crates/ide/src/syntax_highlighting/test_data/highlighting.html

   1
   2 <style>
   3 body                { margin: 0; }
   4 pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padding: 0.4em; }
   5
   6 .lifetime           { color: #DFAF8F; font-style: italic; }
   7 .label              { color: #DFAF8F; font-style: italic; }
   8 .comment            { color: #7F9F7F; }
   9 .documentation      { color: #629755; }
  10 .intra_doc_link     { font-style: italic; }
  11 .injected           { opacity: 0.65 ; }
  12 .struct, .enum      { color: #7CB8BB; }
  13 .enum_variant       { color: #BDE0F3; }
  14 .string_literal     { color: #CC9393; }
  15 .field              { color: #94BFF3; }
  16 .function           { color: #93E0E3; }
  17 .function.unsafe    { color: #BC8383; }
  18 .operator.unsafe    { color: #BC8383; }
  19 .parameter          { color: #94BFF3; }
  20 .text               { color: #DCDCCC; }
  21 .type               { color: #7CB8BB; }
  22 .builtin_type       { color: #8CD0D3; }
  23 .type_param         { color: #DFAF8F; }
  24 .attribute          { color: #94BFF3; }
  25 .numeric_literal    { color: #BFEBBF; }
  26 .bool_literal       { color: #BFE6EB; }
  27 .macro              { color: #94BFF3; }
  28 .module             { color: #AFD8AF; }
  29 .value_param        { color: #DCDCCC; }
  30 .variable           { color: #DCDCCC; }
  31 .format_specifier   { color: #CC696B; }
  32 .mutable            { text-decoration: underline; }
  33 .escape_sequence    { color: #94BFF3; }
  34 .keyword            { color: #F0DFAF; font-weight: bold; }
  35 .keyword.unsafe     { color: #BC8383; font-weight: bold; }
  36 .control            { font-style: italic; }
  37
  38 .unresolved_reference { color: #FC5555; text-decoration: wavy underline; }
  39 </style>
  40 <pre><code><span class="keyword">use</span> <span class="module">inner</span><span class="operator">::</span><span class="brace">{</span><span class="self_keyword">self</span> <span class="keyword">as</span> <span class="module declaration">inner_mod</span><span class="brace">}</span><span class="semicolon">;</span>
  41 <span class="keyword">mod</span> <span class="module declaration">inner</span> <span class="brace">{</span><span class="brace">}</span>
  42
  43 <span class="attribute attribute">#</span><span class="attribute attribute">[</span><span class="function attribute">rustc_builtin_macro</span><span class="attribute attribute">]</span>
  44 <span class="keyword">macro</span> <span class="macro declaration">Copy</span> <span class="brace">{</span><span class="brace">}</span>
  45
  46 <span class="comment">// Needed for function consuming vs normal</span>
  47 <span class="keyword">pub</span> <span class="keyword">mod</span> <span class="module declaration">marker</span> <span class="brace">{</span>
  48     <span class="attribute attribute">#</span><span class="attribute attribute">[</span><span class="function attribute">lang</span><span class="attribute attribute"> </span><span class="operator attribute">=</span><span class="attribute attribute"> </span><span class="string_literal attribute">"copy"</span><span class="attribute attribute">]</span>
  49     <span class="keyword">pub</span> <span class="keyword">trait</span> <span class="trait declaration">Copy</span> <span class="brace">{</span><span class="brace">}</span>
  50 <span class="brace">}</span>
  51
  52 <span class="keyword">pub</span> <span class="keyword">mod</span> <span class="module declaration">ops</span> <span class="brace">{</span>
  53     <span class="attribute attribute">#</span><span class="attribute attribute">[</span><span class="function attribute">lang</span><span class="attribute attribute"> </span><span class="operator attribute">=</span><span class="attribute attribute"> </span><span class="string_literal attribute">"fn_once"</span><span class="attribute attribute">]</span>
  54     <span class="keyword">pub</span> <span class="keyword">trait</span> <span class="trait declaration">FnOnce</span><span class="angle">&lt;</span><span class="type_param declaration">Args</span><span class="angle">&gt;</span> <span class="brace">{</span><span class="brace">}</span>
  55
  56     <span class="attribute attribute">#</span><span class="attribute attribute">[</span><span class="function attribute">lang</span><span class="attribute attribute"> </span><span class="operator attribute">=</span><span class="attribute attribute"> </span><span class="string_literal attribute">"fn_mut"</span><span class="attribute attribute">]</span>
  57     <span class="keyword">pub</span> <span class="keyword">trait</span> <span class="trait declaration">FnMut</span><span class="angle">&lt;</span><span class="type_param declaration">Args</span><span class="angle">&gt;</span><span class="colon">:</span> <span class="trait">FnOnce</span><span class="angle">&lt;</span><span class="type_param">Args</span><span class="angle">&gt;</span> <span class="brace">{</span><span class="brace">}</span>
  58
  59     <span class="attribute attribute">#</span><span class="attribute attribute">[</span><span class="function attribute">lang</span><span class="attribute attribute"> </span><span class="operator attribute">=</span><span class="attribute attribute"> </span><span class="string_literal attribute">"fn"</span><span class="attribute attribute">]</span>
  60     <span class="keyword">pub</span> <span class="keyword">trait</span> <span class="trait declaration">Fn</span><span class="angle">&lt;</span><span class="type_param declaration">Args</span><span class="angle">&gt;</span><span class="colon">:</span> <span class="trait">FnMut</span><span class="angle">&lt;</span><span class="type_param">Args</span><span class="angle">&gt;</span> <span class="brace">{</span><span class="brace">}</span>
  61 <span class="brace">}</span>
  62
  63
  64 <span class="keyword">struct</span> <span class="struct declaration">Foo</span> <span class="brace">{</span>
  65     <span class="keyword">pub</span> <span class="field declaration">x</span><span class="colon">:</span> <span class="builtin_type">i32</span><span class="comma">,</span>
  66     <span class="keyword">pub</span> <span class="field declaration">y</span><span class="colon">:</span> <span class="builtin_type">i32</span><span class="comma">,</span>
  67 <span class="brace">}</span>
  68
  69 <span class="keyword">trait</span> <span class="trait declaration">Bar</span> <span class="keyword">where</span> <span class="type_param">Self</span><span class="colon">:</span> <span class="brace">{</span>
  70     <span class="keyword">fn</span> <span class="function associated declaration trait">bar</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">i32</span><span class="semicolon">;</span>
  71 <span class="brace">}</span>
  72
  73 <span class="keyword">impl</span> <span class="trait">Bar</span> <span class="keyword">for</span> <span class="struct">Foo</span> <span class="keyword">where</span> <span class="self_type">Self</span><span class="colon">:</span> <span class="brace">{</span>
  74     <span class="keyword">fn</span> <span class="function associated declaration trait">bar</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">i32</span> <span class="brace">{</span>
  75         <span class="self_keyword">self</span><span class="operator">.</span><span class="field">x</span>
  76     <span class="brace">}</span>
  77 <span class="brace">}</span>
  78
  79 <span class="keyword">impl</span> <span class="struct">Foo</span> <span class="brace">{</span>
  80     <span class="keyword">fn</span> <span class="function associated declaration">baz</span><span class="parenthesis">(</span><span class="keyword">mut</span> <span class="self_keyword declaration mutable">self</span><span class="comma">,</span> <span class="value_param declaration">f</span><span class="colon">:</span> <span class="struct">Foo</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">i32</span> <span class="brace">{</span>
  81         <span class="value_param">f</span><span class="operator">.</span><span class="function associated consuming">baz</span><span class="parenthesis">(</span><span class="self_keyword consuming mutable">self</span><span class="parenthesis">)</span>
  82     <span class="brace">}</span>
  83
  84     <span class="keyword">fn</span> <span class="function associated declaration mutable">qux</span><span class="parenthesis">(</span><span class="operator">&</span><span class="keyword">mut</span> <span class="self_keyword declaration mutable">self</span><span class="parenthesis">)</span> <span class="brace">{</span>
  85         <span class="self_keyword mutable">self</span><span class="operator">.</span><span class="field">x</span> <span class="operator">=</span> <span class="numeric_literal">0</span><span class="semicolon">;</span>
  86     <span class="brace">}</span>
  87
  88     <span class="keyword">fn</span> <span class="function associated declaration">quop</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">i32</span> <span class="brace">{</span>
  89         <span class="self_keyword">self</span><span class="operator">.</span><span class="field">x</span>
  90     <span class="brace">}</span>
  91 <span class="brace">}</span>
  92
  93 <span class="attribute attribute">#</span><span class="attribute attribute">[</span><span class="function attribute">derive</span><span class="parenthesis attribute">(</span><span class="attribute attribute">Copy</span><span class="parenthesis attribute">)</span><span class="attribute attribute">]</span>
  94 <span class="keyword">struct</span> <span class="struct declaration">FooCopy</span> <span class="brace">{</span>
  95     <span class="field declaration">x</span><span class="colon">:</span> <span class="builtin_type">u32</span><span class="comma">,</span>
  96 <span class="brace">}</span>
  97
  98 <span class="keyword">impl</span> <span class="struct">FooCopy</span> <span class="brace">{</span>
  99     <span class="keyword">fn</span> <span class="function associated declaration">baz</span><span class="parenthesis">(</span><span class="self_keyword declaration">self</span><span class="comma">,</span> <span class="value_param declaration">f</span><span class="colon">:</span> <span class="struct">FooCopy</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">u32</span> <span class="brace">{</span>
 100         <span class="value_param">f</span><span class="operator">.</span><span class="function associated">baz</span><span class="parenthesis">(</span><span class="self_keyword">self</span><span class="parenthesis">)</span>
 101     <span class="brace">}</span>
 102
 103     <span class="keyword">fn</span> <span class="function associated declaration mutable">qux</span><span class="parenthesis">(</span><span class="operator">&</span><span class="keyword">mut</span> <span class="self_keyword declaration mutable">self</span><span class="parenthesis">)</span> <span class="brace">{</span>
 104         <span class="self_keyword mutable">self</span><span class="operator">.</span><span class="field">x</span> <span class="operator">=</span> <span class="numeric_literal">0</span><span class="semicolon">;</span>
 105     <span class="brace">}</span>
 106
 107     <span class="keyword">fn</span> <span class="function associated declaration">quop</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">u32</span> <span class="brace">{</span>
 108         <span class="self_keyword">self</span><span class="operator">.</span><span class="field">x</span>
 109     <span class="brace">}</span>
 110 <span class="brace">}</span>
 111
 112 <span class="keyword">fn</span> <span class="function declaration">str</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="brace">{</span>
 113     <span class="function">str</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="semicolon">;</span>
 114 <span class="brace">}</span>
 115
 116 <span class="keyword">static</span> <span class="keyword">mut</span> <span class="static declaration mutable unsafe">STATIC_MUT</span><span class="colon">:</span> <span class="builtin_type">i32</span> <span class="operator">=</span> <span class="numeric_literal">0</span><span class="semicolon">;</span>
 117
 118 <span class="keyword">fn</span> <span class="function declaration">foo</span><span class="angle">&lt;</span><span class="lifetime declaration">'a</span><span class="comma">,</span> <span class="type_param declaration">T</span><span class="angle">&gt;</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="type_param">T</span> <span class="brace">{</span>
 119     <span class="function">foo</span><span class="operator">::</span><span class="angle">&lt;</span><span class="lifetime">'a</span><span class="comma">,</span> <span class="builtin_type">i32</span><span class="angle">&gt;</span><span class="parenthesis">(</span><span class="parenthesis">)</span>
 120 <span class="brace">}</span>
 121
 122 <span class="keyword">fn</span> <span class="function declaration">never</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">!</span> <span class="brace">{</span>
 123     <span class="keyword control">loop</span> <span class="brace">{</span><span class="brace">}</span>
 124 <span class="brace">}</span>
 125
 126 <span class="keyword">fn</span> <span class="function declaration">const_param</span><span class="angle">&lt;</span><span class="keyword">const</span> <span class="const_param declaration">FOO</span><span class="colon">:</span> <span class="builtin_type">usize</span><span class="angle">&gt;</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="builtin_type">usize</span> <span class="brace">{</span>
 127     <span class="const_param">FOO</span>
 128 <span class="brace">}</span>
 129
 130 <span class="keyword">use</span> <span class="module">ops</span><span class="operator">::</span><span class="trait">Fn</span><span class="semicolon">;</span>
 131 <span class="keyword">fn</span> <span class="function declaration">baz</span><span class="angle">&lt;</span><span class="type_param declaration">F</span><span class="colon">:</span> <span class="trait">Fn</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="parenthesis">(</span><span class="parenthesis">)</span><span class="angle">&gt;</span><span class="parenthesis">(</span><span class="value_param callable declaration">f</span><span class="colon">:</span> <span class="type_param">F</span><span class="parenthesis">)</span> <span class="brace">{</span>
 132     <span class="value_param callable">f</span><span class="parenthesis">(</span><span class="parenthesis">)</span>
 133 <span class="brace">}</span>
 134
 135 <span class="keyword">fn</span> <span class="function declaration">foobar</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="keyword">impl</span> <span class="macro">Copy</span> <span class="brace">{</span><span class="brace">}</span>
 136
 137 <span class="keyword">fn</span> <span class="function declaration">foo</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="brace">{</span>
 138     <span class="keyword">let</span> <span class="variable declaration">bar</span> <span class="operator">=</span> <span class="function">foobar</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="semicolon">;</span>
 139 <span class="brace">}</span>
 140
 141 <span class="keyword">macro_rules</span><span class="punctuation">!</span> <span class="macro declaration">def_fn</span> <span class="brace">{</span>
 142     <span class="parenthesis">(</span><span class="punctuation">$</span><span class="parenthesis">(</span><span class="punctuation">$</span>tt<span class="colon">:</span>tt<span class="parenthesis">)</span><span class="punctuation">*</span><span class="parenthesis">)</span> <span class="operator">=</span><span class="angle">&gt;</span> <span class="brace">{</span><span class="punctuation">$</span><span class="parenthesis">(</span><span class="punctuation">$</span>tt<span class="parenthesis">)</span><span class="punctuation">*</span><span class="brace">}</span>
 143 <span class="brace">}</span>
 144
 145 <span class="macro">def_fn!</span> <span class="brace">{</span>
 146     <span class="keyword">fn</span> <span class="function declaration">bar</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="operator">-</span><span class="operator">&gt;</span> <span class="builtin_type">u32</span> <span class="brace">{</span>
 147         <span class="numeric_literal">100</span>
 148     <span class="brace">}</span>
 149 <span class="brace">}</span>
 150
 151 <span class="keyword">macro_rules</span><span class="punctuation">!</span> <span class="macro declaration">noop</span> <span class="brace">{</span>
 152     <span class="parenthesis">(</span><span class="punctuation">$</span>expr<span class="colon">:</span>expr<span class="parenthesis">)</span> <span class="operator">=</span><span class="angle">&gt;</span> <span class="brace">{</span>
 153         <span class="punctuation">$</span>expr
 154     <span class="brace">}</span>
 155 <span class="brace">}</span>
 156
 157 <span class="keyword">macro_rules</span><span class="punctuation">!</span> <span class="macro declaration">keyword_frag</span> <span class="brace">{</span>
 158     <span class="parenthesis">(</span><span class="punctuation">$</span>type<span class="colon">:</span>ty<span class="parenthesis">)</span> <span class="operator">=</span><span class="angle">&gt;</span> <span class="parenthesis">(</span><span class="punctuation">$</span>type<span class="parenthesis">)</span>
 159 <span class="brace">}</span>
 160
 161 <span class="keyword">macro</span> <span class="macro declaration">with_args</span><span class="parenthesis">(</span><span class="punctuation">$</span>i<span class="colon">:</span>ident<span class="parenthesis">)</span> <span class="brace">{</span>
 162     <span class="punctuation">$</span>i
 163 <span class="brace">}</span>
 164
 165 <span class="keyword">macro</span> <span class="macro declaration">without_args</span> <span class="brace">{</span>
 166     <span class="parenthesis">(</span><span class="punctuation">$</span>i<span class="colon">:</span>ident<span class="parenthesis">)</span> <span class="operator">=</span><span class="angle">&gt;</span> <span class="brace">{</span>
 167         <span class="punctuation">$</span>i
 168     <span class="brace">}</span>
 169 <span class="brace">}</span>
 170
 171 <span class="comment">// comment</span>
 172 <span class="keyword">fn</span> <span class="function declaration">main</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="brace">{</span>
 173     <span class="macro">println!</span><span class="parenthesis">(</span><span class="string_literal">"Hello, {}!"</span><span class="comma">,</span> <span class="numeric_literal">92</span><span class="parenthesis">)</span><span class="semicolon">;</span>
 174
 175     <span class="keyword">let</span> <span class="keyword">mut</span> <span class="variable declaration mutable">vec</span> <span class="operator">=</span> <span class="unresolved_reference">Vec</span><span class="operator">::</span><span class="unresolved_reference">new</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="semicolon">;</span>
 176     <span class="keyword control">if</span> <span class="bool_literal">true</span> <span class="brace">{</span>
 177         <span class="keyword">let</span> <span class="variable declaration">x</span> <span class="operator">=</span> <span class="numeric_literal">92</span><span class="semicolon">;</span>
 178         <span class="variable mutable">vec</span><span class="operator">.</span><span class="unresolved_reference">push</span><span class="parenthesis">(</span><span class="struct">Foo</span> <span class="brace">{</span> <span class="field">x</span><span class="comma">,</span> <span class="field">y</span><span class="colon">:</span> <span class="numeric_literal">1</span> <span class="brace">}</span><span class="parenthesis">)</span><span class="semicolon">;</span>
 179     <span class="brace">}</span>
 180     <span class="keyword unsafe">unsafe</span> <span class="brace">{</span>
 181         <span class="variable mutable">vec</span><span class="operator">.</span><span class="unresolved_reference">set_len</span><span class="parenthesis">(</span><span class="numeric_literal">0</span><span class="parenthesis">)</span><span class="semicolon">;</span>
 182         <span class="static mutable unsafe">STATIC_MUT</span> <span class="operator">=</span> <span class="numeric_literal">1</span><span class="semicolon">;</span>
 183     <span class="brace">}</span>
 184
 185     <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="brace">{</span>
 186         <span class="comment">// Do nothing</span>
 187     <span class="brace">}</span>
 188
 189     <span class="macro">noop!</span><span class="parenthesis">(</span><span class="macro">noop</span><span class="macro">!</span><span class="parenthesis">(</span><span class="numeric_literal">1</span><span class="parenthesis">)</span><span class="parenthesis">)</span><span class="semicolon">;</span>
 190
 191     <span class="keyword">let</span> <span class="keyword">mut</span> <span class="variable declaration mutable">x</span> <span class="operator">=</span> <span class="numeric_literal">42</span><span class="semicolon">;</span>
 192     <span class="keyword">let</span> <span class="variable declaration mutable">y</span> <span class="operator">=</span> <span class="operator">&</span><span class="keyword">mut</span> <span class="variable mutable">x</span><span class="semicolon">;</span>
 193     <span class="keyword">let</span> <span class="variable declaration">z</span> <span class="operator">=</span> <span class="operator">&</span><span class="variable mutable">y</span><span class="semicolon">;</span>
 194
 195     <span class="keyword">let</span> <span class="struct">Foo</span> <span class="brace">{</span> <span class="field">x</span><span class="colon">:</span> <span class="variable declaration">z</span><span class="comma">,</span> <span class="field">y</span> <span class="brace">}</span> <span class="operator">=</span> <span class="struct">Foo</span> <span class="brace">{</span> <span class="field">x</span><span class="colon">:</span> <span class="variable">z</span><span class="comma">,</span> <span class="field">y</span> <span class="brace">}</span><span class="semicolon">;</span>
 196
 197     <span class="variable">y</span><span class="semicolon">;</span>
 198
 199     <span class="keyword">let</span> <span class="keyword">mut</span> <span class="variable declaration mutable">foo</span> <span class="operator">=</span> <span class="struct">Foo</span> <span class="brace">{</span> <span class="field">x</span><span class="comma">,</span> <span class="field">y</span><span class="colon">:</span> <span class="variable mutable">x</span> <span class="brace">}</span><span class="semicolon">;</span>
 200     <span class="keyword">let</span> <span class="variable declaration">foo2</span> <span class="operator">=</span> <span class="struct">Foo</span> <span class="brace">{</span> <span class="field">x</span><span class="comma">,</span> <span class="field">y</span><span class="colon">:</span> <span class="variable mutable">x</span> <span class="brace">}</span><span class="semicolon">;</span>
 201     <span class="variable mutable">foo</span><span class="operator">.</span><span class="function associated">quop</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="semicolon">;</span>
 202     <span class="variable mutable">foo</span><span class="operator">.</span><span class="function associated mutable">qux</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="semicolon">;</span>
 203     <span class="variable mutable">foo</span><span class="operator">.</span><span class="function associated consuming">baz</span><span class="parenthesis">(</span><span class="variable consuming">foo2</span><span class="parenthesis">)</span><span class="semicolon">;</span>
 204
 205     <span class="keyword">let</span> <span class="keyword">mut</span> <span class="variable declaration mutable">copy</span> <span class="operator">=</span> <span class="struct">FooCopy</span> <span class="brace">{</span> <span class="field">x</span> <span class="brace">}</span><span class="semicolon">;</span>
 206     <span class="variable mutable">copy</span><span class="operator">.</span><span class="function associated">quop</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="semicolon">;</span>
 207     <span class="variable mutable">copy</span><span class="operator">.</span><span class="function associated mutable">qux</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="semicolon">;</span>
 208     <span class="variable mutable">copy</span><span class="operator">.</span><span class="function associated">baz</span><span class="parenthesis">(</span><span class="variable mutable">copy</span><span class="parenthesis">)</span><span class="semicolon">;</span>
 209
 210     <span class="keyword">let</span> <span class="variable callable declaration">a</span> <span class="operator">=</span> <span class="punctuation">|</span><span class="value_param declaration">x</span><span class="punctuation">|</span> <span class="value_param">x</span><span class="semicolon">;</span>
 211     <span class="keyword">let</span> <span class="variable callable declaration">bar</span> <span class="operator">=</span> <span class="struct">Foo</span><span class="operator">::</span><span class="function associated">baz</span><span class="semicolon">;</span>
 212
 213     <span class="keyword">let</span> <span class="variable declaration">baz</span> <span class="operator">=</span> <span class="numeric_literal">-</span><span class="numeric_literal">42</span><span class="semicolon">;</span>
 214     <span class="keyword">let</span> <span class="variable declaration">baz</span> <span class="operator">=</span> <span class="operator">-</span><span class="variable">baz</span><span class="semicolon">;</span>
 215
 216     <span class="keyword">let</span> <span class="punctuation">_</span> <span class="operator">=</span> <span class="logical">!</span><span class="bool_literal">true</span><span class="semicolon">;</span>
 217
 218     <span class="label declaration">'foo</span><span class="colon">:</span> <span class="keyword control">loop</span> <span class="brace">{</span>
 219         <span class="keyword control">break</span> <span class="label">'foo</span><span class="semicolon">;</span>
 220         <span class="keyword control">continue</span> <span class="label">'foo</span><span class="semicolon">;</span>
 221     <span class="brace">}</span>
 222 <span class="brace">}</span>
 223
 224 <span class="keyword">enum</span> <span class="enum declaration">Option</span><span class="angle">&lt;</span><span class="type_param declaration">T</span><span class="angle">&gt;</span> <span class="brace">{</span>
 225     <span class="enum_variant declaration">Some</span><span class="parenthesis">(</span><span class="type_param">T</span><span class="parenthesis">)</span><span class="comma">,</span>
 226     <span class="enum_variant declaration">None</span><span class="comma">,</span>
 227 <span class="brace">}</span>
 228 <span class="keyword">use</span> <span class="enum">Option</span><span class="operator">::</span><span class="punctuation">*</span><span class="semicolon">;</span>
 229
 230 <span class="keyword">impl</span><span class="angle">&lt;</span><span class="type_param declaration">T</span><span class="angle">&gt;</span> <span class="enum">Option</span><span class="angle">&lt;</span><span class="type_param">T</span><span class="angle">&gt;</span> <span class="brace">{</span>
 231     <span class="keyword">fn</span> <span class="function associated declaration">and</span><span class="angle">&lt;</span><span class="type_param declaration">U</span><span class="angle">&gt;</span><span class="parenthesis">(</span><span class="self_keyword declaration">self</span><span class="comma">,</span> <span class="value_param declaration">other</span><span class="colon">:</span> <span class="enum">Option</span><span class="angle">&lt;</span><span class="type_param">U</span><span class="angle">&gt;</span><span class="parenthesis">)</span> <span class="operator">-&gt;</span> <span class="enum">Option</span><span class="angle">&lt;</span><span class="parenthesis">(</span><span class="type_param">T</span><span class="comma">,</span> <span class="type_param">U</span><span class="parenthesis">)</span><span class="angle">&gt;</span> <span class="brace">{</span>
 232         <span class="keyword control">match</span> <span class="value_param">other</span> <span class="brace">{</span>
 233             <span class="enum_variant">None</span> <span class="operator">=&gt;</span> <span class="macro">unimplemented!</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="comma">,</span>
 234             <span class="variable declaration">Nope</span> <span class="operator">=&gt;</span> <span class="variable">Nope</span><span class="comma">,</span>
 235         <span class="brace">}</span>
 236     <span class="brace">}</span>
 237 <span class="brace">}</span>
 238
 239 <span class="keyword async">async</span> <span class="keyword">fn</span> <span class="function declaration async">learn_and_sing</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="brace">{</span>
 240     <span class="keyword">let</span> <span class="variable declaration">song</span> <span class="operator">=</span> <span class="unresolved_reference">learn_song</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="operator">.</span><span class="keyword control async">await</span><span class="semicolon">;</span>
 241     <span class="unresolved_reference">sing_song</span><span class="parenthesis">(</span><span class="variable consuming">song</span><span class="parenthesis">)</span><span class="operator">.</span><span class="keyword control async">await</span><span class="semicolon">;</span>
 242 <span class="brace">}</span>
 243
 244 <span class="keyword async">async</span> <span class="keyword">fn</span> <span class="function declaration async">async_main</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="brace">{</span>
 245     <span class="keyword">let</span> <span class="variable declaration">f1</span> <span class="operator">=</span> <span class="function async">learn_and_sing</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="semicolon">;</span>
 246     <span class="keyword">let</span> <span class="variable declaration">f2</span> <span class="operator">=</span> <span class="unresolved_reference">dance</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="semicolon">;</span>
 247     futures::<span class="macro">join!</span><span class="parenthesis">(</span>f1<span class="comma">,</span> f2<span class="parenthesis">)</span><span class="semicolon">;</span>
 248 <span class="brace">}</span>
 249
 250 <span class="keyword unsafe">unsafe</span> <span class="keyword">trait</span> <span class="trait declaration unsafe">Dangerous</span> <span class="brace">{</span><span class="brace">}</span>
 251 <span class="keyword">impl</span> <span class="trait unsafe">Dangerous</span> <span class="keyword">for</span> <span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="brace">{</span><span class="brace">}</span></code></pre>