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<!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="Searcher for finding type params in an iterator."><title>CollectTypeParams in darling::usage - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-ac92e1bbe349e143.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="darling" data-themes="" data-resource-suffix="" data-rustdoc-version="1.76.0 (07dca489a 2024-02-04)" data-channel="1.76.0" data-search-js="search-2b6ce74ff89ae146.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../../static.files/storage-f2adc0d6ca4d09fb.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-305769736d49e732.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-feafe1bb7466e4bd.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-16x16-8b506e7a72182f1c.png"><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc trait"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">&#9776;</button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../darling/index.html">darling</a><span class="version">0.20.3</span></h2></div><h2 class="location"><a href="#">CollectTypeParams</a></h2><div class="sidebar-elems"><section><h3><a href="#required-methods">Required Methods</a></h3><ul class="block"><li><a href="#tymethod.collect_type_params">collect_type_params</a></li><li><a href="#tymethod.collect_type_params_cloned">collect_type_params_cloned</a></li></ul><h3><a href="#implementors">Implementors</a></h3></section><h2><a href="index.html">In darling::usage</a></h2></div></nav><div class="sidebar-resizer"></div>
<main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../../darling/all.html" title="show sidebar"></a></div><input class="search-input" name="search" aria-label="Run search in the documentation" autocomplete="off" spellcheck="false" placeholder="Click or press S to search, ? for more options…" type="search"><div id="help-button" tabindex="-1"><a href="../../help.html" title="help">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1>Trait <a href="../index.html">darling</a>::<wbr><a href="index.html">usage</a>::<wbr><a class="trait" href="#">CollectTypeParams</a><button id="copy-path" title="Copy item path to clipboard"><img src="../../static.files/clipboard-7571035ce49a181d.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="src" href="../../src/darling_core/usage/type_params.rs.html#28">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>&#x2212;</span>]</button></span></div><pre class="rust item-decl"><code>pub trait CollectTypeParams {
// Required methods
fn <a href="#tymethod.collect_type_params" class="fn">collect_type_params</a>&lt;'a&gt;(
self,
options: &amp;<a class="struct" href="struct.Options.html" title="struct darling::usage::Options">Options</a>,
type_set: &amp;'a <a class="struct" href="https://doc.rust-lang.org/1.76.0/std/collections/hash/set/struct.HashSet.html" title="struct std::collections::hash::set::HashSet">HashSet</a>&lt;<a class="struct" href="../../proc_macro2/struct.Ident.html" title="struct proc_macro2::Ident">Ident</a>, <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/hash/struct.BuildHasherDefault.html" title="struct core::hash::BuildHasherDefault">BuildHasherDefault</a>&lt;<a class="struct" href="../../fnv/struct.FnvHasher.html" title="struct fnv::FnvHasher">FnvHasher</a>&gt;&gt;
) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.76.0/std/collections/hash/set/struct.HashSet.html" title="struct std::collections::hash::set::HashSet">HashSet</a>&lt;&amp;'a <a class="struct" href="../../proc_macro2/struct.Ident.html" title="struct proc_macro2::Ident">Ident</a>, <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/hash/struct.BuildHasherDefault.html" title="struct core::hash::BuildHasherDefault">BuildHasherDefault</a>&lt;<a class="struct" href="../../fnv/struct.FnvHasher.html" title="struct fnv::FnvHasher">FnvHasher</a>&gt;&gt;;
<span class="item-spacer"></span> fn <a href="#tymethod.collect_type_params_cloned" class="fn">collect_type_params_cloned</a>(
self,
options: &amp;<a class="struct" href="struct.Options.html" title="struct darling::usage::Options">Options</a>,
type_set: &amp;<a class="struct" href="https://doc.rust-lang.org/1.76.0/std/collections/hash/set/struct.HashSet.html" title="struct std::collections::hash::set::HashSet">HashSet</a>&lt;<a class="struct" href="../../proc_macro2/struct.Ident.html" title="struct proc_macro2::Ident">Ident</a>, <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/hash/struct.BuildHasherDefault.html" title="struct core::hash::BuildHasherDefault">BuildHasherDefault</a>&lt;<a class="struct" href="../../fnv/struct.FnvHasher.html" title="struct fnv::FnvHasher">FnvHasher</a>&gt;&gt;
) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.76.0/std/collections/hash/set/struct.HashSet.html" title="struct std::collections::hash::set::HashSet">HashSet</a>&lt;<a class="struct" href="../../proc_macro2/struct.Ident.html" title="struct proc_macro2::Ident">Ident</a>, <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/hash/struct.BuildHasherDefault.html" title="struct core::hash::BuildHasherDefault">BuildHasherDefault</a>&lt;<a class="struct" href="../../fnv/struct.FnvHasher.html" title="struct fnv::FnvHasher">FnvHasher</a>&gt;&gt;;
}</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Searcher for finding type params in an iterator.</p>
<p>This trait extends iterators, providing a way to turn a filtered list of fields or variants into a set
of type parameter idents.</p>
</div></details><h2 id="required-methods" class="section-header">Required Methods<a href="#required-methods" class="anchor">§</a></h2><div class="methods"><details class="toggle method-toggle" open><summary><section id="tymethod.collect_type_params" class="method"><a class="src rightside" href="../../src/darling_core/usage/type_params.rs.html#30">source</a><h4 class="code-header">fn <a href="#tymethod.collect_type_params" class="fn">collect_type_params</a>&lt;'a&gt;(
self,
options: &amp;<a class="struct" href="struct.Options.html" title="struct darling::usage::Options">Options</a>,
type_set: &amp;'a <a class="struct" href="https://doc.rust-lang.org/1.76.0/std/collections/hash/set/struct.HashSet.html" title="struct std::collections::hash::set::HashSet">HashSet</a>&lt;<a class="struct" href="../../proc_macro2/struct.Ident.html" title="struct proc_macro2::Ident">Ident</a>, <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/hash/struct.BuildHasherDefault.html" title="struct core::hash::BuildHasherDefault">BuildHasherDefault</a>&lt;<a class="struct" href="../../fnv/struct.FnvHasher.html" title="struct fnv::FnvHasher">FnvHasher</a>&gt;&gt;
) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.76.0/std/collections/hash/set/struct.HashSet.html" title="struct std::collections::hash::set::HashSet">HashSet</a>&lt;&amp;'a <a class="struct" href="../../proc_macro2/struct.Ident.html" title="struct proc_macro2::Ident">Ident</a>, <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/hash/struct.BuildHasherDefault.html" title="struct core::hash::BuildHasherDefault">BuildHasherDefault</a>&lt;<a class="struct" href="../../fnv/struct.FnvHasher.html" title="struct fnv::FnvHasher">FnvHasher</a>&gt;&gt;</h4></section></summary><div class="docblock"><p>Consume an iterator, accumulating all type parameters in the elements which occur in <code>type_set</code>.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="tymethod.collect_type_params_cloned" class="method"><a class="src rightside" href="../../src/darling_core/usage/type_params.rs.html#33">source</a><h4 class="code-header">fn <a href="#tymethod.collect_type_params_cloned" class="fn">collect_type_params_cloned</a>(
self,
options: &amp;<a class="struct" href="struct.Options.html" title="struct darling::usage::Options">Options</a>,
type_set: &amp;<a class="struct" href="https://doc.rust-lang.org/1.76.0/std/collections/hash/set/struct.HashSet.html" title="struct std::collections::hash::set::HashSet">HashSet</a>&lt;<a class="struct" href="../../proc_macro2/struct.Ident.html" title="struct proc_macro2::Ident">Ident</a>, <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/hash/struct.BuildHasherDefault.html" title="struct core::hash::BuildHasherDefault">BuildHasherDefault</a>&lt;<a class="struct" href="../../fnv/struct.FnvHasher.html" title="struct fnv::FnvHasher">FnvHasher</a>&gt;&gt;
) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.76.0/std/collections/hash/set/struct.HashSet.html" title="struct std::collections::hash::set::HashSet">HashSet</a>&lt;<a class="struct" href="../../proc_macro2/struct.Ident.html" title="struct proc_macro2::Ident">Ident</a>, <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/hash/struct.BuildHasherDefault.html" title="struct core::hash::BuildHasherDefault">BuildHasherDefault</a>&lt;<a class="struct" href="../../fnv/struct.FnvHasher.html" title="struct fnv::FnvHasher">FnvHasher</a>&gt;&gt;</h4></section></summary><div class="docblock"><p>Consume an iterator using <code>collect_type_params</code>, then clone all found type params and return that set.</p>
</div></details></div><h2 id="implementors" class="section-header">Implementors<a href="#implementors" class="anchor">§</a></h2><div id="implementors-list"><section id="impl-CollectTypeParams-for-T" class="impl"><a class="src rightside" href="../../src/darling_core/usage/type_params.rs.html#36-39">source</a><a href="#impl-CollectTypeParams-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;'i, T, I&gt; <a class="trait" href="trait.CollectTypeParams.html" title="trait darling::usage::CollectTypeParams">CollectTypeParams</a> for T<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/iter/traits/collect/trait.IntoIterator.html" title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a>&lt;Item = <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&amp;'i I</a>&gt;,
I: 'i + <a class="trait" href="trait.UsesTypeParams.html" title="trait darling::usage::UsesTypeParams">UsesTypeParams</a>,</div></h3></section></div><script src="../../trait.impl/darling_core/usage/type_params/trait.CollectTypeParams.js" async></script></section></div></main></body></html>