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<div class="navpath"><a class="el" href="namespaceParma__Polyhedra__Library.html">Parma_Polyhedra_Library</a>::<a class="el" href="namespaceParma__Polyhedra__Library_1_1IO__Operators.html">IO_Operators</a>
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<h1>Parma_Polyhedra_Library::IO_Operators Namespace Reference<br/>
<small>
[<a class="el" href="group__PPL__CXX__interface.html">C++ Language Interface</a>]</small>
</h1>
<p>All input/output operators are confined to this namespace.
<a href="#_details">More...</a></p>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td colspan="2"><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceParma__Polyhedra__Library_1_1IO__Operators.html#a9ccf426c9d89537e0351aac50a333e95">wrap_string</a> (const std::string &src_string, unsigned indent_depth, unsigned preferred_first_line_length, unsigned preferred_line_length)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Utility function for the wrapping of lines of text. <a href="#a9ccf426c9d89537e0351aac50a333e95"></a><br/></td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>All input/output operators are confined to this namespace. </p>
<p>This is done so that the library's input/output operators do not interfere with those the user might want to define. In fact, it is highly unlikely that any predefined I/O operator will suit the needs of a client application. On the other hand, those applications for which the PPL I/O operator are enough can easily obtain access to them. For example, a directive like </p>
<div class="fragment"><pre class="fragment"> <span class="keyword">using namespace </span>Parma_Polyhedra_Library::IO_Operators;
</pre></div><p> would suffice for most uses. In more complex situations, such as </p>
<div class="fragment"><pre class="fragment"> <span class="keyword">const</span> Constraint_System& cs = ...;
copy(cs.begin(), cs.end(),
ostream_iterator<Constraint>(cout, <span class="stringliteral">"\n"</span>));
</pre></div><p> the <a class="el" href="namespaceParma__Polyhedra__Library.html" title="The entire library is confined to this namespace.">Parma_Polyhedra_Library</a> namespace must be suitably extended. This can be done as follows: </p>
<div class="fragment"><pre class="fragment"> <span class="keyword">namespace </span>Parma_Polyhedra_Library {
<span class="comment">// Import all the output operators into the main PPL namespace.</span>
<span class="keyword">using</span> IO_Operators::operator<<;
}
</pre></div> <hr/><h2>Function Documentation</h2>
<a class="anchor" id="a9ccf426c9d89537e0351aac50a333e95"></a><!-- doxytag: member="Parma_Polyhedra_Library::IO_Operators::wrap_string" ref="a9ccf426c9d89537e0351aac50a333e95" args="(const std::string &src_string, unsigned indent_depth, unsigned preferred_first_line_length, unsigned preferred_line_length)" -->
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<td class="memname">std::string Parma_Polyhedra_Library::IO_Operators::wrap_string </td>
<td>(</td>
<td class="paramtype">const std::string & </td>
<td class="paramname"> <em>src_string</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned </td>
<td class="paramname"> <em>indent_depth</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned </td>
<td class="paramname"> <em>preferred_first_line_length</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned </td>
<td class="paramname"> <em>preferred_line_length</em></td><td> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<div class="memdoc">
<p>Utility function for the wrapping of lines of text. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>src_string</em> </td><td>The source string holding the lines to wrap.</td></tr>
<tr><td valign="top"></td><td valign="top"><em>indent_depth</em> </td><td>The indentation depth.</td></tr>
<tr><td valign="top"></td><td valign="top"><em>preferred_first_line_length</em> </td><td>The preferred length for the first line of text.</td></tr>
<tr><td valign="top"></td><td valign="top"><em>preferred_line_length</em> </td><td>The preferred length for all the lines but the first one.</td></tr>
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</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>The wrapped string. </dd></dl>
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