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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 type that can be stored in `Value`s and is optional."><title>ValueTypeOptional in glib::value - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-46132b98.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="glib" data-themes="" data-resource-suffix="" data-rustdoc-version="1.85.0 (4d91de4e4 2025-02-17)" data-channel="1.85.0" data-search-js="search-75f5ac3e.js" data-settings-js="settings-0f613d39.js" ><script src="../../static.files/storage-59e33391.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-5f194d8c.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-893ab5e7.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-6580c154.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc trait"><!--[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" title="show sidebar"></button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../glib/index.html">glib</a><span class="version">0.20.9</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Value<wbr>Type<wbr>Optional</a></h2><h3><a href="#foreign-impls">Implementations on Foreign Types</a></h3><ul class="block"><li><a href="#impl-ValueTypeOptional-for-Box%3Cstr%3E" title="Box<str>">Box<str></a></li><li><a href="#impl-ValueTypeOptional-for-PathBuf" title="PathBuf">PathBuf</a></li><li><a href="#impl-ValueTypeOptional-for-String" title="String">String</a></li></ul><h3><a href="#dyn-compatibility">Dyn Compatibility</a></h3><h3><a href="#implementors">Implementors</a></h3></section><div id="rustdoc-modnav"><h2><a href="index.html">In glib::<wbr>value</a></h2></div></div></nav><div class="sidebar-resizer"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><span class="rustdoc-breadcrumbs"><a href="../index.html">glib</a>::<wbr><a href="index.html">value</a></span><h1>Trait <span class="trait">ValueTypeOptional</span><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../src/glib/value.rs.html#81-84">Source</a> </span></div><pre class="rust item-decl"><code>pub trait ValueTypeOptional:
<a class="trait" href="trait.ValueType.html" title="trait glib::value::ValueType">ValueType</a>
+ <a class="trait" href="trait.ToValueOptional.html" title="trait glib::value::ToValueOptional">ToValueOptional</a>
+ <a class="trait" href="trait.FromValueOptional.html" title="trait glib::value::FromValueOptional">FromValueOptional</a><'static>
+ <a class="trait" href="../types/trait.StaticType.html" title="trait glib::types::StaticType">StaticType</a> { }</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A type that can be stored in <code>Value</code>s and is optional.</p>
<p>These are types were storing an <code>Option</code> is valid. Examples are <code>String</code> and all object types.</p>
</div></details><h2 id="dyn-compatibility" class="section-header">Dyn Compatibility<a href="#dyn-compatibility" class="anchor">§</a></h2><div class="dyn-compatibility-info"><p>This trait is <b>not</b> <a href="https://doc.rust-lang.org/1.85.0/reference/items/traits.html#object-safety">dyn compatible</a>.</p><p><i>In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.</i></p></div><h2 id="foreign-impls" class="section-header">Implementations on Foreign Types<a href="#foreign-impls" class="anchor">§</a></h2><section id="impl-ValueTypeOptional-for-Box%3Cstr%3E" class="impl"><a class="src rightside" href="../../src/glib/value.rs.html#965">Source</a><a href="#impl-ValueTypeOptional-for-Box%3Cstr%3E" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.ValueTypeOptional.html" title="trait glib::value::ValueTypeOptional">ValueTypeOptional</a> for <a class="struct" href="https://doc.rust-lang.org/1.85.0/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><<a class="primitive" href="https://doc.rust-lang.org/1.85.0/std/primitive.str.html">str</a>></h3></section><section id="impl-ValueTypeOptional-for-String" class="impl"><a class="src rightside" href="../../src/glib/value.rs.html#928">Source</a><a href="#impl-ValueTypeOptional-for-String" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.ValueTypeOptional.html" title="trait glib::value::ValueTypeOptional">ValueTypeOptional</a> for <a class="struct" href="https://doc.rust-lang.org/1.85.0/alloc/string/struct.String.html" title="struct alloc::string::String">String</a></h3></section><section id="impl-ValueTypeOptional-for-PathBuf" class="impl"><a class="src rightside" href="../../src/glib/value.rs.html#1110">Source</a><a href="#impl-ValueTypeOptional-for-PathBuf" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.ValueTypeOptional.html" title="trait glib::value::ValueTypeOptional">ValueTypeOptional</a> for <a class="struct" href="https://doc.rust-lang.org/1.85.0/std/path/struct.PathBuf.html" title="struct std::path::PathBuf">PathBuf</a></h3></section><h2 id="implementors" class="section-header">Implementors<a href="#implementors" class="anchor">§</a></h2><div id="implementors-list"><section id="impl-ValueTypeOptional-for-GString" class="impl"><a class="src rightside" href="../../src/glib/gstring.rs.html#2300">Source</a><a href="#impl-ValueTypeOptional-for-GString" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.ValueTypeOptional.html" title="trait glib::value::ValueTypeOptional">ValueTypeOptional</a> for <a class="struct" href="../struct.GString.html" title="struct glib::GString">GString</a></h3></section><section id="impl-ValueTypeOptional-for-BoxedValue" class="impl"><a class="src rightside" href="../../src/glib/value.rs.html#1455">Source</a><a href="#impl-ValueTypeOptional-for-BoxedValue" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.ValueTypeOptional.html" title="trait glib::value::ValueTypeOptional">ValueTypeOptional</a> for <a class="struct" href="struct.BoxedValue.html" title="struct glib::value::BoxedValue">BoxedValue</a></h3></section></div><script src="../../trait.impl/glib/value/trait.ValueTypeOptional.js" data-ignore-extern-crates="alloc,std" async></script></section></div></main></body></html>