| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Accepts inbound HTTP/2 streams on a connection."><meta name="keywords" content="rust, rustlang, rust-lang, Connection"><title>Connection in h2::server - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" 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href="../../h2/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../../h2/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2 class="location"><a href="#">Connection</a></h2><div class="sidebar-elems"><section><h3><a href="#implementations">Methods</a></h3><ul class="block"><li><a href="#method.abrupt_shutdown">abrupt_shutdown</a></li><li><a href="#method.accept">accept</a></li><li><a href="#method.enable_connect_protocol">enable_connect_protocol</a></li><li><a href="#method.graceful_shutdown">graceful_shutdown</a></li><li><a href="#method.max_concurrent_recv_streams">max_concurrent_recv_streams</a></li><li><a href="#method.max_concurrent_send_streams">max_concurrent_send_streams</a></li><li><a href="#method.ping_pong">ping_pong</a></li><li><a href="#method.poll_closed">poll_closed</a></li><li><a href="#method.set_initial_window_size">set_initial_window_size</a></li><li><a href="#method.set_target_window_size">set_target_window_size</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block"><li><a href="#impl-Debug-for-Connection%3CT%2C%20B%3E">Debug</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block"><li><a href="#impl-RefUnwindSafe-for-Connection%3CT%2C%20B%3E">!RefUnwindSafe</a></li><li><a href="#impl-Send-for-Connection%3CT%2C%20B%3E">Send</a></li><li><a href="#impl-Sync-for-Connection%3CT%2C%20B%3E">Sync</a></li><li><a href="#impl-Unpin-for-Connection%3CT%2C%20B%3E">Unpin</a></li><li><a href="#impl-UnwindSafe-for-Connection%3CT%2C%20B%3E">!UnwindSafe</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block"><li><a href="#impl-Any-for-Connection%3CT%2C%20B%3E">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-Connection%3CT%2C%20B%3E">Borrow<T></a></li><li><a href="#impl-BorrowMut%3CT%3E-for-Connection%3CT%2C%20B%3E">BorrowMut<T></a></li><li><a href="#impl-From%3CT%3E-for-Connection%3CT%2C%20B%3E">From<T></a></li><li><a href="#impl-Instrument-for-Connection%3CT%2C%20B%3E">Instrument</a></li><li><a href="#impl-Into%3CU%3E-for-Connection%3CT%2C%20B%3E">Into<U></a></li><li><a href="#impl-TryFrom%3CU%3E-for-Connection%3CT%2C%20B%3E">TryFrom<U></a></li><li><a href="#impl-TryInto%3CU%3E-for-Connection%3CT%2C%20B%3E">TryInto<U></a></li><li><a href="#impl-WithSubscriber-for-Connection%3CT%2C%20B%3E">WithSubscriber</a></li></ul></section><h2><a href="index.html">In h2::server</a></h2></div></nav><main><div class="width-limiter"><nav class="sub"><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn">Struct <a href="../index.html">h2</a>::<wbr><a href="index.html">server</a>::<wbr><a class="struct" href="#">Connection</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="srclink" href="../../src/h2/server.rs.html#196-198">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="item-decl"><pre class="rust struct"><code>pub struct Connection<T, B: <a class="trait" href="../../bytes/buf/buf_impl/trait.Buf.html" title="trait bytes::buf::buf_impl::Buf">Buf</a>> { /* private fields */ }</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Accepts inbound HTTP/2 streams on a connection.</p> |
| <p>A <code>Connection</code> is backed by an I/O resource (usually a TCP socket) and |
| implements the HTTP/2 server logic for that connection. It is responsible |
| for receiving inbound streams initiated by the client as well as driving the |
| internal state forward.</p> |
| <p><code>Connection</code> values are created by calling <a href="struct.Connection.html#method.handshake"><code>handshake</code></a>. Once a |
| <code>Connection</code> value is obtained, the caller must call <a href="struct.Connection.html#method.poll"><code>poll</code></a> or |
| <a href="struct.Connection.html#method.poll_close"><code>poll_close</code></a> in order to drive the internal connection state forward.</p> |
| <p>See <a href="index.html">module level</a> documentation for more details</p> |
| <h2 id="examples"><a href="#examples">Examples</a></h2> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>server = server::handshake(my_io).<span class="kw">await</span>.unwrap(); |
| <span class="kw">while let </span><span class="prelude-val">Some</span>(request) = server.accept().<span class="kw">await </span>{ |
| tokio::spawn(<span class="kw">async move </span>{ |
| <span class="kw">let </span>(request, respond) = request.unwrap(); |
| <span class="comment">// Process the request and send the response back to the client |
| // using `respond`. |
| </span>}); |
| }</code></pre></div> |
| </div></details><h2 id="implementations" class="small-section-header">Implementations<a href="#implementations" class="anchor"></a></h2><div id="implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Connection%3CT%2C%20B%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/h2/server.rs.html#368-590">source</a><a href="#impl-Connection%3CT%2C%20B%3E" class="anchor"></a><h3 class="code-header">impl<T, B> <a class="struct" href="struct.Connection.html" title="struct h2::server::Connection">Connection</a><T, B><span class="where fmt-newline">where<br> T: <a class="trait" href="../../tokio/io/async_read/trait.AsyncRead.html" title="trait tokio::io::async_read::AsyncRead">AsyncRead</a> + <a class="trait" href="../../tokio/io/async_write/trait.AsyncWrite.html" title="trait tokio::io::async_write::AsyncWrite">AsyncWrite</a> + Unpin,<br> B: <a class="trait" href="../../bytes/buf/buf_impl/trait.Buf.html" title="trait bytes::buf::buf_impl::Buf">Buf</a>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.accept" class="method has-srclink"><a class="srclink rightside" href="../../src/h2/server.rs.html#407-411">source</a><h4 class="code-header">pub async fn <a href="#method.accept" class="fnname">accept</a>(<br> &mut self<br>) -> Option<Result<(<a class="struct" href="../../http/request/struct.Request.html" title="struct http::request::Request">Request</a><<a class="struct" href="../struct.RecvStream.html" title="struct h2::RecvStream">RecvStream</a>>, <a class="struct" href="struct.SendResponse.html" title="struct h2::server::SendResponse">SendResponse</a><B>), <a class="struct" href="../struct.Error.html" title="struct h2::Error">Error</a>>></h4></section></summary><div class="docblock"><p>Accept the next incoming request on this connection.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.set_target_window_size" class="method has-srclink"><a class="srclink rightside" href="../../src/h2/server.rs.html#457-460">source</a><h4 class="code-header">pub fn <a href="#method.set_target_window_size" class="fnname">set_target_window_size</a>(&mut self, size: u32)</h4></section></summary><div class="docblock"><p>Sets the target window size for the whole connection.</p> |
| <p>If <code>size</code> is greater than the current value, then a <code>WINDOW_UPDATE</code> |
| frame will be immediately sent to the remote, increasing the connection |
| level window by <code>size - current_value</code>.</p> |
| <p>If <code>size</code> is less than the current value, nothing will happen |
| immediately. However, as window capacity is released by |
| <a href="../struct.FlowControl.html"><code>FlowControl</code></a> instances, no <code>WINDOW_UPDATE</code> frames will be sent |
| out until the number of “in flight” bytes drops below <code>size</code>.</p> |
| <p>The default value is 65,535.</p> |
| <p>See <a href="../struct.FlowControl.html"><code>FlowControl</code></a> documentation for more details.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.set_initial_window_size" class="method has-srclink"><a class="srclink rightside" href="../../src/h2/server.rs.html#475-479">source</a><h4 class="code-header">pub fn <a href="#method.set_initial_window_size" class="fnname">set_initial_window_size</a>(&mut self, size: u32) -> Result<(), <a class="struct" href="../struct.Error.html" title="struct h2::Error">Error</a>></h4></section></summary><div class="docblock"><p>Set a new <code>INITIAL_WINDOW_SIZE</code> setting (in octets) for stream-level |
| flow control for received data.</p> |
| <p>The <code>SETTINGS</code> will be sent to the remote, and only applied once the |
| remote acknowledges the change.</p> |
| <p>This can be used to increase or decrease the window size for existing |
| streams.</p> |
| <h5 id="errors"><a href="#errors">Errors</a></h5> |
| <p>Returns an error if a previous call is still pending acknowledgement |
| from the remote endpoint.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.enable_connect_protocol" class="method has-srclink"><a class="srclink rightside" href="../../src/h2/server.rs.html#489-492">source</a><h4 class="code-header">pub fn <a href="#method.enable_connect_protocol" class="fnname">enable_connect_protocol</a>(&mut self) -> Result<(), <a class="struct" href="../struct.Error.html" title="struct h2::Error">Error</a>></h4></section></summary><div class="docblock"><p>Enables the <a href="https://datatracker.ietf.org/doc/html/rfc8441#section-4">extended CONNECT protocol</a>.</p> |
| <h5 id="errors-1"><a href="#errors-1">Errors</a></h5> |
| <p>Returns an error if a previous call is still pending acknowledgement |
| from the remote endpoint.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.poll_closed" class="method has-srclink"><a class="srclink rightside" href="../../src/h2/server.rs.html#507-509">source</a><h4 class="code-header">pub fn <a href="#method.poll_closed" class="fnname">poll_closed</a>(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), <a class="struct" href="../struct.Error.html" title="struct h2::Error">Error</a>>></h4></section></summary><div class="docblock"><p>Returns <code>Ready</code> when the underlying connection has closed.</p> |
| <p>If any new inbound streams are received during a call to <code>poll_closed</code>, |
| they will be queued and returned on the next call to <a href="struct.Connection.html#method.poll_accept"><code>poll_accept</code></a>.</p> |
| <p>This function will advance the internal connection state, driving |
| progress on all the other handles (e.g. <a href="../struct.RecvStream.html"><code>RecvStream</code></a> and <a href="../struct.SendStream.html"><code>SendStream</code></a>).</p> |
| <p>See <a href="index.html#managing-the-connection">here</a> for more details.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.abrupt_shutdown" class="method has-srclink"><a class="srclink rightside" href="../../src/h2/server.rs.html#529-531">source</a><h4 class="code-header">pub fn <a href="#method.abrupt_shutdown" class="fnname">abrupt_shutdown</a>(&mut self, reason: <a class="struct" href="../struct.Reason.html" title="struct h2::Reason">Reason</a>)</h4></section></summary><div class="docblock"><p>Sets the connection to a GOAWAY state.</p> |
| <p>Does not terminate the connection. Must continue being polled to close |
| connection.</p> |
| <p>After flushing the GOAWAY frame, the connection is closed. Any |
| outstanding streams do not prevent the connection from closing. This |
| should usually be reserved for shutting down when something bad |
| external to <code>h2</code> has happened, and open streams cannot be properly |
| handled.</p> |
| <p>For graceful shutdowns, see <a href="struct.Connection.html#method.graceful_shutdown"><code>graceful_shutdown</code></a>.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.graceful_shutdown" class="method has-srclink"><a class="srclink rightside" href="../../src/h2/server.rs.html#543-545">source</a><h4 class="code-header">pub fn <a href="#method.graceful_shutdown" class="fnname">graceful_shutdown</a>(&mut self)</h4></section></summary><div class="docblock"><p>Starts a <a href="http://httpwg.org/specs/rfc7540.html#GOAWAY">graceful shutdown</a> process.</p> |
| <p>Must continue being polled to close connection.</p> |
| <p>It’s possible to receive more requests after calling this method, since |
| they might have been in-flight from the client already. After about |
| 1 RTT, no new requests should be accepted. Once all active streams |
| have completed, the connection is closed.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.ping_pong" class="method has-srclink"><a class="srclink rightside" href="../../src/h2/server.rs.html#552-554">source</a><h4 class="code-header">pub fn <a href="#method.ping_pong" class="fnname">ping_pong</a>(&mut self) -> Option<<a class="struct" href="../struct.PingPong.html" title="struct h2::PingPong">PingPong</a>></h4></section></summary><div class="docblock"><p>Takes a <code>PingPong</code> instance from the connection.</p> |
| <h5 id="note"><a href="#note">Note</a></h5> |
| <p>This may only be called once. Calling multiple times will return <code>None</code>.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.max_concurrent_send_streams" class="method has-srclink"><a class="srclink rightside" href="../../src/h2/server.rs.html#565-567">source</a><h4 class="code-header">pub fn <a href="#method.max_concurrent_send_streams" class="fnname">max_concurrent_send_streams</a>(&self) -> usize</h4></section></summary><div class="docblock"><p>Returns the maximum number of concurrent streams that may be initiated |
| by the server on this connection.</p> |
| <p>This limit is configured by the client peer by sending the |
| <a href="https://tools.ietf.org/html/rfc7540#section-5.1.2"><code>SETTINGS_MAX_CONCURRENT_STREAMS</code> parameter</a> in a <code>SETTINGS</code> frame. |
| This method returns the currently acknowledged value received from the |
| remote.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.max_concurrent_recv_streams" class="method has-srclink"><a class="srclink rightside" href="../../src/h2/server.rs.html#580-582">source</a><h4 class="code-header">pub fn <a href="#method.max_concurrent_recv_streams" class="fnname">max_concurrent_recv_streams</a>(&self) -> usize</h4></section></summary><div class="docblock"><p>Returns the maximum number of concurrent streams that may be initiated |
| by the client on this connection.</p> |
| <p>This returns the value of the <a href="https://tools.ietf.org/html/rfc7540#section-5.1.2"><code>SETTINGS_MAX_CONCURRENT_STREAMS</code> |
| parameter</a> sent in a <code>SETTINGS</code> frame that has been |
| acknowledged by the remote peer. The value to be sent is configured by |
| the <a href="../struct.Builder.html#method.max_concurrent_streams"><code>Builder::max_concurrent_streams</code></a> method before handshaking |
| with the remote peer.</p> |
| </div></details></div></details></div><h2 id="trait-implementations" class="small-section-header">Trait Implementations<a href="#trait-implementations" class="anchor"></a></h2><div id="trait-implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Debug-for-Connection%3CT%2C%20B%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/h2/server.rs.html#605-615">source</a><a href="#impl-Debug-for-Connection%3CT%2C%20B%3E" class="anchor"></a><h3 class="code-header">impl<T, B> Debug for <a class="struct" href="struct.Connection.html" title="struct h2::server::Connection">Connection</a><T, B><span class="where fmt-newline">where<br> T: Debug,<br> B: Debug + <a class="trait" href="../../bytes/buf/buf_impl/trait.Buf.html" title="trait bytes::buf::buf_impl::Buf">Buf</a>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.fmt" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/h2/server.rs.html#610-614">source</a><a href="#method.fmt" class="anchor"></a><h4 class="code-header">fn <a class="fnname">fmt</a>(&self, fmt: &mut Formatter<'_>) -> Result</h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a>Read more</a></div></details></div></details></div><h2 id="synthetic-implementations" class="small-section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor"></a></h2><div id="synthetic-implementations-list"><section id="impl-RefUnwindSafe-for-Connection%3CT%2C%20B%3E" class="impl has-srclink"><a href="#impl-RefUnwindSafe-for-Connection%3CT%2C%20B%3E" class="anchor"></a><h3 class="code-header">impl<T, B> !RefUnwindSafe for <a class="struct" href="struct.Connection.html" title="struct h2::server::Connection">Connection</a><T, B></h3></section><section id="impl-Send-for-Connection%3CT%2C%20B%3E" class="impl has-srclink"><a href="#impl-Send-for-Connection%3CT%2C%20B%3E" class="anchor"></a><h3 class="code-header">impl<T, B> Send for <a class="struct" href="struct.Connection.html" title="struct h2::server::Connection">Connection</a><T, B><span class="where fmt-newline">where<br> B: Send,<br> T: Send,</span></h3></section><section id="impl-Sync-for-Connection%3CT%2C%20B%3E" class="impl has-srclink"><a href="#impl-Sync-for-Connection%3CT%2C%20B%3E" class="anchor"></a><h3 class="code-header">impl<T, B> Sync for <a class="struct" href="struct.Connection.html" title="struct h2::server::Connection">Connection</a><T, B><span class="where fmt-newline">where<br> B: Send + Sync,<br> T: Sync,</span></h3></section><section id="impl-Unpin-for-Connection%3CT%2C%20B%3E" class="impl has-srclink"><a href="#impl-Unpin-for-Connection%3CT%2C%20B%3E" class="anchor"></a><h3 class="code-header">impl<T, B> Unpin for <a class="struct" href="struct.Connection.html" title="struct h2::server::Connection">Connection</a><T, B><span class="where fmt-newline">where<br> T: Unpin,</span></h3></section><section id="impl-UnwindSafe-for-Connection%3CT%2C%20B%3E" class="impl has-srclink"><a href="#impl-UnwindSafe-for-Connection%3CT%2C%20B%3E" class="anchor"></a><h3 class="code-header">impl<T, B> !UnwindSafe for <a class="struct" href="struct.Connection.html" title="struct h2::server::Connection">Connection</a><T, B></h3></section></div><h2 id="blanket-implementations" class="small-section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor"></a></h2><div id="blanket-implementations-list"><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Any-for-Connection%3CT%2C%20B%3E" class="impl has-srclink"><a href="#impl-Any-for-Connection%3CT%2C%20B%3E" class="anchor"></a><h3 class="code-header">impl<T> Any for T<span class="where fmt-newline">where<br> T: 'static + ?Sized,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl has-srclink"><a href="#method.type_id" class="anchor"></a><h4 class="code-header">fn <a class="fnname">type_id</a>(&self) -> TypeId</h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-Connection%3CT%2C%20B%3E" class="impl has-srclink"><a href="#impl-Borrow%3CT%3E-for-Connection%3CT%2C%20B%3E" class="anchor"></a><h3 class="code-header">impl<T> Borrow<T> for T<span class="where fmt-newline">where<br> T: ?Sized,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span><a href="#method.borrow" class="anchor"></a><h4 class="code-header">fn <a class="fnname">borrow</a>(&self) -> &T</h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-Connection%3CT%2C%20B%3E" class="impl has-srclink"><a href="#impl-BorrowMut%3CT%3E-for-Connection%3CT%2C%20B%3E" class="anchor"></a><h3 class="code-header">impl<T> BorrowMut<T> for T<span class="where fmt-newline">where<br> T: ?Sized,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span><a href="#method.borrow_mut" class="anchor"></a><h4 class="code-header">fn <a class="fnname">borrow_mut</a>(&mut self) -> &mut T</h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-Connection%3CT%2C%20B%3E" class="impl has-srclink"><a href="#impl-From%3CT%3E-for-Connection%3CT%2C%20B%3E" class="anchor"></a><h3 class="code-header">impl<T> From<T> for T</h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.from" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.from" class="anchor"></a><h4 class="code-header">fn <a class="fnname">from</a>(t: T) -> T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Instrument-for-Connection%3CT%2C%20B%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/tracing/instrument.rs.html#276">source</a><a href="#impl-Instrument-for-Connection%3CT%2C%20B%3E" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="../../tracing/instrument/trait.Instrument.html" title="trait tracing::instrument::Instrument">Instrument</a> for T</h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.instrument" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/tracing/instrument.rs.html#82">source</a><a href="#method.instrument" class="anchor"></a><h4 class="code-header">fn <a href="../../tracing/instrument/trait.Instrument.html#method.instrument" class="fnname">instrument</a>(self, span: <a class="struct" href="../../tracing/span/struct.Span.html" title="struct tracing::span::Span">Span</a>) -> <a class="struct" href="../../tracing/instrument/struct.Instrumented.html" title="struct tracing::instrument::Instrumented">Instrumented</a><Self></h4></section></summary><div class='docblock'>Instruments this type with the provided <a href="../../tracing/span/struct.Span.html" title="Span"><code>Span</code></a>, returning an |
| <code>Instrumented</code> wrapper. <a href="../../tracing/instrument/trait.Instrument.html#method.instrument">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.in_current_span" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/tracing/instrument.rs.html#121">source</a><a href="#method.in_current_span" class="anchor"></a><h4 class="code-header">fn <a href="../../tracing/instrument/trait.Instrument.html#method.in_current_span" class="fnname">in_current_span</a>(self) -> <a class="struct" href="../../tracing/instrument/struct.Instrumented.html" title="struct tracing::instrument::Instrumented">Instrumented</a><Self></h4></section></summary><div class='docblock'>Instruments this type with the <a href="../../tracing/span/struct.Span.html#method.current">current</a> <a href="../../tracing/span/struct.Span.html"><code>Span</code></a>, returning an |
| <code>Instrumented</code> wrapper. <a href="../../tracing/instrument/trait.Instrument.html#method.in_current_span">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-Connection%3CT%2C%20B%3E" class="impl has-srclink"><a href="#impl-Into%3CU%3E-for-Connection%3CT%2C%20B%3E" class="anchor"></a><h3 class="code-header">impl<T, U> Into<U> for T<span class="where fmt-newline">where<br> U: From<T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.into" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.into" class="anchor"></a><h4 class="code-header">fn <a class="fnname">into</a>(self) -> U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p> |
| <p>That is, this conversion is whatever the implementation of |
| <code>[From]<T> for U</code> chooses to do.</p> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-Connection%3CT%2C%20B%3E" class="impl has-srclink"><a href="#impl-TryFrom%3CU%3E-for-Connection%3CT%2C%20B%3E" class="anchor"></a><h3 class="code-header">impl<T, U> TryFrom<U> for T<span class="where fmt-newline">where<br> U: Into<T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error-1" class="anchor"></a><h4 class="code-header">type <a class="associatedtype">Error</a> = Infallible</h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.try_from" class="anchor"></a><h4 class="code-header">fn <a class="fnname">try_from</a>(value: U) -> Result<T, <T as TryFrom<U>>::Error></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-Connection%3CT%2C%20B%3E" class="impl has-srclink"><a href="#impl-TryInto%3CU%3E-for-Connection%3CT%2C%20B%3E" class="anchor"></a><h3 class="code-header">impl<T, U> TryInto<U> for T<span class="where fmt-newline">where<br> U: TryFrom<T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error" class="anchor"></a><h4 class="code-header">type <a class="associatedtype">Error</a> = <U as TryFrom<T>>::Error</h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.try_into" class="anchor"></a><h4 class="code-header">fn <a class="fnname">try_into</a>(self) -> Result<U, <U as TryFrom<T>>::Error></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-WithSubscriber-for-Connection%3CT%2C%20B%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/tracing/instrument.rs.html#334">source</a><a href="#impl-WithSubscriber-for-Connection%3CT%2C%20B%3E" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="../../tracing/instrument/trait.WithSubscriber.html" title="trait tracing::instrument::WithSubscriber">WithSubscriber</a> for T</h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.with_subscriber" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/tracing/instrument.rs.html#169-171">source</a><a href="#method.with_subscriber" class="anchor"></a><h4 class="code-header">fn <a href="../../tracing/instrument/trait.WithSubscriber.html#method.with_subscriber" class="fnname">with_subscriber</a><S>(self, subscriber: S) -> <a class="struct" href="../../tracing/instrument/struct.WithDispatch.html" title="struct tracing::instrument::WithDispatch">WithDispatch</a><Self><span class="where fmt-newline">where<br> S: Into<<a class="struct" href="../../tracing_core/dispatcher/struct.Dispatch.html" title="struct tracing_core::dispatcher::Dispatch">Dispatch</a>>,</span></h4></section></summary><div class='docblock'>Attaches the provided <a href="../../tracing_core/subscriber/trait.Subscriber.html"><code>Subscriber</code></a> to this type, returning a |
| <a href="../../tracing/instrument/struct.WithDispatch.html" title="WithDispatch"><code>WithDispatch</code></a> wrapper. <a href="../../tracing/instrument/trait.WithSubscriber.html#method.with_subscriber">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.with_current_subscriber" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/tracing/instrument.rs.html#221">source</a><a href="#method.with_current_subscriber" class="anchor"></a><h4 class="code-header">fn <a href="../../tracing/instrument/trait.WithSubscriber.html#method.with_current_subscriber" class="fnname">with_current_subscriber</a>(self) -> <a class="struct" href="../../tracing/instrument/struct.WithDispatch.html" title="struct tracing::instrument::WithDispatch">WithDispatch</a><Self></h4></section></summary><div class='docblock'>Attaches the current <a href="../../tracing/dispatcher/index.html#setting-the-default-subscriber">default</a> <a href="../../tracing_core/subscriber/trait.Subscriber.html"><code>Subscriber</code></a> to this type, returning a |
| <a href="../../tracing/instrument/struct.WithDispatch.html" title="WithDispatch"><code>WithDispatch</code></a> wrapper. <a href="../../tracing/instrument/trait.WithSubscriber.html#method.with_current_subscriber">Read more</a></div></details></div></details></div></section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="h2" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
