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<!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="A builder for a connection pool."><meta name="keywords" content="rust, rustlang, rust-lang, Builder"><title>Builder in r2d2 - 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" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../dark.css" disabled><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../storage.js"></script><script src="../crates.js"></script><script defer src="../main.js"></script>
<noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../favicon.svg"></head><body class="rustdoc struct"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../r2d2/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div>
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</a><h2 class="location"><a href="#">Builder</a></h2><div class="sidebar-elems"><section><div class="block"><h3 class="sidebar-title"><a href="#implementations">Methods</a></h3><ul><li><a href="#method.build">build</a></li><li><a href="#method.build_unchecked">build_unchecked</a></li><li><a href="#method.connection_customizer">connection_customizer</a></li><li><a href="#method.connection_timeout">connection_timeout</a></li><li><a href="#method.error_handler">error_handler</a></li><li><a href="#method.event_handler">event_handler</a></li><li><a href="#method.idle_timeout">idle_timeout</a></li><li><a href="#method.max_lifetime">max_lifetime</a></li><li><a href="#method.max_size">max_size</a></li><li><a href="#method.min_idle">min_idle</a></li><li><a href="#method.new">new</a></li><li><a href="#method.test_on_check_out">test_on_check_out</a></li><li><a href="#method.thread_pool">thread_pool</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#trait-implementations">Trait Implementations</a></h3><ul><li><a href="#impl-Debug">Debug</a></li><li><a href="#impl-Default">Default</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul><li><a href="#impl-RefUnwindSafe">!RefUnwindSafe</a></li><li><a href="#impl-Send">Send</a></li><li><a href="#impl-Sync">Sync</a></li><li><a href="#impl-Unpin">Unpin</a></li><li><a href="#impl-UnwindSafe">!UnwindSafe</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#blanket-implementations">Blanket Implementations</a></h3><ul><li><a href="#impl-Any">Any</a></li><li><a href="#impl-Borrow%3CT%3E">Borrow<T></a></li><li><a href="#impl-BorrowMut%3CT%3E">BorrowMut<T></a></li><li><a href="#impl-From%3CT%3E">From<T></a></li><li><a href="#impl-Into%3CU%3E">Into<U></a></li><li><a href="#impl-TryFrom%3CU%3E">TryFrom<U></a></li><li><a href="#impl-TryInto%3CU%3E">TryInto<U></a></li></ul></div></section><h2 class="location"><a href="index.html">In r2d2</a></h2><div id="sidebar-vars" data-name="Builder" data-ty="struct" data-relpath=""></div><script defer src="sidebar-items.js"></script></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../r2d2/index.html"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></a><nav class="sub"><div class="theme-picker hidden"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu" title="themes"><img width="22" height="22" alt="Pick another theme!" src="../brush.svg"></button><div id="theme-choices" role="menu"></div></div><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"><button type="button" id="help-button" title="help">?</button><a id="settings-menu" href="../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../wheel.svg"></a></div></form></nav></div><section id="main-content" class="content"><div class="main-heading">
<h1 class="fqn"><span class="in-band">Struct <a href="index.html">r2d2</a>::<wbr><a class="struct" href="#">Builder</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></span></h1><span class="out-of-band"><a class="srclink" href="../src/r2d2/config.rs.html#13-29">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="docblock item-decl"><pre class="rust struct"><code>pub struct Builder<M> <span class="where fmt-newline">where<br> M: <a class="trait" href="trait.ManageConnection.html" title="trait r2d2::ManageConnection">ManageConnection</a>, </span> { /* private fields */ }</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A builder for a connection pool.</p>
</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" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../src/r2d2/config.rs.html#72-268">source</a></span><a href="#impl" class="anchor"></a><h3 class="code-header in-band">impl<M> <a class="struct" href="struct.Builder.html" title="struct r2d2::Builder">Builder</a><M> <span class="where fmt-newline">where<br> M: <a class="trait" href="trait.ManageConnection.html" title="trait r2d2::ManageConnection">ManageConnection</a>, </span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.new" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/r2d2/config.rs.html#79-81">source</a></span><a href="#method.new" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.new" class="fnname">new</a>() -> <a class="struct" href="struct.Builder.html" title="struct r2d2::Builder">Builder</a><M></h4></section></summary><div class="docblock"><p>Constructs a new <code>Builder</code>.</p>
<p>Parameters are initialized with their default values.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.max_size" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/r2d2/config.rs.html#90-94">source</a></span><a href="#method.max_size" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.max_size" class="fnname">max_size</a>(self, max_size: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a>) -> <a class="struct" href="struct.Builder.html" title="struct r2d2::Builder">Builder</a><M></h4></section></summary><div class="docblock"><p>Sets the maximum number of connections managed by the pool.</p>
<p>Defaults to 10.</p>
<h5 id="panics"><a href="#panics">Panics</a></h5>
<p>Panics if <code>max_size</code> is 0.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.min_idle" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/r2d2/config.rs.html#102-105">source</a></span><a href="#method.min_idle" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.min_idle" class="fnname">min_idle</a>(self, min_idle: <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a>>) -> <a class="struct" href="struct.Builder.html" title="struct r2d2::Builder">Builder</a><M></h4></section></summary><div class="docblock"><p>Sets the minimum idle connection count maintained by the pool.</p>
<p>If set, the pool will try to maintain at least this many idle
connections at all times, while respecting the value of <code>max_size</code>.</p>
<p>Defaults to <code>None</code> (equivalent to the value of <code>max_size</code>).</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.thread_pool" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/r2d2/config.rs.html#111-114">source</a></span><a href="#method.thread_pool" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.thread_pool" class="fnname">thread_pool</a>(self, thread_pool: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/sync/struct.Arc.html" title="struct alloc::sync::Arc">Arc</a><<a class="struct" href="../scheduled_thread_pool/struct.ScheduledThreadPool.html" title="struct scheduled_thread_pool::ScheduledThreadPool">ScheduledThreadPool</a>>) -> <a class="struct" href="struct.Builder.html" title="struct r2d2::Builder">Builder</a><M></h4></section></summary><div class="docblock"><p>Sets the thread pool used for asynchronous operations such as connection
creation.</p>
<p>Defaults to a new pool with 3 threads.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.test_on_check_out" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/r2d2/config.rs.html#120-123">source</a></span><a href="#method.test_on_check_out" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.test_on_check_out" class="fnname">test_on_check_out</a>(self, test_on_check_out: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>) -> <a class="struct" href="struct.Builder.html" title="struct r2d2::Builder">Builder</a><M></h4></section></summary><div class="docblock"><p>If true, the health of a connection will be verified via a call to
<code>ConnectionManager::is_valid</code> before it is checked out of the pool.</p>
<p>Defaults to true.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.max_lifetime" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/r2d2/config.rs.html#138-142">source</a></span><a href="#method.max_lifetime" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.max_lifetime" class="fnname">max_lifetime</a>(self, max_lifetime: <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="struct" href="https://doc.rust-lang.org/nightly/core/time/struct.Duration.html" title="struct core::time::Duration">Duration</a>>) -> <a class="struct" href="struct.Builder.html" title="struct r2d2::Builder">Builder</a><M></h4></section></summary><div class="docblock"><p>Sets the maximum lifetime of connections in the pool.</p>
<p>If set, connections will be closed after existing for at most 30 seconds
beyond this duration.</p>
<p>If a connection reaches its maximum lifetime while checked out it will
be closed when it is returned to the pool.</p>
<p>Defaults to 30 minutes.</p>
<h5 id="panics-1"><a href="#panics-1">Panics</a></h5>
<p>Panics if <code>max_lifetime</code> is the zero <code>Duration</code>.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.idle_timeout" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/r2d2/config.rs.html#154-158">source</a></span><a href="#method.idle_timeout" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.idle_timeout" class="fnname">idle_timeout</a>(self, idle_timeout: <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="struct" href="https://doc.rust-lang.org/nightly/core/time/struct.Duration.html" title="struct core::time::Duration">Duration</a>>) -> <a class="struct" href="struct.Builder.html" title="struct r2d2::Builder">Builder</a><M></h4></section></summary><div class="docblock"><p>Sets the idle timeout used by the pool.</p>
<p>If set, connections will be closed after sitting idle for at most 30
seconds beyond this duration.</p>
<p>Defaults to 10 minutes.</p>
<h5 id="panics-2"><a href="#panics-2">Panics</a></h5>
<p>Panics if <code>idle_timeout</code> is the zero <code>Duration</code>.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.connection_timeout" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/r2d2/config.rs.html#170-177">source</a></span><a href="#method.connection_timeout" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.connection_timeout" class="fnname">connection_timeout</a>(self, connection_timeout: <a class="struct" href="https://doc.rust-lang.org/nightly/core/time/struct.Duration.html" title="struct core::time::Duration">Duration</a>) -> <a class="struct" href="struct.Builder.html" title="struct r2d2::Builder">Builder</a><M></h4></section></summary><div class="docblock"><p>Sets the connection timeout used by the pool.</p>
<p>Calls to <code>Pool::get</code> will wait this long for a connection to become
available before returning an error.</p>
<p>Defaults to 30 seconds.</p>
<h5 id="panics-3"><a href="#panics-3">Panics</a></h5>
<p>Panics if <code>connection_timeout</code> is the zero duration</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.error_handler" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/r2d2/config.rs.html#182-185">source</a></span><a href="#method.error_handler" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.error_handler" class="fnname">error_handler</a>(<br> self, <br> error_handler: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><dyn <a class="trait" href="trait.HandleError.html" title="trait r2d2::HandleError">HandleError</a><M::<a class="associatedtype" href="trait.ManageConnection.html#associatedtype.Error" title="type r2d2::ManageConnection::Error">Error</a>>><br>) -> <a class="struct" href="struct.Builder.html" title="struct r2d2::Builder">Builder</a><M></h4></section></summary><div class="docblock"><p>Sets the handler for errors reported in the pool.</p>
<p>Defaults to the <code>LoggingErrorHandler</code>.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.event_handler" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/r2d2/config.rs.html#190-193">source</a></span><a href="#method.event_handler" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.event_handler" class="fnname">event_handler</a>(self, event_handler: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><dyn <a class="trait" href="event/trait.HandleEvent.html" title="trait r2d2::event::HandleEvent">HandleEvent</a>>) -> <a class="struct" href="struct.Builder.html" title="struct r2d2::Builder">Builder</a><M></h4></section></summary><div class="docblock"><p>Sets the handler for events reported by the pool.</p>
<p>Defaults to the <code>NopEventHandler</code>.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.connection_customizer" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/r2d2/config.rs.html#198-204">source</a></span><a href="#method.connection_customizer" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.connection_customizer" class="fnname">connection_customizer</a>(<br> self, <br> connection_customizer: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><dyn <a class="trait" href="trait.CustomizeConnection.html" title="trait r2d2::CustomizeConnection">CustomizeConnection</a><M::<a class="associatedtype" href="trait.ManageConnection.html#associatedtype.Connection" title="type r2d2::ManageConnection::Connection">Connection</a>, M::<a class="associatedtype" href="trait.ManageConnection.html#associatedtype.Error" title="type r2d2::ManageConnection::Error">Error</a>>><br>) -> <a class="struct" href="struct.Builder.html" title="struct r2d2::Builder">Builder</a><M></h4></section></summary><div class="docblock"><p>Sets the connection customizer used by the pool.</p>
<p>Defaults to the <code>NopConnectionCustomizer</code>.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.build" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/r2d2/config.rs.html#226-230">source</a></span><a href="#method.build" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.build" class="fnname">build</a>(self, manager: M) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="struct.Pool.html" title="struct r2d2::Pool">Pool</a><M>, <a class="struct" href="struct.Error.html" title="struct r2d2::Error">Error</a>></h4></section></summary><div class="docblock"><p>Consumes the builder, returning a new, initialized pool.</p>
<p>It will block until the pool has established its configured minimum
number of connections, or it times out.</p>
<h5 id="errors"><a href="#errors">Errors</a></h5>
<p>Returns an error if the pool is unable to open its minimum number of
connections.</p>
<h5 id="panics-4"><a href="#panics-4">Panics</a></h5>
<p>Panics if <code>min_idle</code> is greater than <code>max_size</code>.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.build_unchecked" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/r2d2/config.rs.html#240-267">source</a></span><a href="#method.build_unchecked" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.build_unchecked" class="fnname">build_unchecked</a>(self, manager: M) -> <a class="struct" href="struct.Pool.html" title="struct r2d2::Pool">Pool</a><M></h4></section></summary><div class="docblock"><p>Consumes the builder, returning a new pool.</p>
<p>Unlike <code>build</code>, this method does not wait for any connections to be
established before returning.</p>
<h5 id="panics-5"><a href="#panics-5">Panics</a></h5>
<p>Panics if <code>min_idle</code> is greater than <code>max_size</code>.</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" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../src/r2d2/config.rs.html#31-48">source</a></span><a href="#impl-Debug" class="anchor"></a><h3 class="code-header in-band">impl<M> <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="struct.Builder.html" title="struct r2d2::Builder">Builder</a><M> <span class="where fmt-newline">where<br> M: <a class="trait" href="trait.ManageConnection.html" title="trait r2d2::ManageConnection">ManageConnection</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"><span class="rightside"><a class="srclink" href="../src/r2d2/config.rs.html#35-47">source</a></span><a href="#method.fmt" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt" class="fnname">fmt</a>(&self, fmt: &mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a><'_>) -> <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class='docblock'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Default" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../src/r2d2/config.rs.html#50-70">source</a></span><a href="#impl-Default" class="anchor"></a><h3 class="code-header in-band">impl<M> <a class="trait" href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html" title="trait core::default::Default">Default</a> for <a class="struct" href="struct.Builder.html" title="struct r2d2::Builder">Builder</a><M> <span class="where fmt-newline">where<br> M: <a class="trait" href="trait.ManageConnection.html" title="trait r2d2::ManageConnection">ManageConnection</a>, </span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.default" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="../src/r2d2/config.rs.html#54-69">source</a></span><a href="#method.default" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html#tymethod.default" class="fnname">default</a>() -> <a class="struct" href="struct.Builder.html" title="struct r2d2::Builder">Builder</a><M></h4></section></summary><div class='docblock'><p>Returns the “default value” for a type. <a href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html#tymethod.default">Read more</a></p>
</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" class="impl has-srclink"><a href="#impl-RefUnwindSafe" class="anchor"></a><h3 class="code-header in-band">impl<M> !<a class="trait" href="https://doc.rust-lang.org/nightly/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.Builder.html" title="struct r2d2::Builder">Builder</a><M></h3></section><section id="impl-Send" class="impl has-srclink"><a href="#impl-Send" class="anchor"></a><h3 class="code-header in-band">impl<M> <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.Builder.html" title="struct r2d2::Builder">Builder</a><M></h3></section><section id="impl-Sync" class="impl has-srclink"><a href="#impl-Sync" class="anchor"></a><h3 class="code-header in-band">impl<M> <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.Builder.html" title="struct r2d2::Builder">Builder</a><M></h3></section><section id="impl-Unpin" class="impl has-srclink"><a href="#impl-Unpin" class="anchor"></a><h3 class="code-header in-band">impl<M> <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.Builder.html" title="struct r2d2::Builder">Builder</a><M> <span class="where fmt-newline">where<br> M: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>, </span></h3></section><section id="impl-UnwindSafe" class="impl has-srclink"><a href="#impl-UnwindSafe" class="anchor"></a><h3 class="code-header in-band">impl<M> !<a class="trait" href="https://doc.rust-lang.org/nightly/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.Builder.html" title="struct r2d2::Builder">Builder</a><M></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" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/any.rs.html#132-136">source</a></span><a href="#impl-Any" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T <span class="where fmt-newline">where<br> T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </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"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/any.rs.html#133">source</a></span><a href="#method.type_id" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id" class="fnname">type_id</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></h4></section></summary><div class='docblock'><p>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id">Read more</a></p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#209-214">source</a></span><a href="#impl-Borrow%3CT%3E" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><T> for T <span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </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="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#211">source</a></span><a href="#method.borrow" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow" class="fnname">borrow</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>T</h4></section></summary><div class='docblock'><p>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#218-222">source</a></span><a href="#impl-BorrowMut%3CT%3E" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a><T> for T <span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </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="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#219">source</a></span><a href="#method.borrow_mut" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fnname">borrow_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>T</h4></section></summary><div class='docblock'><p>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-From%3CT%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#557-562">source</a></span><a href="#impl-From%3CT%3E" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><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="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#559">source</a></span><a href="#method.from" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from" 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-Into%3CU%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#541-552">source</a></span><a href="#impl-Into%3CU%3E" class="anchor"></a><h3 class="code-header in-band">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><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="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#549">source</a></span><a href="#method.into" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html#tymethod.into" 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><a href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="From">From</a><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" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#598-607">source</a></span><a href="#impl-TryFrom%3CU%3E" class="anchor"></a><h3 class="code-header in-band">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><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 href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/nightly/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></h4></section></summary><div class='docblock'><p>The type returned in the event of a conversion error.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#604">source</a></span><a href="#method.try_from" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#tymethod.try_from" class="fnname">try_from</a>(value: U) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, <T as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'><p>Performs the conversion.</p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#583-592">source</a></span><a href="#impl-TryInto%3CU%3E" class="anchor"></a><h3 class="code-header in-band">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><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 href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = <U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><div class='docblock'><p>The type returned in the event of a conversion error.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#589">source</a></span><a href="#method.try_into" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#tymethod.try_into" class="fnname">try_into</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><U, <U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'><p>Performs the conversion.</p>
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