre"><a href="./c-str.html" class="identifier">c_str</a><s>::value[<a href="./size.html" class="identifier">size</a><s>::type::value]</span></tt> is <tt class="literal"><span class="pre">'\0'</span></tt>.</td> </tr> </tbody> </table> </div> <div class="section" id="id118"> <h3><a class="subsection-title" href="#example" name="example">Example</a></h3> <pre class="literal-block"> typedef mpl::<a href="./string.html" class="identifier">string</a><'hell','o wo','rld'> hello; typedef mpl::<a href="./push-back.html" class="identifier">push_back</a><hello, mpl::<a href="./char.html" class="identifier">char_</a><'!'> >::type hello2; BOOST_ASSERT(0 == std::strcmp(mpl::<a href="./c-str.html" class="identifier">c_str</a><hello2>::value, "hello world!")); </pre> </div> <div class="section" id="id119"> <h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3> <p><a class="reference internal" href="./sequences.html">Sequences</a>, <a class="reference internal" href="./variadic-sequence.html">Variadic Sequence</a>, <a class="reference internal" href="./bidirectional-sequence.html">Bidirectional Sequence</a>, <a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>, <a class="reference internal" href="./integral-sequence-wrapper.html">Integral Sequence Wrapper</a>, <a class="reference internal" href="./char.html">char_</a>, <a class="reference internal" href="./c-str.html">c_str</a></p> </div> </div> <div class="footer-separator"></div> <table class="footer"><tr class="footer"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./set-c.html" class="navigation-link">Prev</a> <a href="./views.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./set-c.html" class="navigation-link">Back</a> Along</span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./classes.html" class="navigation-link">Up</a> <a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td> <td><div class="copyright-footer"><div class="copyright">Copyright © 2009 Eric Niebler</div> Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at <a class="reference external" href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)</div></td></tr></table></body> </html>