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24 | </div> | |
25 | <div class="section"> | |
26 | <div class="titlepage"><div><div><h4 class="title"> | |
27 | <a name="phoenix.modules.object.construction"></a><a class="link" href="construction.html" title="Construction">Construction</a> | |
28 | </h4></div></div></div> | |
29 | <p> | |
30 | <span class="bold"><strong><span class="emphasis"><em>Lazy constructors...</em></span></strong></span> | |
31 | </p> | |
32 | <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">phoenix</span><span class="special">/</span><span class="identifier">object</span><span class="special">/</span><span class="identifier">construct</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> | |
33 | </pre> | |
34 | <p> | |
35 | Lazily construct an object from an arbitrary set of arguments: | |
36 | </p> | |
37 | <pre class="programlisting"><span class="identifier">construct</span><span class="special"><</span><span class="identifier">T</span><span class="special">>(</span><span class="identifier">ctor_arg1</span><span class="special">,</span> <span class="identifier">ctor_arg2</span><span class="special">,</span> <span class="special">...,</span> <span class="identifier">ctor_argN</span><span class="special">);</span> | |
38 | </pre> | |
39 | <p> | |
40 | where the given parameters are the parameters to the constructor of the | |
41 | object of type T (This implies, that type T is expected to have a constructor | |
42 | with a corresponding set of parameter types.). | |
43 | </p> | |
44 | <p> | |
45 | Example: | |
46 | </p> | |
47 | <pre class="programlisting"><span class="identifier">construct</span><span class="special"><</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">>(</span><span class="identifier">arg1</span><span class="special">,</span> <span class="identifier">arg2</span><span class="special">)</span> | |
48 | </pre> | |
49 | <p> | |
50 | Constructs a <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span></code> from <code class="computeroutput"><span class="identifier">arg1</span></code> | |
51 | and <code class="computeroutput"><span class="identifier">arg2</span></code>. | |
52 | </p> | |
53 | <div class="note"><table border="0" summary="Note"> | |
54 | <tr> | |
55 | <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../doc/src/images/note.png"></td> | |
56 | <th align="left">Note</th> | |
57 | </tr> | |
58 | <tr><td align="left" valign="top"><p> | |
59 | The maximum number of actual parameters is limited by the preprocessor | |
60 | constant BOOST_PHOENIX_COMPOSITE_LIMIT. Note though, that this limit | |
61 | should not be greater than BOOST_PHOENIX_LIMIT. By default, <code class="computeroutput"><span class="identifier">BOOST_PHOENIX_COMPOSITE_LIMIT</span></code> is set | |
62 | to <code class="computeroutput"><span class="identifier">BOOST_PHOENIX_LIMIT</span></code> | |
63 | (See <a class="link" href="../../actor.html" title="Actor">Actor</a>). | |
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69 | <td align="right"><div class="copyright-footer">Copyright © 2002-2005, 2010, 2014, 2015 Joel de Guzman, Dan Marsden, Thomas | |
70 | Heller, John Fletcher<p> | |
71 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
72 | file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) | |
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