1 <!DOCTYPE html PUBLIC '-//W3C//DTD XHTML
1.0 Strict//EN'
2 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd'
>
3 <html xmlns='http://www.w3.org/
1999/xhtml' xml:lang='en' lang='en'
>
5 <meta http-equiv='Content-Type' content='text/html; charset=utf-
8'
/>
6 <title>exception_ptr
</title>
7 <link href='reno.css' type='text/css' rel='stylesheet'
/>
15 <a href=
"http://www.boost.org"><img style=
"border:0" src=
"../../../boost.png" alt=
"Boost" width=
"277" height=
"86"/></a>
17 <h1>Boost Exception
</h1>
19 <!-- Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc. -->
20 <!-- Distributed under the Boost Software License, Version 1.0. (See accompanying -->
21 <!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
22 <div class=
"RenoIncludeDIV"><div class=
"RenoAutoDIV"><h3>exception_ptr
</h3>
24 <div class=
"RenoIncludeDIV"><p><span class=
"RenoEscape">#<!--<wiki>`#</wiki>--></span>include
<<span class=
"RenoLink"><a href=
"boost_exception_ptr_hpp.html">boost/exception_ptr.hpp
</a></span>></p>
28 <span class=
"RenoIncludeSPAN"> typedef ---unspecified---
<span class=
"RenoLink">exception_ptr
</span>;
</span>
30 </div><p>The
<span class=
"RenoLink">exception_ptr
</span> type can be used to refer to a copy of an exception object. It is Default Constructible, Copy Constructible, Assignable and Equality Comparable;
<span class=
"RenoLink">exception_ptr
</span>'s operations do not throw.
</p>
31 <p>The referenced object remains valid at least as long as there is an
<span class=
"RenoLink">exception_ptr
</span> object that refers to it.
</p>
32 <p>Two instances of
<span class=
"RenoLink">exception_ptr
</span> are equivalent and compare equal if and only if they refer to the same exception.
</p>
33 <p>The default constructor of
<span class=
"RenoLink">exception_ptr
</span> produces the null value of the type. The null value is equivalent only to itself.
</p>
34 <h4>Thread safety:
</h4>
35 <p>The
<span class=
"RenoLink">exception_ptr
</span> type is
"as thread-safe as built-in types":
</p>
36 <div><ul><li> An
<span class=
"RenoLink">exception_ptr
</span> instance can be
"read" simultaneously by multiple threads
</li>
37 <li> Different
<span class=
"RenoLink">exception_ptr
</span> instances can be
"written to" simultaneously by multiple threads, even when these instances refer to the same exception object
</li>
39 <p>All other simultaneous accesses result in undefined behavior.
</p>
40 <h4>Nesting of exceptions:
</h4>
41 <p>An
<span class=
"RenoLink">exception_ptr
</span> can be added as
<span class=
"RenoLink"><a href=
"error_info.html">error_info
</a></span> to any boost::
<span class=
"RenoLink"><a href=
"exception.html">exception
</a></span>. This is a convenient way to nest exceptions. There is no limit on the depth of the nesting, however cyclic references result in undefined behavior.
</p>
42 </div><div class=
"RenoAutoDIV"><div class=
"RenoHR"><hr/></div>
43 See also:
<span class=
"RenoPageList"><a href=
"boost-exception.html">Boost Exception
</a> |
<a href=
"boost_exception_errinfo_nested_exception_hpp.html">boost/exception/errinfo_nested_exception.hpp
</a> |
<a href=
"boost_exception_ptr_hpp.html">boost/exception_ptr.hpp
</a> |
<a href=
"copy_exception.html">copy_exception
</a> |
<a href=
"current_exception.html">current_exception
</a> |
<a href=
"diagnostic_information.html">diagnostic_information
</a> |
<a href=
"enable_current_exception.html">enable_current_exception
</a> |
<a href=
"original_exception_type.html">original_exception_type
</a> |
<a href=
"rethrow_exception.html">rethrow_exception
</a> |
<a href=
"throw_exception.html">throw_exception
</a> |
<a href=
"unknown_exception.html">unknown_exception
</a></span>
45 <!-- Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc. -->
46 <!-- Distributed under the Boost Software License, Version 1.0. (See accompanying -->
47 <!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
50 <a class=
"logo" href=
"http://jigsaw.w3.org/css-validator/check/referer"><img class=
"logo_pic" src=
"valid-css.png" alt=
"Valid CSS" height=
"31" width=
"88"/></a>
51 <a class=
"logo" href=
"http://validator.w3.org/check?uri=referer"><img class=
"logo_pic" src=
"valid-xhtml.png" alt=
"Valid XHTML 1.0" height=
"31" width=
"88"/></a>
52 <small>Copyright (c)
2006-
2009 by Emil Dotchevski and Reverge Studios, Inc.
<br/>
53 Distributed under the
<a href=
"http://www.boost.org/LICENSE_1_0.txt">Boost Software License, Version
1.0</a>.
</small>