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- <div class="titlepage"><div><div><h1 style="clear: both">Experimental</h1></div></div></div>
- <p>In <code><boost/outcome/experimental></code>, there ships an Outcome-based simulation of
- the proposed <a href="https://wg21.link/P1095">P1095 <em>Zero overhead deterministic failure</em></a>
- specific implementation of <a href="http://wg21.link/P0709">P0709 <em>Zero overhead exceptions: Throwing values</em></a>, aka “Herbceptions”. This library-only implementation lets you use a close simulacrum
- of potential future C++ lightweight exceptions today in <a href="./requirements.html">any C++ 14 compiler
- which Outcome supports</a>.</p>
- <div class="notices warning" style="background: url('images/warning.png') top left no-repeat padding-box padding-box;">
- <div class="notices heading">warning</div>
- <div class="notices message"><p><b>It is stressed, in the strongest possible terms, that any item inside
- <code><boost/outcome/experimental></code> is subject to unannounced breaking change based
- on WG21 standards committee feedback</b>. That said, the chances are high
- that most of those breaking changes will be to naming rather than to
- fundamental semantics, so you can upgrade with a bit of find and replace.
- There are quite a few large code bases out there
- already using this experimental support in anger, we know it works well
- at scale and it’s a good bit superior to <code>std::error_code</code> et al on every
- measure.</p>
- </div>
- </div>
- <p>P1095’s support library has a reference implementation at <a href="https://ned14.github.io/status-code/">https://ned14.github.io/status-code/</a>.
- You will find terse documentation there, and an API reference.
- This library is wholly incorporated into Outcome in the <code><boost/outcome/experimental/status-code></code>
- directory, with bindings into Outcome provided in the following headers:</p>
- <ul>
- <li><code><boost/outcome/experimental/status_result.hpp></code></li>
- <li><code><boost/outcome/experimental/status_outcome.hpp></code></li>
- </ul>
- <p>These headers import the entire contents of the <code>BOOST_OUTCOME_SYSTEM_ERROR2_NAMESPACE</code>
- namespace into the <code>BOOST_OUTCOME_V2_NAMESPACE::experimental</code> namespace. You
- can thus address everything in <code>BOOST_OUTCOME_SYSTEM_ERROR2_NAMESPACE</code> via
- <code>BOOST_OUTCOME_V2_NAMESPACE::experimental</code>.</p>
- <p>As P1095 also proposes C language support for lightweight C++ exceptions,
- experimental Outcome also has a macro-based C interface that enables C
- code to work with the C-compatible subset of <code>status_result<T, E></code>:</p>
- <ul>
- <li><code><boost/outcome/experimental/result.h></code></li>
- </ul>
- </div><p><small>Last revised: January 26, 2019 at 21:01:46 UTC</small></p>
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