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<a href="." >Structs and enums in JSON</a>
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<h1 id="structs-and-enums-in-json"><a name="structs-and-enums-in-json" class="plugin-anchor" href="#structs-and-enums-in-json"><i class="fa fa-link" aria-hidden="true"></i></a>Structs and enums in JSON</h1>
<p>A Serde <code>Serializer</code> is responsible for selecting the convention by which Rust
structs and enums are represented in that format. Here are the conventions
selected by the <a href="https://github.com/serde-rs/json" target="_blank"><code>serde_json</code></a> data format.
For consistency, other human-readable formats are encouraged to develop
analogous conventions where possible.</p>
<pre><code class="lang-rust"><span class="hljs-class"><span class="hljs-keyword">struct</span> <span class="hljs-title">W</span></span> {
a: <span class="hljs-keyword">i32</span>,
b: <span class="hljs-keyword">i32</span>,
}
<span class="hljs-keyword">let</span> w = W { a: <span class="hljs-number">0</span>, b: <span class="hljs-number">0</span> }; <span class="hljs-comment">// Represented as `{"a":0,"b":0}`</span>
<span class="hljs-class"><span class="hljs-keyword">struct</span> <span class="hljs-title">X</span></span>(<span class="hljs-keyword">i32</span>, <span class="hljs-keyword">i32</span>);
<span class="hljs-keyword">let</span> x = X(<span class="hljs-number">0</span>, <span class="hljs-number">0</span>); <span class="hljs-comment">// Represented as `[0,0]`</span>
<span class="hljs-class"><span class="hljs-keyword">struct</span> <span class="hljs-title">Y</span></span>(<span class="hljs-keyword">i32</span>);
<span class="hljs-keyword">let</span> y = Y(<span class="hljs-number">0</span>); <span class="hljs-comment">// Represented as just the inner value `0`</span>
<span class="hljs-class"><span class="hljs-keyword">struct</span> <span class="hljs-title">Z</span></span>;
<span class="hljs-keyword">let</span> z = Z; <span class="hljs-comment">// Represented as `null`</span>
<span class="hljs-class"><span class="hljs-keyword">enum</span> <span class="hljs-title">E</span></span> {
W { a: <span class="hljs-keyword">i32</span>, b: <span class="hljs-keyword">i32</span> },
X(<span class="hljs-keyword">i32</span>, <span class="hljs-keyword">i32</span>),
Y(<span class="hljs-keyword">i32</span>),
Z,
}
<span class="hljs-keyword">let</span> w = E::W { a: <span class="hljs-number">0</span>, b: <span class="hljs-number">0</span> }; <span class="hljs-comment">// Represented as `{"W":{"a":0,"b":0}}`</span>
<span class="hljs-keyword">let</span> x = E::X(<span class="hljs-number">0</span>, <span class="hljs-number">0</span>); <span class="hljs-comment">// Represented as `{"X":[0,0]}`</span>
<span class="hljs-keyword">let</span> y = E::Y(<span class="hljs-number">0</span>); <span class="hljs-comment">// Represented as `{"Y":0}`</span>
<span class="hljs-keyword">let</span> z = E::Z; <span class="hljs-comment">// Represented as `"Z"`</span>
</code></pre>
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