180 lines
9.3 KiB
HTML
180 lines
9.3 KiB
HTML
|
<!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="API documentation for the Rust `to_value` fn in crate `serde_json`.">
|
|||
|
|
<meta name="keywords" content="rust, rustlang, rust-lang, to_value">
|
|||
|
|
|
|||
|
|
<title>serde_json::value::to_value - Rust</title>
|
|||
|
|
|
|||
|
|
<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="../../dark.css">
|
|||
|
|
<link rel="stylesheet" type="text/css" href="../../main.css" id="themeStyle">
|
|||
|
|
<script src="../../storage.js"></script>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
</head>
|
|||
|
|
<body class="rustdoc fn">
|
|||
|
|
<!--[if lte IE 8]>
|
|||
|
|
<div class="warning">
|
|||
|
|
This old browser is unsupported and will most likely display funky
|
|||
|
|
things.
|
|||
|
|
</div>
|
|||
|
|
<![endif]-->
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<nav class="sidebar">
|
|||
|
|
<div class="sidebar-menu">☰</div>
|
|||
|
|
|
|||
|
|
<p class='location'><a href='../index.html'>serde_json</a>::<wbr><a href='index.html'>value</a></p><script>window.sidebarCurrent = {name: 'to_value', ty: 'fn', relpath: ''};</script><script defer src="sidebar-items.js"></script>
|
|||
|
|
</nav>
|
|||
|
|
|
|||
|
|
<div class="theme-picker">
|
|||
|
|
<button id="theme-picker" aria-label="Pick another theme!">
|
|||
|
|
<img src="../../brush.svg" width="18" alt="Pick another theme!">
|
|||
|
|
</button>
|
|||
|
|
<div id="theme-choices"></div>
|
|||
|
|
</div>
|
|||
|
|
<script src="../../theme.js"></script>
|
|||
|
|
<nav class="sub">
|
|||
|
|
<form class="search-form js-only">
|
|||
|
|
<div class="search-container">
|
|||
|
|
<input class="search-input" name="search"
|
|||
|
|
autocomplete="off"
|
|||
|
|
placeholder="Click or press ‘S’ to search, ‘?’ for more options…"
|
|||
|
|
type="search">
|
|||
|
|
</div>
|
|||
|
|
</form>
|
|||
|
|
</nav>
|
|||
|
|
|
|||
|
|
<section id='main' class="content">
|
|||
|
|
<h1 class='fqn'><span class='in-band'>Function <a href='../index.html'>serde_json</a>::<wbr><a href='index.html'>value</a>::<wbr><a class="fn" href=''>to_value</a></span><span class='out-of-band'><span id='render-detail'>
|
|||
|
|
<a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
|
|||
|
|
[<span class='inner'>−</span>]
|
|||
|
|
</a>
|
|||
|
|
</span><a class='srclink' href='../../src/serde_json/value/mod.rs.html#1078-1083' title='goto source code'>[src]</a></span></h1>
|
|||
|
|
<pre class='rust fn'>pub fn to_value<T>(value: T) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="enum" href="../../serde_json/value/enum.Value.html" title="enum serde_json::value::Value">Value</a>, <a class="struct" href="../../serde_json/error/struct.Error.html" title="struct serde_json::error::Error">Error</a>> <span class="where fmt-newline">where<br> T: <a class="trait" href="../../serde/ser/trait.Serialize.html" title="trait serde::ser::Serialize">Serialize</a>, </span></pre><div class='docblock'><p>Convert a <code>T</code> into <code>serde_json::Value</code> which is an enum that can represent
|
|||
|
|
any valid JSON data.</p>
|
|||
|
|
|
|||
|
|
<pre class="rust rust-example-rendered">
|
|||
|
|
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">serde</span>;
|
|||
|
|
|
|||
|
|
<span class="attribute">#[<span class="ident">macro_use</span>]</span>
|
|||
|
|
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">serde_derive</span>;
|
|||
|
|
|
|||
|
|
<span class="attribute">#[<span class="ident">macro_use</span>]</span>
|
|||
|
|
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">serde_json</span>;
|
|||
|
|
|
|||
|
|
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">error</span>::<span class="ident">Error</span>;
|
|||
|
|
|
|||
|
|
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Serialize</span>)]</span>
|
|||
|
|
<span class="kw">struct</span> <span class="ident">User</span> {
|
|||
|
|
<span class="ident">fingerprint</span>: <span class="ident">String</span>,
|
|||
|
|
<span class="ident">location</span>: <span class="ident">String</span>,
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
<span class="kw">fn</span> <span class="ident">compare_json_values</span>() <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">Box</span><span class="op"><</span><span class="ident">Error</span><span class="op">>></span> {
|
|||
|
|
<span class="kw">let</span> <span class="ident">u</span> <span class="op">=</span> <span class="ident">User</span> {
|
|||
|
|
<span class="ident">fingerprint</span>: <span class="string">"0xF9BA143B95FF6D82"</span>.<span class="ident">to_owned</span>(),
|
|||
|
|
<span class="ident">location</span>: <span class="string">"Menlo Park, CA"</span>.<span class="ident">to_owned</span>(),
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
<span class="comment">// The type of `expected` is `serde_json::Value`</span>
|
|||
|
|
<span class="kw">let</span> <span class="ident">expected</span> <span class="op">=</span> <span class="macro">json</span><span class="macro">!</span>({
|
|||
|
|
<span class="string">"fingerprint"</span>: <span class="string">"0xF9BA143B95FF6D82"</span>,
|
|||
|
|
<span class="string">"location"</span>: <span class="string">"Menlo Park, CA"</span>,
|
|||
|
|
});
|
|||
|
|
|
|||
|
|
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> <span class="ident">serde_json</span>::<span class="ident">to_value</span>(<span class="ident">u</span>).<span class="ident">unwrap</span>();
|
|||
|
|
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="ident">expected</span>);
|
|||
|
|
|
|||
|
|
<span class="prelude-val">Ok</span>(())
|
|||
|
|
}</pre>
|
|||
|
|
<h1 id="errors" class="section-header"><a href="#errors">Errors</a></h1>
|
|||
|
|
<p>This conversion can fail if <code>T</code>'s implementation of <code>Serialize</code> decides to
|
|||
|
|
fail, or if <code>T</code> contains a map with non-string keys.</p>
|
|||
|
|
|
|||
|
|
<pre class="rust rust-example-rendered">
|
|||
|
|
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">serde_json</span>;
|
|||
|
|
|
|||
|
|
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::<span class="ident">BTreeMap</span>;
|
|||
|
|
|
|||
|
|
<span class="kw">fn</span> <span class="ident">main</span>() {
|
|||
|
|
<span class="comment">// The keys in this map are vectors, not strings.</span>
|
|||
|
|
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">map</span> <span class="op">=</span> <span class="ident">BTreeMap</span>::<span class="ident">new</span>();
|
|||
|
|
<span class="ident">map</span>.<span class="ident">insert</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="number">32</span>, <span class="number">64</span>], <span class="string">"x86"</span>);
|
|||
|
|
|
|||
|
|
<span class="macro">println</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="ident">serde_json</span>::<span class="ident">to_value</span>(<span class="ident">map</span>).<span class="ident">unwrap_err</span>());
|
|||
|
|
}</pre>
|
|||
|
|
</div></section>
|
|||
|
|
<section id='search' class="content hidden"></section>
|
|||
|
|
|
|||
|
|
<section class="footer"></section>
|
|||
|
|
|
|||
|
|
<aside id="help" class="hidden">
|
|||
|
|
<div>
|
|||
|
|
<h1 class="hidden">Help</h1>
|
|||
|
|
|
|||
|
|
<div class="shortcuts">
|
|||
|
|
<h2>Keyboard Shortcuts</h2>
|
|||
|
|
|
|||
|
|
<dl>
|
|||
|
|
<dt><kbd>?</kbd></dt>
|
|||
|
|
<dd>Show this help dialog</dd>
|
|||
|
|
<dt><kbd>S</kbd></dt>
|
|||
|
|
<dd>Focus the search field</dd>
|
|||
|
|
<dt><kbd>↑</kbd></dt>
|
|||
|
|
<dd>Move up in search results</dd>
|
|||
|
|
<dt><kbd>↓</kbd></dt>
|
|||
|
|
<dd>Move down in search results</dd>
|
|||
|
|
<dt><kbd>↹</kbd></dt>
|
|||
|
|
<dd>Switch tab</dd>
|
|||
|
|
<dt><kbd>⏎</kbd></dt>
|
|||
|
|
<dd>Go to active search result</dd>
|
|||
|
|
<dt><kbd>+</kbd></dt>
|
|||
|
|
<dd>Expand all sections</dd>
|
|||
|
|
<dt><kbd>-</kbd></dt>
|
|||
|
|
<dd>Collapse all sections</dd>
|
|||
|
|
</dl>
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
<div class="infos">
|
|||
|
|
<h2>Search Tricks</h2>
|
|||
|
|
|
|||
|
|
<p>
|
|||
|
|
Prefix searches with a type followed by a colon (e.g.
|
|||
|
|
<code>fn:</code>) to restrict the search to a given type.
|
|||
|
|
</p>
|
|||
|
|
|
|||
|
|
<p>
|
|||
|
|
Accepted types are: <code>fn</code>, <code>mod</code>,
|
|||
|
|
<code>struct</code>, <code>enum</code>,
|
|||
|
|
<code>trait</code>, <code>type</code>, <code>macro</code>,
|
|||
|
|
and <code>const</code>.
|
|||
|
|
</p>
|
|||
|
|
|
|||
|
|
<p>
|
|||
|
|
Search functions by type signature (e.g.
|
|||
|
|
<code>vec -> usize</code> or <code>* -> vec</code>)
|
|||
|
|
</p>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</aside>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<script>
|
|||
|
|
window.rootPath = "../../";
|
|||
|
|
window.currentCrate = "serde_json";
|
|||
|
|
</script>
|
|||
|
|
<script src="../../main.js"></script>
|
|||
|
|
<script defer src="../../search-index.js"></script>
|
|||
|
|
</body>
|
|||
|
|
</html>
|