execution__submit.html
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<div class="titlepage"><div><div><h3 class="title">
<a name="asio.reference.execution__submit"></a><a class="link" href="execution__submit.html" title="execution::submit">execution::submit</a>
</h3></div></div></div>
<p>
<a class="indexterm" name="asio.indexterm.execution__submit"></a>
A customisation point that
submits a sender to a receiver.
</p>
<pre class="programlisting">constexpr unspecified submit = unspecified;
</pre>
<p>
The name <code class="computeroutput">execution::submit</code> denotes a customisation point object.
For some subexpressions <code class="computeroutput">s</code> and <code class="computeroutput">r</code>, let <code class="computeroutput">S</code>
be a type such that <code class="computeroutput">decltype((s))</code> is <code class="computeroutput">S</code> and let
<code class="computeroutput">R</code> be a type such that <code class="computeroutput">decltype((r))</code> is <code class="computeroutput">R</code>.
The expression <code class="computeroutput">execution::submit(s, r)</code> is ill-formed if <code class="computeroutput">sender_to<S,
R></code> is not <code class="computeroutput">true</code>. Otherwise, it is expression-equivalent
to:
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
<code class="computeroutput">s.submit(r)</code>, if that expression is valid and <code class="computeroutput">S</code>
models <code class="computeroutput">sender</code>. If the function selected does not submit
the receiver object <code class="computeroutput">r</code> via the sender <code class="computeroutput">s</code>, the
program is ill-formed with no diagnostic required.
</li>
<li class="listitem">
Otherwise, <code class="computeroutput">submit(s, r)</code>, if that expression is valid and
<code class="computeroutput">S</code> models <code class="computeroutput">sender</code>, with overload resolution performed
in a context that includes the declaration <code class="computeroutput">void submit();</code>
and that does not include a declaration of <code class="computeroutput">execution::submit</code>.
If the function selected by overload resolution does not submit the receiver
object <code class="computeroutput">r</code> via the sender <code class="computeroutput">s</code>, the program is ill-formed
with no diagnostic required.
</li>
<li class="listitem">
Otherwise, <code class="computeroutput">execution::start((new submit_receiver<S, R>{s,r})->state_)</code>,
where <code class="computeroutput">submit_receiver</code> is an implementation-defined class
template equivalent to:
</li>
</ul></div>
<pre class="programlisting">template<class S, class R>
struct submit_receiver {
struct wrap {
submit_receiver * p_;
template<class...As>
requires receiver_of<R, As...>
void set_value(As&&... as) &&
noexcept(is_nothrow_receiver_of_v<R, As...>) {
execution::set_value(std::move(p_->r_), (As&&) as...);
delete p_;
}
template<class E>
requires receiver<R, E>
void set_error(E&& e) && noexcept {
execution::set_error(std::move(p_->r_), (E&&) e);
delete p_;
}
void set_done() && noexcept {
execution::set_done(std::move(p_->r_));
delete p_;
}
};
remove_cvref_t<R> r_;
connect_result_t<S, wrap> state_;
submit_receiver(S&& s, R&& r)
: r_((R&&) r)
, state_(execution::connect((S&&) s, wrap{this})) {}
};
</pre>
<h5>
<a name="asio.reference.execution__submit.h0"></a>
<span><a name="asio.reference.execution__submit.requirements"></a></span><a class="link" href="execution__submit.html#asio.reference.execution__submit.requirements">Requirements</a>
</h5>
<p>
<span class="emphasis"><em>Header: </em></span><code class="literal">asio/execution/submit.hpp</code>
</p>
<p>
<span class="emphasis"><em>Convenience header: </em></span><code class="literal">asio/execution.hpp</code>
</p>
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<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
Kohlhoff<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
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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