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<style>
body { margin: 0; }
pre { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padding: 0.4em; }
.lifetime { color: #DFAF8F; font-style: italic; }
.comment { color: #7F9F7F; }
.struct, .enum { color: #7CB8BB; }
.enum_variant { color: #BDE0F3; }
.string_literal { color: #CC9393; }
.field { color: #94BFF3; }
.function { color: #93E0E3; }
.parameter { color: #94BFF3; }
.text { color: #DCDCCC; }
.type { color: #7CB8BB; }
.builtin_type { color: #8CD0D3; }
.type_param { color: #DFAF8F; }
.attribute { color: #94BFF3; }
.numeric_literal { color: #BFEBBF; }
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.keyword { color: #F0DFAF; font-weight: bold; }
.keyword.unsafe { color: #BC8383; font-weight: bold; }
.control { font-style: italic; }
</style>
<pre><code><span class="attribute">#[derive(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">fn</span> <span class="function declaration">foo</span><<span class="lifetime declaration">'a</span>, <span class="type_param declaration">T</span>>() -> <span class="type_param">T</span> {
<span class="function">foo</span>::<<span class="lifetime">'a</span>, <span class="builtin_type">i32</span>>()
}
<span class="macro">macro_rules!</span> def_fn {
($($tt:tt)*) => {$($tt)*}
}
<span class="macro">def_fn!</span> {
<span class="keyword">fn</span> <span class="function declaration">bar</span>() -> <span class="builtin_type">u32</span> {
<span class="numeric_literal">100</span>
}
}
<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="keyword">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="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="variable mutable">y</span>;
}
<span class="keyword">enum</span> <span class="enum declaration">Option</span><<span class="type_param declaration">T</span>> {
<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><<span class="type_param declaration">T</span>> <span class="enum">Option</span><<span class="type_param">T</span>> {
<span class="keyword">fn</span> <span class="function declaration">and</span><<span class="type_param declaration">U</span>>(<span class="keyword">self</span>, <span class="variable declaration">other</span>: <span class="enum">Option</span><<span class="type_param">U</span>>) -> <span class="enum">Option</span><(<span class="type_param">T</span>, <span class="type_param">U</span>)> {
<span class="keyword control">match</span> <span class="variable">other</span> {
<span class="enum_variant">None</span> => <span class="macro">unimplemented!</span>(),
<span class="variable declaration">Nope</span> => <span class="variable">Nope</span>,
}
}
}</code></pre>
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