122 lines
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122 lines
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<title>execution::submit</title>
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<div class="section">
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<div class="titlepage"><div><div><h3 class="title">
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<a name="boost_asio.reference.execution__submit"></a><a class="link" href="execution__submit.html" title="execution::submit">execution::submit</a>
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</h3></div></div></div>
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<p>
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<a class="indexterm" name="boost_asio.indexterm.execution__submit"></a>
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A customisation point
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that submits a sender to a receiver.
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</p>
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<pre class="programlisting">constexpr unspecified submit = unspecified;
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</pre>
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<p>
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The name <code class="computeroutput">execution::submit</code> denotes a customisation point object.
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For some subexpressions <code class="computeroutput">s</code> and <code class="computeroutput">r</code>, let <code class="computeroutput">S</code>
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be a type such that <code class="computeroutput">decltype((s))</code> is <code class="computeroutput">S</code> and let
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<code class="computeroutput">R</code> be a type such that <code class="computeroutput">decltype((r))</code> is <code class="computeroutput">R</code>.
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The expression <code class="computeroutput">execution::submit(s, r)</code> is ill-formed if <code class="computeroutput">sender_to<S,
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R></code> is not <code class="computeroutput">true</code>. Otherwise, it is expression-equivalent
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to:
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</p>
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<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
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<li class="listitem">
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<code class="computeroutput">s.submit(r)</code>, if that expression is valid and <code class="computeroutput">S</code>
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models <code class="computeroutput">sender</code>. If the function selected does not submit
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the receiver object <code class="computeroutput">r</code> via the sender <code class="computeroutput">s</code>, the
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program is ill-formed with no diagnostic required.
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</li>
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<li class="listitem">
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Otherwise, <code class="computeroutput">submit(s, r)</code>, if that expression is valid and
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<code class="computeroutput">S</code> models <code class="computeroutput">sender</code>, with overload resolution performed
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in a context that includes the declaration <code class="computeroutput">void submit();</code>
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and that does not include a declaration of <code class="computeroutput">execution::submit</code>.
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If the function selected by overload resolution does not submit the receiver
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object <code class="computeroutput">r</code> via the sender <code class="computeroutput">s</code>, the program is ill-formed
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with no diagnostic required.
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</li>
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<li class="listitem">
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Otherwise, <code class="computeroutput">execution::start((new submit_receiver<S, R>{s,r})->state_)</code>,
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where <code class="computeroutput">submit_receiver</code> is an implementation-defined class
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template equivalent to:
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</li>
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</ul></div>
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<pre class="programlisting">template<class S, class R>
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struct submit_receiver {
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struct wrap {
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submit_receiver * p_;
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template<class...As>
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requires receiver_of<R, As...>
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void set_value(As&&... as) &&
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noexcept(is_nothrow_receiver_of_v<R, As...>) {
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execution::set_value(std::move(p_->r_), (As&&) as...);
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delete p_;
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}
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template<class E>
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requires receiver<R, E>
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void set_error(E&& e) && noexcept {
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execution::set_error(std::move(p_->r_), (E&&) e);
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delete p_;
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}
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void set_done() && noexcept {
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execution::set_done(std::move(p_->r_));
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delete p_;
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}
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};
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remove_cvref_t<R> r_;
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connect_result_t<S, wrap> state_;
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submit_receiver(S&& s, R&& r)
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: r_((R&&) r)
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, state_(execution::connect((S&&) s, wrap{this})) {}
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};
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</pre>
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<h5>
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<a name="boost_asio.reference.execution__submit.h0"></a>
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<span class="phrase"><a name="boost_asio.reference.execution__submit.requirements"></a></span><a class="link" href="execution__submit.html#boost_asio.reference.execution__submit.requirements">Requirements</a>
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</h5>
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<p>
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<span class="emphasis"><em>Header: </em></span><code class="literal">boost/asio/execution/submit.hpp</code>
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</p>
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<p>
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<span class="emphasis"><em>Convenience header: </em></span><code class="literal">boost/asio/execution.hpp</code>
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</p>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="left"></td>
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<td align="right"><div class="copyright-footer">Copyright © 2003-2021 Christopher
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M. Kohlhoff<p>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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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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