<!DOCTYPE html><htmllang="en"><head><metacharset="utf-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><metaname="generator"content="rustdoc"><metaname="description"content="Errors that can be returned from methods in this crate."><title>Error in actix_settings - Rust</title><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../static.files/SourceSerif4-Bold-a2c9cd1067f8b328.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><linkrel="stylesheet"href="../static.files/normalize-76eba96aa4d2e634.css"><linkrel="stylesheet"href="../static.files/rustdoc-9ee3a5e31a2afa3e.css"><metaname="rustdoc-vars"data-root-path="../"data-static-root-path="../static.files/"data-current-crate="actix_settings"data-themes=""data-resource-suffix=""data-rustdoc-version="1.75.0-nightly (608e9682f 2023-10-29)"data-channel="nightly"data-search-js="search-8fbf244ebcf71464.js"data-settings-js="settings-74424d7eec62a23e.js"><scriptsrc="../static.files/storage-fec3eaa3851e447d.js"></script><scriptdefersrc="sidebar-items.js"></script><scriptdefersrc="../static.files/main-9dd44ab47b99a0fb.js"></script><noscript><linkrel="stylesheet"href="../static.files/noscript-5d8b3c7633ad77ba.css"></noscript><linkrel="icon"href="https://actix.rs/favicon.ico"></head><bodyclass="rustdoc enum"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><navclass="mobile-topbar"><buttonclass="sidebar-menu-toggle">☰</button><aclass="logo-container"href="../actix_settings/index.html"><imgsrc="https://actix.rs/img/logo.png"alt=""></a></nav><navclass="sidebar"><divclass="sidebar-crate"><aclass="logo-container"href="../actix_settings/index.html"><imgsrc="https://actix.rs/img/logo.png"alt="logo"></a><h2><ahref="../actix_settings/index.html">actix_settings</a><spanclass="version">0.6.0</span></h2></div><h2class="location"><ahref="#">Error</a></h2><divclass="sidebar-elems"><section><h3><ahref="#variants">Variants</a></h3><ulclass="block variant"><li><ahref="#variant.EnvVarError">EnvVarError</a></li><li><ahref="#variant.FileExists">FileExists</a></li><li><ahref="#variant.InvalidValue">InvalidValue</a></li><li><ahref="#variant.IoError">IoError</a></li><li><ahref="#variant.ParseAddressError">ParseAddressError</a></li><li><ahref="#variant.ParseBoolError">ParseBoolError</a></li><li><ahref="#variant.ParseIntError">ParseIntError</a></li><li><ahref="#variant.TomlError">TomlError</a></li></ul><h3><ahref="#trait-implementations">Trait Implementations</a></h3><ulclass="block trait-implementation"><li><ahref="#impl-Debug-for-Error">Debug</a></li><li><ahref="#impl-Display-for-Error">Display</a></li><li><ahref="#impl-Error-for-Error">Error</a></li><li><ahref="#impl-From%3CError%3E-for-Error">From<Error></a></li><li><ahref="#impl-From%3CError%3E-for-Error-1">From<Error></a></li><li><ahref="#impl-From%3CError%3E-for-Error-2">From<Error></a></li><li><ahref="#impl-From%3CParseBoolError%3E-for-Error">From<ParseBoolError></a></li><li><ahref="#impl-From%3CParseIntError%3E-for-Error">From<ParseIntError></a></li><li><ahref="#impl-From%3CVarError%3E-for-Error">From<VarError></a></li></ul><h3><ahref="#synthetic-implementations">Auto Trait Implementations</a></h3><ulclass="block synthetic-implementation"><li><ahref="#impl-RefUnwindSafe-for-Error">!RefUnwindSafe</a></li><li><ahref="#impl-UnwindS
}</code></pre><detailsclass="toggle top-doc"open><summaryclass="hideme"><span>Expand description</span></summary><divclass="docblock"><p>Errors that can be returned from methods in this crate.</p>
</div></details><h2id="variants"class="variants small-section-header">Variants<ahref="#variants"class="anchor">§</a></h2><divclass="variants"><sectionid="variant.EnvVarError"class="variant"><ahref="#variant.EnvVarError"class="anchor">§</a><h3class="code-header">EnvVarError(<aclass="enum"href="https://doc.rust-lang.org/nightly/std/env/enum.VarError.html"title="enum std::env::VarError">VarError</a>)</h3></section><divclass="docblock"><p>Environment variable does not exists or is invalid.</p>
</div><sectionid="variant.FileExists"class="variant"><ahref="#variant.FileExists"class="anchor">§</a><h3class="code-header">FileExists(<aclass="struct"href="https://doc.rust-lang.org/nightly/std/path/struct.PathBuf.html"title="struct std::path::PathBuf">PathBuf</a>)</h3></section><divclass="docblock"><p>File already exists on disk.</p>
</div><sectionid="variant.ParseBoolError"class="variant"><ahref="#variant.ParseBoolError"class="anchor">§</a><h3class="code-header">ParseBoolError(<aclass="struct"href="https://doc.rust-lang.org/nightly/core/str/error/struct.ParseBoolError.html"title="struct core::str::error::ParseBoolError">ParseBoolError</a>)</h3></section><divclass="docblock"><p>Value is not a boolean.</p>
</div><sectionid="variant.ParseIntError"class="variant"><ahref="#variant.ParseIntError"class="anchor">§</a><h3class="code-header">ParseIntError(<aclass="struct"href="https://doc.rust-lang.org/nightly/core/num/error/struct.ParseIntError.html"title="struct core::num::error::ParseIntError">ParseIntError</a>)</h3></section><divclass="docblock"><p>Value is not an integer.</p>
</div><sectionid="variant.ParseAddressError"class="variant"><ahref="#variant.ParseAddressError"class="anchor">§</a><h3class="code-header">ParseAddressError(<aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html"title="struct alloc::string::String">String</a>)</h3></section><divclass="docblock"><p>Value is not an address.</p>
</div><sectionid="variant.TomlError"class="variant"><ahref="#variant.TomlError"class="anchor">§</a><h3class="code-header">TomlError(Error)</h3></section><divclass="docblock"><p>Error deserializing as TOML.</p>
</div></div><h2id="trait-implementations"class="small-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-Error"class="impl"><aclass="src rightside"href="../src/actix_settings/error.rs.html#7">source</a><ahref="#impl-Debug-for-Error"class="anchor">§</a><h3class="code-header">impl <aclass="trait"href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html"title="trait core::fmt::Debug">Debug</a> for <aclass="enum"href="enum.Error.html"title="enum actix_settings::Error">Error</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/actix_settings/error.rs.html#7">source</a><ahref="#method.fmt"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt"class="fn">fmt</a>(&self, f: &mut <aclass="struct"href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html"title="struct core::fmt::Formatter">Formatter</a><'_>) -><aclass="type"href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html"title="type core::fmt::Result">Result</a></h4></section></summary><divclass='docblock'>Formats the value using the given formatter. <ahref="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></div></details></div></details><detailsclass="toggle implementors-toggle"open><summary><sectionid="impl-Display-for-Error"class="impl"><aclass="src rightside"href="../src/actix_settings/error.rs.html#7">source</a><ahref="#impl-Display-for-Error"class="anchor">§</a><h3class="code-header">impl <aclass="trait"href="https://doc.rust-lang.org/nightly/core/fmt/trait.Display.html"title="trait core::fmt::Display">Display</a> for <aclass="enum"href="enum.Error.html"title="enum actix_settings::Error">Error</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/actix_settings/error.rs.html#7">source</a><ahref="#method.fmt-1"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/nightly/core/fmt/trait.Display.html#tymethod.fmt"class="fn">fmt</a>(&self, _derive_more_display_formatter: &mut <aclass="struct"href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html"title="struct core::fmt::Formatter">Formatter</a><'_>) -><aclass="type"href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html"title="type core::fmt::Result">Result</a></h4></section></summary><divclass='docblock'>Formats the value using the given formatter. <ahref="https://doc.rust-lang.org/nightly/core/fmt/trait.Display.html#tymethod.fmt">Read more</a></div></details></div></details><detailsclass="toggle implementors-toggle"open><summary><sectionid="impl-Error-for-Error"class="impl"><aclass="src rightside"href="../src/actix_settings/error.rs.html#7">source</a><ahref="#impl-Error-for-Error"class="anchor">§</a><h3class="code-header">impl <aclass="trait"href="https://doc.rust-lang.org/nightly/core/error/trait.Error.html"title="trait core::error::Error">Error</a> for <aclass="enum"href="enum.Error.html"title="enum actix_settings::Error">Error</a></h3></section></summary><divclass="impl-items"><detailsclass="toggle method-toggle"open><summary><sectionid="method.source"class="method trait-impl"><aclass="src rightside"href="../src/actix_settings/error.rs.html#7">source</a><ahref="#method.source"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/nightly/core/error/trait.Error.html#method.source"class="fn">source</a>(&self) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option
T: ?<aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html"title="trait core::marker::Sized">Sized</a>,</span></h3></section></summary><divclass="impl-items"><detailsclass="toggle method-toggle"open><summary><sectionid="method.borrow_mut"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#217">source</a><ahref="#method.borrow_mut"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut"class="fn">borrow_mut</a>(&mut self) -><aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut T</a></h4></section></summary><divclass='docblock'>Mutably borrows from an owned value. <ahref="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-From%3CT%3E-for-T"class="impl"><aclass="src rightside"href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#763">source</a><ahref="#impl-From%3CT%3E-for-T"class="anchor">§</a><h3class="code-header">impl<T><aclass="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><divclass="impl-items"><detailsclass="toggle method-toggle"open><summary><sectionid="method.from-6"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#766">source</a><ahref="#method.from-6"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from"class="fn">from</a>(t: T) -> T</h4></section></summary><divclass="docblock"><p>Returns the argument unchanged.</p>
</div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-Instrument-for-T"class="impl"><ahref="#impl-Instrument-for-T"class="anchor">§</a><h3class="code-header">impl<T> Instrument for T</h3></section></summary><divclass="impl-items"><detailsclass="toggle method-toggle"open><summary><sectionid="method.instrument"class="method trait-impl"><ahref="#method.instrument"class="anchor">§</a><h4class="code-header">fn <aclass="fn">instrument</a>(self, span: Span) -> Instrumented<Self></h4></section></summary><divclass='docblock'>Instruments this type with the provided [<code>Span</code>], returning an
<code>Instrumented</code> wrapper. <a>Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.in_current_span"class="method trait-impl"><ahref="#method.in_current_span"class="anchor">§</a><h4class="code-header">fn <aclass="fn">in_current_span</a>(self) -> Instrumented<Self></h4></section></summary><divclass='docblock'>Instruments this type with the <ahref="super::Span::current()">current</a><ahref="crate::Span"><code>Span</code></a>, returning an
<code><ahref="https://doc.rust-lang.org/nightly/core/convert/trait.From.html"title="trait core::convert::From">From</a><T> for U</code> chooses to do.</p>
T: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/fmt/trait.Display.html"title="trait core::fmt::Display">Display</a> + ?<aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html"title="trait core::marker::Sized">Sized</a>,</span></h3></section></summary><divclass="impl-items"><detailsclass="toggle method-toggle"open><summary><sectionid="method.to_string"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/nightly/src/alloc/string.rs.html#2606">source</a><ahref="#method.to_string"class="anchor">§</a><h4class="code-header">default fn <ahref="https://doc.rust-lang.org/nightly/alloc/string/trait.ToString.html#tymethod.to_string"class="fn">to_string</a>(&self) -><aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html"title="struct alloc::string::String">String</a></h4></section></summary><divclass='docblock'>Converts the given value to a <code>String</code>. <ahref="https://doc.rust-lang.org/nightly/alloc/string/trait.ToString.html#tymethod.to_string">Read more</a></div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-TryFrom%3CU%3E-for-T"class="impl"><aclass="src rightside"href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#803-805">source</a><ahref="#impl-TryFrom%3CU%3E-for-T"class="anchor">§</a><h3class="code-header">impl<T, U><aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><U> for T<spanclass="where fmt-newline">where
U: <aclass="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><divclass="impl-items"><detailsclass="toggle"open><summary><sectionid="associatedtype.Error"class="associatedtype trait-impl"><ahref="#associatedtype.Error"class="anchor">§</a><h4class="code-header">type <ahref="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error"class="associatedtype">Error</a> = <aclass="enum"href="https://doc.rust-lang.org/nightly/core/convert/enum.Infallible.html"title="enum core::convert::Infallible">Infallible</a></h4></section></summary><divclass='docblock'>The type returned in the event of a conversion error.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.try_from"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#810">source</a><ahref="#method.try_from"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#tymethod.try_from"class="fn">try_from</a>(value: U) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html"title="enum core::result::Result">Result</a><T, <T as <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><U>>::<aclass="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><divclass='docblock'>Performs the conversion.</div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-TryInto%3CU%3E-for-T"class="impl"><aclass="src rightside"href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#788-790">source</a><ahref="#impl-TryInto%3CU%3E-for-T"class="anchor">§</a><h3class="code-header">impl<T, U><aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html"title="trait core::convert::TryInto">TryInto</a><U> for T<spanclass="where fmt-newline">where
U: <aclass="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><divclass="impl-items"><detailsclass="toggle"open><summary><sectionid="associatedtype.Error-1"class="associatedtype trait-impl"><ahref="#associatedtype.Error-1"class="anchor">§</a><h4class="code-header">type <ahref="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#associatedtype.Error"class="associatedtype">Error</a> = <U as <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>>::<aclass="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><divclass='docblock'>The type returned in the event of a conversion error.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.try_into"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#795">source</a><ahref="#method.try_into"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#tymethod.try_into"class="fn">try_into</a>(self) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html"title="enum core::result::Result">Result</a><U, <U as <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>>::<aclass="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><divclass='docblock'>Performs the conversion.</div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-VZip%3CV%3E-for-T"class="impl"><ahref="#impl-VZip%3CV%3E-for-T"class="anchor">§</a><h3class="code-header">impl<V, T> VZip<V> for T<spanclass="where fmt-newline">where
S: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><Dispatch>,</span></h4></section></summary><divclass='docblock'>Attaches the provided <ahref="super::Subscriber"><code>Subscriber</code></a> to this type, returning a
[<code>WithDispatch</code>] wrapper. <a>Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.with_current_subscriber"class="method trait-impl"><ahref="#method.with_current_subscriber"class="anchor">§</a><h4class="code-header">fn <aclass="fn">with_current_subscriber</a>(self) -> WithDispatch<Self></h4></section></summary><divclass='docblock'>Attaches the current <ahref="crate::dispatcher#setting-the-default-subscriber">default</a><ahref="super::Subscriber"><code>Subscriber</code></a> to this type, returning a