source: downloads/boost_1_33_1/libs/concept_check/doc/reference/CopyConstructible.xml @ 12

<?xml version="1.0"?>
<concept name="CopyConstructible" category="Utility"><!--
Based on concepts from the SGI Standard Template Library documentation:
Copyright (c) 1996-1999
Silicon Graphics Computer Systems, Inc.

Copyright (c) 1994
Hewlett-Packard Company
--><!--
Copyright 2000-2001 University of Notre Dame du Lac.
Copyright 2001-2002 Indiana University.
Some concepts based on versions from the MTL draft manual and Boost Graph
and Property Map documentation:
Copyright (c) Jeremy Siek, Lie-Quan Lee, and Andrew Lumsdaine 2000
-->
  <param name="X" role="copy-constructible-type"/>

  <models-sentence>The type <arg num="1"/> must be a model of <self/>.</models-sentence>

  <description>
  <para>Copy constructible types must be able to be constructed from another
  member of the type.</para>
  </description>

  <notation variables="x y">
    <sample-value>
      <type name="X"/>
    </sample-value>
  </notation>

  <valid-expression name="Copy construction">
    <construct template-parameters="">
      <type name="X"/>
      <sample-value><const><reference-to><type name="X"/></reference-to></const></sample-value>
    </construct>
    <return-type>
      <require-same-type testable="yes">
        <type name="X"/>
      </require-same-type>
    </return-type>
    <semantics>Require copy constructor.</semantics>
  </valid-expression>

  <example-model>
    <type name="int"/>
  </example-model>
</concept>