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<style>
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</style>
<pre><code><span class="attribute">#[</span><span class="function attribute">derive</span><span class="attribute">(Clone, Debug)]</span>
<span class="keyword">struct</span> <span class="struct declaration">Foo</span> {
    <span class="keyword">pub</span> <span class="field declaration">x</span>: <span class="builtin_type">i32</span>,
    <span class="keyword">pub</span> <span class="field declaration">y</span>: <span class="builtin_type">i32</span>,
}

<span class="keyword">trait</span> <span class="trait declaration">Bar</span> {
    <span class="keyword">fn</span> <span class="function declaration">bar</span>(&<span class="self_keyword">self</span>) -&gt; <span class="builtin_type">i32</span>;
}

<span class="keyword">impl</span> <span class="trait">Bar</span> <span class="keyword">for</span> <span class="struct">Foo</span> {
    <span class="keyword">fn</span> <span class="function declaration">bar</span>(&<span class="self_keyword">self</span>) -&gt; <span class="builtin_type">i32</span> {
        <span class="self_keyword">self</span>.<span class="field">x</span>
    }
}

<span class="keyword">impl</span> <span class="struct">Foo</span> {
    <span class="keyword">fn</span> <span class="function declaration">baz</span>(<span class="keyword">mut</span> <span class="self_keyword mutable">self</span>) -&gt; <span class="builtin_type">i32</span> {
        <span class="self_keyword">self</span>.<span class="field">x</span>
    }

    <span class="keyword">fn</span> <span class="function declaration">qux</span>(&<span class="keyword">mut</span> <span class="self_keyword mutable">self</span>) {
        <span class="self_keyword mutable">self</span>.<span class="field">x</span> = <span class="numeric_literal">0</span>;
    }
}

<span class="keyword">static</span> <span class="keyword">mut</span> <span class="static declaration mutable">STATIC_MUT</span>: <span class="builtin_type">i32</span> = <span class="numeric_literal">0</span>;

<span class="keyword">fn</span> <span class="function declaration">foo</span>&lt;<span class="lifetime declaration">'a</span>, <span class="type_param declaration">T</span>&gt;() -&gt; <span class="type_param">T</span> {
    <span class="function">foo</span>::&lt;<span class="lifetime">'a</span>, <span class="builtin_type">i32</span>&gt;()
}

<span class="macro">macro_rules!</span> <span class="macro declaration">def_fn</span> {
    ($($tt:tt)*) =&gt; {$($tt)*}
}

<span class="macro">def_fn!</span> {
    <span class="keyword">fn</span> <span class="function declaration">bar</span>() -&gt; <span class="builtin_type">u32</span> {
        <span class="numeric_literal">100</span>
    }
}

<span class="macro">macro_rules!</span> <span class="macro declaration">noop</span> {
    ($expr:expr) =&gt; {
        $expr
    }
}

<span class="comment">// comment</span>
<span class="keyword">fn</span> <span class="function declaration">main</span>() {
    <span class="macro">println!</span>(<span class="string_literal">"Hello, {}!"</span>, <span class="numeric_literal">92</span>);

    <span class="keyword">let</span> <span class="keyword">mut</span> <span class="variable declaration mutable">vec</span> = <span class="unresolved_reference">Vec</span>::<span class="unresolved_reference">new</span>();
    <span class="keyword control">if</span> <span class="bool_literal">true</span> {
        <span class="keyword">let</span> <span class="variable declaration">x</span> = <span class="numeric_literal">92</span>;
        <span class="variable mutable">vec</span>.<span class="unresolved_reference">push</span>(<span class="struct">Foo</span> { <span class="field">x</span>, <span class="field">y</span>: <span class="numeric_literal">1</span> });
    }
    <span class="keyword unsafe">unsafe</span> {
        <span class="variable mutable">vec</span>.<span class="unresolved_reference">set_len</span>(<span class="numeric_literal">0</span>);
        <span class="static mutable">STATIC_MUT</span> = <span class="numeric_literal">1</span>;
    }

    <span class="keyword control">for</span> <span class="variable declaration">e</span> <span class="keyword control">in</span> <span class="variable mutable">vec</span> {
        <span class="comment">// Do nothing</span>
    }

    <span class="macro">noop!</span>(<span class="macro">noop</span><span class="macro">!</span>(<span class="numeric_literal">1</span>));

    <span class="keyword">let</span> <span class="keyword">mut</span> <span class="variable declaration mutable">x</span> = <span class="numeric_literal">42</span>;
    <span class="keyword">let</span> <span class="variable declaration mutable">y</span> = &<span class="keyword">mut</span> <span class="variable mutable">x</span>;
    <span class="keyword">let</span> <span class="variable declaration">z</span> = &<span class="variable mutable">y</span>;

    <span class="keyword">let</span> <span class="struct">Foo</span> { <span class="field">x</span>: <span class="variable declaration">z</span>, <span class="field">y</span> } = <span class="struct">Foo</span> { <span class="field">x</span>: <span class="variable">z</span>, <span class="field">y</span> };

    <span class="variable">y</span>;
}

<span class="keyword">enum</span> <span class="enum declaration">Option</span>&lt;<span class="type_param declaration">T</span>&gt; {
    <span class="enum_variant declaration">Some</span>(<span class="type_param">T</span>),
    <span class="enum_variant declaration">None</span>,
}
<span class="keyword">use</span> <span class="enum">Option</span>::*;

<span class="keyword">impl</span>&lt;<span class="type_param declaration">T</span>&gt; <span class="enum">Option</span>&lt;<span class="type_param">T</span>&gt; {
    <span class="keyword">fn</span> <span class="function declaration">and</span>&lt;<span class="type_param declaration">U</span>&gt;(<span class="self_keyword">self</span>, <span class="value_param declaration">other</span>: <span class="enum">Option</span>&lt;<span class="type_param">U</span>&gt;) -&gt; <span class="enum">Option</span>&lt;(<span class="type_param">T</span>, <span class="type_param">U</span>)&gt; {
        <span class="keyword control">match</span> <span class="value_param">other</span> {
            <span class="enum_variant">None</span> =&gt; <span class="macro">unimplemented!</span>(),
            <span class="variable declaration">Nope</span> =&gt; <span class="variable">Nope</span>,
        }
    }
}</code></pre>