<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source to the Rust file `src/server/handler.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>handler.rs.html -- source</title><link rel="stylesheet" type="text/css" href="../../../normalize.css"><link rel="stylesheet" type="text/css" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../../dark.css"><link rel="stylesheet" type="text/css" href="../../../light.css" id="themeStyle"><script src="../../../storage.js"></script></head><body class="rustdoc source"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><a id="settings-menu" href="../../../settings.html"><img src="../../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><pre class="line-numbers"><span id="1"> 1</span> <span id="2"> 2</span> <span id="3"> 3</span> <span id="4"> 4</span> <span id="5"> 5</span> <span id="6"> 6</span> <span id="7"> 7</span> <span id="8"> 8</span> <span id="9"> 9</span> <span id="10"> 10</span> <span id="11"> 11</span> <span id="12"> 12</span> <span id="13"> 13</span> <span id="14"> 14</span> <span id="15"> 15</span> <span id="16"> 16</span> <span id="17"> 17</span> <span 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id="174">174</span> <span id="175">175</span> <span id="176">176</span> <span id="177">177</span> <span id="178">178</span> <span id="179">179</span> <span id="180">180</span> <span id="181">181</span> <span id="182">182</span> <span id="183">183</span> <span id="184">184</span> <span id="185">185</span> <span id="186">186</span> <span id="187">187</span> <span id="188">188</span> <span id="189">189</span> <span id="190">190</span> <span id="191">191</span> <span id="192">192</span> <span id="193">193</span> <span id="194">194</span> <span id="195">195</span> <span id="196">196</span> <span id="197">197</span> <span id="198">198</span> <span id="199">199</span> <span id="200">200</span> <span id="201">201</span> <span id="202">202</span> <span id="203">203</span> <span id="204">204</span> <span id="205">205</span> <span id="206">206</span> <span id="207">207</span> <span id="208">208</span> </pre><pre class="rust "> <span class="kw">use</span> <span class="ident">futures</span>::{<span class="ident">Async</span>, <span class="ident">Future</span>, <span class="ident">Poll</span>}; <span class="kw">use</span> <span class="kw">super</span>::<span class="ident">message</span>::<span class="ident">Request</span>; <span class="kw">use</span> <span class="kw">super</span>::<span class="ident">Writer</span>; <span class="kw">use</span> <span class="ident">error</span>::<span class="ident">Error</span>; <span class="doccomment">/// Low level http request handler</span> <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_variables</span>)]</span> <span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">HttpHandler</span>: <span class="lifetime">'static</span> { <span class="doccomment">/// Request handling task</span> <span class="kw">type</span> <span class="ident">Task</span>: <span class="ident">HttpHandlerTask</span>; <span class="doccomment">/// Handle request</span> <span class="kw">fn</span> <span class="ident">handle</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">req</span>: <span class="ident">Request</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span>::<span class="ident">Task</span>, <span class="ident">Request</span><span class="op">></span>; } <span class="kw">impl</span> <span class="ident">HttpHandler</span> <span class="kw">for</span> <span class="ident">Box</span><span class="op"><</span><span class="ident">HttpHandler</span><span class="op"><</span><span class="ident">Task</span> <span class="op">=</span> <span class="ident">Box</span><span class="op"><</span><span class="ident">HttpHandlerTask</span><span class="op">>></span><span class="op">></span> { <span class="kw">type</span> <span class="ident">Task</span> <span class="op">=</span> <span class="ident">Box</span><span class="op"><</span><span class="ident">HttpHandlerTask</span><span class="op">></span>; <span class="kw">fn</span> <span class="ident">handle</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">req</span>: <span class="ident">Request</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Box</span><span class="op"><</span><span class="ident">HttpHandlerTask</span><span class="op">></span>, <span class="ident">Request</span><span class="op">></span> { <span class="self">self</span>.<span class="ident">as_ref</span>().<span class="ident">handle</span>(<span class="ident">req</span>) } } <span class="doccomment">/// Low level http request handler</span> <span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">HttpHandlerTask</span> { <span class="doccomment">/// Poll task, this method is used before or after *io* object is available</span> <span class="kw">fn</span> <span class="ident">poll_completed</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">Poll</span><span class="op"><</span>(), <span class="ident">Error</span><span class="op">></span> { <span class="prelude-val">Ok</span>(<span class="ident">Async</span>::<span class="ident">Ready</span>(())) } <span class="doccomment">/// Poll task when *io* object is available</span> <span class="kw">fn</span> <span class="ident">poll_io</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">io</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Writer</span>) <span class="op">-></span> <span class="ident">Poll</span><span class="op"><</span><span class="ident">bool</span>, <span class="ident">Error</span><span class="op">></span>; <span class="doccomment">/// Connection is disconnected</span> <span class="kw">fn</span> <span class="ident">disconnected</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) {} } <span class="kw">impl</span> <span class="ident">HttpHandlerTask</span> <span class="kw">for</span> <span class="ident">Box</span><span class="op"><</span><span class="ident">HttpHandlerTask</span><span class="op">></span> { <span class="kw">fn</span> <span class="ident">poll_io</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">io</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Writer</span>) <span class="op">-></span> <span class="ident">Poll</span><span class="op"><</span><span class="ident">bool</span>, <span class="ident">Error</span><span class="op">></span> { <span class="self">self</span>.<span class="ident">as_mut</span>().<span class="ident">poll_io</span>(<span class="ident">io</span>) } } <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">struct</span> <span class="ident">HttpHandlerTaskFut</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">HttpHandlerTask</span><span class="op">></span> { <span class="ident">task</span>: <span class="ident">T</span>, } <span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">HttpHandlerTask</span><span class="op">></span> <span class="ident">HttpHandlerTaskFut</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> { <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">task</span>: <span class="ident">T</span>) <span class="op">-></span> <span class="self">Self</span> { <span class="self">Self</span> { <span class="ident">task</span> } } } <span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">HttpHandlerTask</span><span class="op">></span> <span class="ident">Future</span> <span class="kw">for</span> <span class="ident">HttpHandlerTaskFut</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> { <span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> (); <span class="kw">type</span> <span class="ident">Error</span> <span class="op">=</span> (); <span class="kw">fn</span> <span class="ident">poll</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">Poll</span><span class="op"><</span>(), ()<span class="op">></span> { <span class="self">self</span>.<span class="ident">task</span>.<span class="ident">poll_completed</span>().<span class="ident">map_err</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> ()) } } <span class="doccomment">/// Conversion helper trait</span> <span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">IntoHttpHandler</span> { <span class="doccomment">/// The associated type which is result of conversion.</span> <span class="kw">type</span> <span class="ident">Handler</span>: <span class="ident">HttpHandler</span>; <span class="doccomment">/// Convert into `HttpHandler` object.</span> <span class="kw">fn</span> <span class="ident">into_handler</span>(<span class="self">self</span>) <span class="op">-></span> <span class="self">Self</span>::<span class="ident">Handler</span>; } <span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">HttpHandler</span><span class="op">></span> <span class="ident">IntoHttpHandler</span> <span class="kw">for</span> <span class="ident">T</span> { <span class="kw">type</span> <span class="ident">Handler</span> <span class="op">=</span> <span class="ident">T</span>; <span class="kw">fn</span> <span class="ident">into_handler</span>(<span class="self">self</span>) <span class="op">-></span> <span class="self">Self</span>::<span class="ident">Handler</span> { <span class="self">self</span> } } <span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">IntoHttpHandler</span><span class="op">></span> <span class="ident">IntoHttpHandler</span> <span class="kw">for</span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> { <span class="kw">type</span> <span class="ident">Handler</span> <span class="op">=</span> <span class="ident">VecHttpHandler</span><span class="op"><</span><span class="ident">T</span>::<span class="ident">Handler</span><span class="op">></span>; <span class="kw">fn</span> <span class="ident">into_handler</span>(<span class="self">self</span>) <span class="op">-></span> <span class="self">Self</span>::<span class="ident">Handler</span> { <span class="ident">VecHttpHandler</span>(<span class="self">self</span>.<span class="ident">into_iter</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">item</span><span class="op">|</span> <span class="ident">item</span>.<span class="ident">into_handler</span>()).<span class="ident">collect</span>()) } } <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">VecHttpHandler</span><span class="op"><</span><span class="ident">H</span>: <span class="ident">HttpHandler</span><span class="op">></span>(<span class="ident">Vec</span><span class="op"><</span><span class="ident">H</span><span class="op">></span>); <span class="kw">impl</span><span class="op"><</span><span class="ident">H</span>: <span class="ident">HttpHandler</span><span class="op">></span> <span class="ident">HttpHandler</span> <span class="kw">for</span> <span class="ident">VecHttpHandler</span><span class="op"><</span><span class="ident">H</span><span class="op">></span> { <span class="kw">type</span> <span class="ident">Task</span> <span class="op">=</span> <span class="ident">H</span>::<span class="ident">Task</span>; <span class="kw">fn</span> <span class="ident">handle</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="kw-2">mut</span> <span class="ident">req</span>: <span class="ident">Request</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span>::<span class="ident">Task</span>, <span class="ident">Request</span><span class="op">></span> { <span class="kw">for</span> <span class="ident">h</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="self">self</span>.<span class="number">0</span> { <span class="ident">req</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">h</span>.<span class="ident">handle</span>(<span class="ident">req</span>) { <span class="prelude-val">Ok</span>(<span class="ident">task</span>) <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">task</span>), <span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=></span> <span class="ident">e</span>, }; } <span class="prelude-val">Err</span>(<span class="ident">req</span>) } } <span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">http_handler</span> ({<span class="macro-nonterminal">$</span><span class="macro-nonterminal">EN</span>:<span class="ident">ident</span>, $((<span class="macro-nonterminal">$</span><span class="macro-nonterminal">n</span>:<span class="ident">tt</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">T</span>:<span class="ident">ident</span>)),<span class="op">+</span>} <span class="op">=></span> { <span class="kw">impl</span><span class="op"><</span>$(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">T</span>: <span class="ident">HttpHandler</span>,)<span class="op">+</span><span class="op">></span> <span class="ident">HttpHandler</span> <span class="kw">for</span> ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">T</span>,)<span class="op">+</span>) { <span class="kw">type</span> <span class="ident">Task</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">EN</span><span class="op"><</span>$(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">T</span>,)<span class="op">+</span><span class="op">></span>; <span class="kw">fn</span> <span class="ident">handle</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="kw-2">mut</span> <span class="ident">req</span>: <span class="ident">Request</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span>::<span class="ident">Task</span>, <span class="ident">Request</span><span class="op">></span> { $( <span class="ident">req</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="macro-nonterminal">$</span><span class="macro-nonterminal">n</span>.<span class="ident">handle</span>(<span class="ident">req</span>) { <span class="prelude-val">Ok</span>(<span class="ident">task</span>) <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">EN</span>::<span class="macro-nonterminal">$</span><span class="macro-nonterminal">T</span>(<span class="ident">task</span>)), <span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=></span> <span class="ident">e</span>, }; )<span class="op">+</span> <span class="prelude-val">Err</span>(<span class="ident">req</span>) } } <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> <span class="kw">pub</span> <span class="kw">enum</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">EN</span><span class="op"><</span>$(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">T</span>: <span class="ident">HttpHandler</span>,)<span class="op">+</span><span class="op">></span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">T</span> (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">T</span>::<span class="ident">Task</span>),)<span class="op">+</span> } <span class="kw">impl</span><span class="op"><</span>$(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">T</span>: <span class="ident">HttpHandler</span>,)<span class="op">+</span><span class="op">></span> <span class="ident">HttpHandlerTask</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">EN</span><span class="op"><</span>$(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">T</span>,)<span class="op">+</span><span class="op">></span> { <span class="kw">fn</span> <span class="ident">poll_completed</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">Poll</span><span class="op"><</span>(), <span class="ident">Error</span><span class="op">></span> { <span class="kw">match</span> <span class="self">self</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">EN</span> :: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">T</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">task</span>) <span class="op">=></span> <span class="ident">task</span>.<span class="ident">poll_completed</span>(),)<span class="op">+</span> } } <span class="kw">fn</span> <span class="ident">poll_io</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">io</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Writer</span>) <span class="op">-></span> <span class="ident">Poll</span><span class="op"><</span><span class="ident">bool</span>, <span class="ident">Error</span><span class="op">></span> { <span class="kw">match</span> <span class="self">self</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">EN</span>::<span class="macro-nonterminal">$</span><span class="macro-nonterminal">T</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">task</span>) <span class="op">=></span> <span class="ident">task</span>.<span class="ident">poll_io</span>(<span class="ident">io</span>),)<span class="op">+</span> } } <span class="doccomment">/// Connection is disconnected</span> <span class="kw">fn</span> <span class="ident">disconnected</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) { <span class="kw">match</span> <span class="self">self</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">EN</span>::<span class="macro-nonterminal">$</span><span class="macro-nonterminal">T</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">task</span>) <span class="op">=></span> <span class="ident">task</span>.<span class="ident">disconnected</span>(),)<span class="op">+</span> } } } }); <span class="macro">http_handler</span><span class="macro">!</span>(<span class="ident">HttpHandlerTask1</span>, (<span class="number">0</span>, <span class="ident">A</span>)); <span class="macro">http_handler</span><span class="macro">!</span>(<span class="ident">HttpHandlerTask2</span>, (<span class="number">0</span>, <span class="ident">A</span>), (<span class="number">1</span>, <span class="ident">B</span>)); <span class="macro">http_handler</span><span class="macro">!</span>(<span class="ident">HttpHandlerTask3</span>, (<span class="number">0</span>, <span class="ident">A</span>), (<span class="number">1</span>, <span class="ident">B</span>), (<span class="number">2</span>, <span class="ident">C</span>)); <span class="macro">http_handler</span><span class="macro">!</span>(<span class="ident">HttpHandlerTask4</span>, (<span class="number">0</span>, <span class="ident">A</span>), (<span class="number">1</span>, <span class="ident">B</span>), (<span class="number">2</span>, <span class="ident">C</span>), (<span class="number">3</span>, <span class="ident">D</span>)); <span class="macro">http_handler</span><span class="macro">!</span>(<span class="ident">HttpHandlerTask5</span>, (<span class="number">0</span>, <span class="ident">A</span>), (<span class="number">1</span>, <span class="ident">B</span>), (<span class="number">2</span>, <span class="ident">C</span>), (<span class="number">3</span>, <span class="ident">D</span>), (<span class="number">4</span>, <span class="ident">E</span>)); <span class="macro">http_handler</span><span class="macro">!</span>( <span class="ident">HttpHandlerTask6</span>, (<span class="number">0</span>, <span class="ident">A</span>), (<span class="number">1</span>, <span class="ident">B</span>), (<span class="number">2</span>, <span class="ident">C</span>), (<span class="number">3</span>, <span class="ident">D</span>), (<span class="number">4</span>, <span class="ident">E</span>), (<span class="number">5</span>, <span class="ident">F</span>) ); <span class="macro">http_handler</span><span class="macro">!</span>( <span class="ident">HttpHandlerTask7</span>, (<span class="number">0</span>, <span class="ident">A</span>), (<span class="number">1</span>, <span class="ident">B</span>), (<span class="number">2</span>, <span class="ident">C</span>), (<span class="number">3</span>, <span class="ident">D</span>), (<span class="number">4</span>, <span class="ident">E</span>), (<span class="number">5</span>, <span class="ident">F</span>), (<span class="number">6</span>, <span class="ident">G</span>) ); <span class="macro">http_handler</span><span class="macro">!</span>( <span class="ident">HttpHandlerTask8</span>, (<span class="number">0</span>, <span class="ident">A</span>), (<span class="number">1</span>, <span class="ident">B</span>), (<span class="number">2</span>, <span class="ident">C</span>), (<span class="number">3</span>, <span class="ident">D</span>), (<span class="number">4</span>, <span class="ident">E</span>), (<span class="number">5</span>, <span class="ident">F</span>), (<span class="number">6</span>, <span class="ident">G</span>), (<span class="number">7</span>, <span class="ident">H</span>) ); <span class="macro">http_handler</span><span class="macro">!</span>( <span class="ident">HttpHandlerTask9</span>, (<span class="number">0</span>, <span class="ident">A</span>), (<span class="number">1</span>, <span class="ident">B</span>), (<span class="number">2</span>, <span class="ident">C</span>), (<span class="number">3</span>, <span class="ident">D</span>), (<span class="number">4</span>, <span class="ident">E</span>), (<span class="number">5</span>, <span class="ident">F</span>), (<span class="number">6</span>, <span class="ident">G</span>), (<span class="number">7</span>, <span class="ident">H</span>), (<span class="number">8</span>, <span class="ident">I</span>) ); <span class="macro">http_handler</span><span class="macro">!</span>( <span class="ident">HttpHandlerTask10</span>, (<span class="number">0</span>, <span class="ident">A</span>), (<span class="number">1</span>, <span class="ident">B</span>), (<span class="number">2</span>, <span class="ident">C</span>), (<span class="number">3</span>, <span class="ident">D</span>), (<span class="number">4</span>, <span class="ident">E</span>), (<span class="number">5</span>, <span class="ident">F</span>), (<span class="number">6</span>, <span class="ident">G</span>), (<span class="number">7</span>, <span class="ident">H</span>), (<span class="number">8</span>, <span class="ident">I</span>), (<span class="number">9</span>, <span class="ident">J</span>) ); </pre> </section><section id="search" class="content hidden"></section><section class="footer"></section><aside id="help" class="hidden"><div><h1 class="hidden">Help</h1><div class="shortcuts"><h2>Keyboard Shortcuts</h2><dl><dt><kbd>?</kbd></dt><dd>Show this help dialog</dd><dt><kbd>S</kbd></dt><dd>Focus the search field</dd><dt><kbd>↑</kbd></dt><dd>Move up in search results</dd><dt><kbd>↓</kbd></dt><dd>Move down in search results</dd><dt><kbd>↹</kbd></dt><dd>Switch tab</dd><dt><kbd>⏎</kbd></dt><dd>Go to active search result</dd><dt><kbd>+</kbd></dt><dd>Expand all sections</dd><dt><kbd>-</kbd></dt><dd>Collapse all sections</dd></dl></div><div class="infos"><h2>Search Tricks</h2><p>Prefix searches with a type followed by a colon (e.g. 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