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274 lines
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<!DOCTYPE html>
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<meta name="generator" content="rustdoc">
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<meta name="description" content="API documentation for the Rust `toml` crate.">
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<meta name="keywords" content="rust, rustlang, rust-lang, toml">
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<title>toml - Rust</title>
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<link rel="stylesheet" type="text/css" href="../normalize.css">
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<!--[if lte IE 8]>
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This old browser is unsupported and will most likely display funky
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things.
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<![endif]-->
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<nav class="sidebar">
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<p class='location'>Crate toml</p><div class="block items"><ul><li><a href="#reexports">Reexports</a></li><li><a href="#modules">Modules</a></li></ul></div><p class='location'></p><script>window.sidebarCurrent = {name: 'toml', ty: 'mod', relpath: '../'};</script>
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<input class="search-input" name="search"
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autocomplete="off"
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placeholder="Click or press ‘S’ to search, ‘?’ for more options…"
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type="search">
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</nav>
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<section id='main' class="content">
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<h1 class='fqn'><span class='in-band'>Crate <a class="mod" href=''>toml</a></span><span class='out-of-band'><span id='render-detail'>
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<a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
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[<span class='inner'>−</span>]
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</a>
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</span><a class='srclink' href='../src/toml/lib.rs.html#1-168' title='goto source code'>[src]</a></span></h1>
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<div class='docblock'><p>A <a href="https://github.com/toml-lang/toml">TOML</a>-parsing library</p>
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<p>This library implements a <a href="https://github.com/toml-lang/toml">TOML</a> v0.4.0 compatible parser,
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primarily supporting the <a href="https://serde.rs/"><code>serde</code></a> library for encoding/decoding
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various types in Rust.</p>
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<p>TOML itself is a simple, ergonomic, and readable configuration format:</p>
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<pre><code class="language-toml">[package]
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name = "toml"
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version = "0.2.1"
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authors = ["Alex Crichton <alex@alexcrichton.com>"]
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[dependencies]
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serde = "1.0"
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</code></pre>
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<p>The TOML format tends to be relatively common throughout the Rust community
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for configuration, notably being used by <a href="https://crates.io/">Cargo</a>, Rust's package manager.</p>
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<h2 id='toml-values' class='section-header'><a href='#toml-values'>TOML values</a></h2>
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<p>A value in TOML is represented with the <code>Value</code> enum in this crate:</p>
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<pre class="rust rust-example-rendered">
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<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">Value</span> {
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<span class="ident">String</span>(<span class="ident">String</span>),
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<span class="ident">Integer</span>(<span class="ident">i64</span>),
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<span class="ident">Float</span>(<span class="ident">f64</span>),
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<span class="ident">Boolean</span>(<span class="ident">bool</span>),
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<span class="ident">Datetime</span>(<span class="ident">Datetime</span>),
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<span class="ident">Array</span>(<span class="ident">Array</span>),
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<span class="ident">Table</span>(<span class="ident">Table</span>),
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}</pre>
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<p>TOML is similar to JSON with the notable addition of a <code>Datetime</code>
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type. In general, TOML and JSON are interchangeable in terms of
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formats.</p>
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<h2 id='parsing-toml' class='section-header'><a href='#parsing-toml'>Parsing TOML</a></h2>
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<p>The easiest way to parse a TOML document is via the <code>Value</code> type:</p>
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<pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">toml</span>::<span class="ident">Value</span>;
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<span class="kw">let</span> <span class="ident">value</span> <span class="op">=</span> <span class="string">"foo = 'bar'"</span>.<span class="ident">parse</span>::<span class="op"><</span><span class="ident">Value</span><span class="op">></span>().<span class="ident">unwrap</span>();
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">value</span>[<span class="string">"foo"</span>].<span class="ident">as_str</span>(), <span class="prelude-val">Some</span>(<span class="string">"bar"</span>));</pre>
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<p>The <code>Value</code> type implements a number of convenience methods and
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traits; the example above uses <code>FromStr</code> to parse a <code>str</code> into a
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<code>Value</code>.</p>
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<h2 id='deserialization-and-serialization' class='section-header'><a href='#deserialization-and-serialization'>Deserialization and Serialization</a></h2>
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<p>This crate supports <a href="https://serde.rs/"><code>serde</code></a> 1.0 with a number of
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implementations of the <code>Deserialize</code>, <code>Serialize</code>, <code>Deserializer</code>, and
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<code>Serializer</code> traits. Namely, you'll find:</p>
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<ul>
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<li><code>Deserialize for Value</code></li>
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<li><code>Serialize for Value</code></li>
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<li><code>Deserialize for Datetime</code></li>
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<li><code>Serialize for Datetime</code></li>
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<li><code>Deserializer for de::Deserializer</code></li>
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<li><code>Serializer for ser::Serializer</code></li>
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<li><code>Deserializer for Value</code></li>
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</ul>
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<p>This means that you can use Serde to deserialize/serialize the
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<code>Value</code> type as well as the <code>Datetime</code> type in this crate. You can also
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use the <code>Deserializer</code>, <code>Serializer</code>, or <code>Value</code> type itself to act as
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a deserializer/serializer for arbitrary types.</p>
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<p>An example of deserializing with TOML is:</p>
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<pre class="rust rust-example-rendered">
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<span class="attribute">#[<span class="ident">macro_use</span>]</span>
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<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">serde_derive</span>;
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<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">toml</span>;
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<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Deserialize</span>)]</span>
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<span class="kw">struct</span> <span class="ident">Config</span> {
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<span class="ident">ip</span>: <span class="ident">String</span>,
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<span class="ident">port</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">u16</span><span class="op">></span>,
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<span class="ident">keys</span>: <span class="ident">Keys</span>,
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}
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<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Deserialize</span>)]</span>
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<span class="kw">struct</span> <span class="ident">Keys</span> {
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<span class="ident">github</span>: <span class="ident">String</span>,
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<span class="ident">travis</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">String</span><span class="op">></span>,
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}
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<span class="kw">fn</span> <span class="ident">main</span>() {
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<span class="kw">let</span> <span class="ident">config</span>: <span class="ident">Config</span> <span class="op">=</span> <span class="ident">toml</span>::<span class="ident">from_str</span>(<span class="string">r#"
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ip = '127.0.0.1'
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[keys]
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github = 'xxxxxxxxxxxxxxxxx'
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travis = 'yyyyyyyyyyyyyyyyy'
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"#</span>).<span class="ident">unwrap</span>();
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">config</span>.<span class="ident">ip</span>, <span class="string">"127.0.0.1"</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">config</span>.<span class="ident">port</span>, <span class="prelude-val">None</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">config</span>.<span class="ident">keys</span>.<span class="ident">github</span>, <span class="string">"xxxxxxxxxxxxxxxxx"</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">config</span>.<span class="ident">keys</span>.<span class="ident">travis</span>.<span class="ident">as_ref</span>().<span class="ident">unwrap</span>(), <span class="string">"yyyyyyyyyyyyyyyyy"</span>);
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}</pre>
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<p>You can serialize types in a similar fashion:</p>
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<pre class="rust rust-example-rendered">
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<span class="attribute">#[<span class="ident">macro_use</span>]</span>
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<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">serde_derive</span>;
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<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">toml</span>;
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<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Serialize</span>)]</span>
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<span class="kw">struct</span> <span class="ident">Config</span> {
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<span class="ident">ip</span>: <span class="ident">String</span>,
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<span class="ident">port</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">u16</span><span class="op">></span>,
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<span class="ident">keys</span>: <span class="ident">Keys</span>,
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}
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<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Serialize</span>)]</span>
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<span class="kw">struct</span> <span class="ident">Keys</span> {
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<span class="ident">github</span>: <span class="ident">String</span>,
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<span class="ident">travis</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">String</span><span class="op">></span>,
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}
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<span class="kw">fn</span> <span class="ident">main</span>() {
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<span class="kw">let</span> <span class="ident">config</span> <span class="op">=</span> <span class="ident">Config</span> {
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<span class="ident">ip</span>: <span class="string">"127.0.0.1"</span>.<span class="ident">to_string</span>(),
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<span class="ident">port</span>: <span class="prelude-val">None</span>,
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<span class="ident">keys</span>: <span class="ident">Keys</span> {
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<span class="ident">github</span>: <span class="string">"xxxxxxxxxxxxxxxxx"</span>.<span class="ident">to_string</span>(),
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<span class="ident">travis</span>: <span class="prelude-val">Some</span>(<span class="string">"yyyyyyyyyyyyyyyyy"</span>.<span class="ident">to_string</span>()),
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},
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};
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<span class="kw">let</span> <span class="ident">toml</span> <span class="op">=</span> <span class="ident">toml</span>::<span class="ident">to_string</span>(<span class="kw-2">&</span><span class="ident">config</span>).<span class="ident">unwrap</span>();
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}</pre>
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</div><h2 id='reexports' class='section-header'><a href="#reexports">Reexports</a></h2>
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<table><tr><td><code>pub use value::<a class="enum" href="../toml/value/enum.Value.html" title="enum toml::value::Value">Value</a>;</code></td></tr><tr><td><code>pub use ser::<a class="fn" href="../toml/ser/fn.to_string.html" title="fn toml::ser::to_string">to_string</a>;</code></td></tr><tr><td><code>pub use ser::<a class="fn" href="../toml/ser/fn.to_vec.html" title="fn toml::ser::to_vec">to_vec</a>;</code></td></tr><tr><td><code>pub use ser::<a class="struct" href="../toml/ser/struct.Serializer.html" title="struct toml::ser::Serializer">Serializer</a>;</code></td></tr><tr><td><code>pub use de::<a class="fn" href="../toml/de/fn.from_slice.html" title="fn toml::de::from_slice">from_slice</a>;</code></td></tr><tr><td><code>pub use de::<a class="fn" href="../toml/de/fn.from_str.html" title="fn toml::de::from_str">from_str</a>;</code></td></tr><tr><td><code>pub use de::<a class="struct" href="../toml/de/struct.Deserializer.html" title="struct toml::de::Deserializer">Deserializer</a>;</code></td></tr></table><h2 id='modules' class='section-header'><a href="#modules">Modules</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class="mod" href="de/index.html"
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title='mod toml::de'>de</a></td>
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<td class='docblock-short'>
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<p>Deserializing TOML into Rust structures.</p>
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</td>
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</tr>
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<tr class=' module-item'>
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<td><a class="mod" href="ser/index.html"
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title='mod toml::ser'>ser</a></td>
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<td class='docblock-short'>
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<p>Serializing Rust structures into TOML.</p>
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</td>
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</tr>
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<tr class=' module-item'>
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<td><a class="mod" href="value/index.html"
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title='mod toml::value'>value</a></td>
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<td class='docblock-short'>
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<p>Definition of a TOML value</p>
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</td>
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</tr></table></section>
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<section id='search' class="content hidden"></section>
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<section class="footer"></section>
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<aside id="help" class="hidden">
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<div>
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<h1 class="hidden">Help</h1>
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<div class="shortcuts">
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<h2>Keyboard Shortcuts</h2>
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<dl>
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<dt>?</dt>
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<dd>Show this help dialog</dd>
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<dt>S</dt>
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<dd>Focus the search field</dd>
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<dt>⇤</dt>
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<dd>Move up in search results</dd>
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<dt>⇥</dt>
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<dd>Move down in search results</dd>
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<dt>⏎</dt>
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<dd>Go to active search result</dd>
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<dt>+</dt>
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<dd>Collapse/expand all sections</dd>
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</dl>
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</div>
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<div class="infos">
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<h2>Search Tricks</h2>
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<p>
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Prefix searches with a type followed by a colon (e.g.
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<code>fn:</code>) to restrict the search to a given type.
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</p>
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<p>
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Accepted types are: <code>fn</code>, <code>mod</code>,
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<code>struct</code>, <code>enum</code>,
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<code>trait</code>, <code>type</code>, <code>macro</code>,
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and <code>const</code>.
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</p>
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<p>
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Search functions by type signature (e.g.
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<code>vec -> usize</code> or <code>* -> vec</code>)
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</p>
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</div>
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</div>
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</aside>
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<script>
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window.rootPath = "../";
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window.currentCrate = "toml";
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</script>
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<script src="../main.js"></script>
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<script defer src="../search-index.js"></script>
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</body>
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</html>
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