<main><divclass="width-limiter"><navclass="sub"><formclass="search-form"><span></span><divid="sidebar-button"tabindex="-1"><ahref="../tracing/all.html"title="show sidebar"></a></div><inputclass="search-input"name="search"aria-label="Run search in the documentation"autocomplete="off"spellcheck="false"placeholder="Click or press ‘S’ to search, ‘?’ for more options…"type="search"><divid="help-button"tabindex="-1"><ahref="../help.html"title="help">?</a></div><divid="settings-menu"tabindex="-1"><ahref="../settings.html"title="settings"><imgwidth="22"height="22"alt="Change settings"src="../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><sectionid="main-content"class="content"><divclass="main-heading"><h1>Trait <ahref="index.html">tracing</a>::<wbr><aclass="trait"href="#">Value</a><buttonid="copy-path"title="Copy item path to clipboard"><imgsrc="../static.files/clipboard-7571035ce49a181d.svg"width="19"height="18"alt="Copy item path"></button></h1><spanclass="out-of-band"><aclass="src"href="../src/tracing_core/field.rs.html#336">source</a> · <buttonid="toggle-all-docs"title="collapse all docs">[<span>−</span>]</button></span></div><preclass="rust item-decl"><code>pub trait Value: Sealed {
}</code></pre><detailsclass="toggle top-doc"open><summaryclass="hideme"><span>Expand description</span></summary><divclass="docblock"><p>A field value of an erased type.</p>
<p>Implementors of <code>Value</code> may call the appropriate typed recording methods on
the <ahref="field/trait.Visit.html"title="trait tracing::field::Visit">visitor</a> passed to their <code>record</code> method in order to indicate how
their data should be recorded.</p>
</div></details><h2id="required-methods"class="section-header">Required Methods<ahref="#required-methods"class="anchor">§</a></h2><divclass="methods"><detailsclass="toggle method-toggle"open><summary><sectionid="tymethod.record"class="method"><aclass="src rightside"href="../src/tracing_core/field.rs.html#338">source</a><h4class="code-header">fn <ahref="#tymethod.record"class="fn">record</a>(&self, key: &<aclass="struct"href="field/struct.Field.html"title="struct tracing::field::Field">Field</a>, visitor: &mut dyn <aclass="trait"href="field/trait.Visit.html"title="trait tracing::field::Visit">Visit</a>)</h4></section></summary><divclass="docblock"><p>Visits this value with the given <code>Visitor</code>.</p>
</div></details></div><h2id="trait-implementations"class="section-header">Trait Implementations<ahref="#trait-implementations"class="anchor">§</a></h2><divid="trait-implementations-list"><detailsclass="toggle implementors-toggle"open><summary><sectionid="impl-Debug-for-dyn+Value"class="impl"><aclass="src rightside"href="../src/tracing_core/field.rs.html#638">source</a><ahref="#impl-Debug-for-dyn+Value"class="anchor">§</a><h3class="code-header">impl <aclass="trait"href="https://doc.rust-lang.org/1.78.0/core/fmt/trait.Debug.html"title="trait core::fmt::Debug">Debug</a> for dyn <aclass="trait"href="trait.Value.html"title="trait tracing::Value">Value</a></h3></section></summary><divclass="impl-items"><detailsclass="toggle method-toggle"open><summary><sectionid="method.fmt-1"class="method trait-impl"><aclass="src rightside"href="../src/tracing_core/field.rs.html#639">source</a><ahref="#method.fmt-1"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.78.0/core/fmt/trait.Debug.html#tymethod.fmt"class="fn">fmt</a>(&self, f: &mut <aclass="struct"href="https://doc.rust-lang.org/1.78.0/core/fmt/struct.Formatter.html"title="struct core::fmt::Formatter">Formatter</a><'_>) -><aclass="enum"href="https://doc.rust-lang.org/1.78.0/core/result/enum.Result.html"title="enum core::result::Result">Result</a><<aclass="primitive"href="https://doc.rust-lang.org/1.78.0/std/primitive.unit.html">()</a>, <aclass="struct"href="https://doc.rust-lang.org/1.78.0/core/fmt/struct.Error.html"title="struct core::fmt::Error">Error</a>></h4></section></summary><divclass='docblock'>Formats the value using the given formatter. <ahref="https://doc.rust-lang.org/1.78.0/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></div></details></div></details><detailsclass="toggle implementors-toggle"open><summary><sectionid="impl-Display-for-dyn+Value"class="impl"><aclass="src rightside"href="../src/tracing_core/field.rs.html#667">source</a><ahref="#impl-Display-for-dyn+Value"class="anchor">§</a><h3class="code-header">impl <aclass="trait"href="https://doc.rust-lang.org/1.78.0/core/fmt/trait.Display.html"title="trait core::fmt::Display">Display</a> for dyn <aclass="trait"href="trait.Value.html"title="trait tracing::Value">Value</a></h3></section></summary><divclass="impl-items"><detailsclass="toggle method-toggle"open><summary><sectionid="method.fmt"class="method trait-impl"><aclass="src rightside"href="../src/tracing_core/field.rs.html#668">source</a><ahref="#method.fmt"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.78.0/core/fmt/trait.Display.html#tymethod.fmt"class="fn">fmt</a>(&self, f: &mut <aclass="struct"href="https://doc.rust-lang.org/1.78.0/core/fmt/struct.Formatter.html"title="struct core::fmt::Formatter">Formatter</a><'_>) -><aclass="enum"href="https://doc.rust-lang.org/1.78.0/core/result/enum.Result.html"title="enum core::result::Result">Result</a><<aclass="primitive"href="https://doc.rust-lang.org/1.78.0/std/primitive.unit.html">()</a>, <aclass="struct"href="https://doc.rust-lang.org/1.78.0/core/fmt/struct.Error.html"title="struct core::fmt::Error">Error</a>></h4></section></summary><divclass='docblock'>Formats the value using the given formatter. <ahref="https://doc.rust-lang.org/1.78.0/core/fmt/trait.Display.html#tymethod.fmt">Read more</a></div></details></div></details></div><h2id="foreign-impls"class="section-header">Implementations on Foreign Types<ahref="#foreign-impls"class="anchor">§</a></h2><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-Value-for-bool"class="impl"><aclass="src rightside"href="../src/tracing_core/field.rs.html#517-526">source</a><ahref="#impl-Value-for-bool"class="anchor">§</a><h3class="code-header">impl <aclass="trait"href="trait.Value.html"title="trait tracing::Value">Value</a> for <aclass="primitive"href="https://doc.rust-lang.org/1.78.0/std/primitive.bool.html">bool</a></h3></section></su
