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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="Extension trait for `GenericParam` to support getting values by variant."><title>GenericParamExt in darling_core::ast - 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_core" 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">☰</button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../darling_core/index.html">darling_core</a><span class="version">0.20.3</span></h2></div><h2 class="location"><a href="#">GenericParamExt</a></h2><div class="sidebar-elems"><section><h3><a href="#required-associated-types">Required Associated Types</a></h3><ul class="block"><li><a href="#associatedtype.ConstParam">ConstParam</a></li><li><a href="#associatedtype.LifetimeParam">LifetimeParam</a></li><li><a href="#associatedtype.TypeParam">TypeParam</a></li></ul><h3><a href="#provided-methods">Provided Methods</a></h3><ul class="block"><li><a href="#method.as_const_param">as_const_param</a></li><li><a href="#method.as_lifetime_param">as_lifetime_param</a></li><li><a href="#method.as_type_param">as_type_param</a></li></ul><h3><a href="#foreign-impls">Implementations on Foreign Types</a></h3><ul class="block"><li><a href="#impl-GenericParamExt-for-GenericParam">GenericParam</a></li><li><a href="#impl-GenericParamExt-for-TypeParam">TypeParam</a></li></ul><h3><a href="#implementors">Implementors</a></h3></section><h2><a href="index.html">In darling_core::ast</a></h2></div></nav><div class="sidebar-resizer"></div>
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<main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../../darling_core/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_core</a>::<wbr><a href="index.html">ast</a>::<wbr><a class="trait" href="#">GenericParamExt</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/ast/generics.rs.html#14-34">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>−</span>]</button></span></div><pre class="rust item-decl"><code>pub trait GenericParamExt {
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type <a href="#associatedtype.TypeParam" class="associatedtype">TypeParam</a>;
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type <a href="#associatedtype.LifetimeParam" class="associatedtype">LifetimeParam</a>;
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type <a href="#associatedtype.ConstParam" class="associatedtype">ConstParam</a>;
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// Provided methods
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fn <a href="#method.as_type_param" class="fn">as_type_param</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&Self::<a class="associatedtype" href="trait.GenericParamExt.html#associatedtype.TypeParam" title="type darling_core::ast::GenericParamExt::TypeParam">TypeParam</a>> { ... }
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<span class="item-spacer"></span> fn <a href="#method.as_lifetime_param" class="fn">as_lifetime_param</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&Self::<a class="associatedtype" href="trait.GenericParamExt.html#associatedtype.LifetimeParam" title="type darling_core::ast::GenericParamExt::LifetimeParam">LifetimeParam</a>> { ... }
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<span class="item-spacer"></span> fn <a href="#method.as_const_param" class="fn">as_const_param</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&Self::<a class="associatedtype" href="trait.GenericParamExt.html#associatedtype.ConstParam" title="type darling_core::ast::GenericParamExt::ConstParam">ConstParam</a>> { ... }
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}</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Extension trait for <code>GenericParam</code> to support getting values by variant.</p>
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<h2 id="usage"><a href="#usage">Usage</a></h2>
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<p><code>darling::ast::Generics</code> needs a way to test its params array in order to iterate over type params.
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Rather than require callers to use <code>darling::ast::GenericParam</code> in all cases, this trait makes that
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polymorphic.</p>
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</div></details><h2 id="required-associated-types" class="section-header">Required Associated Types<a href="#required-associated-types" class="anchor">§</a></h2><div class="methods"><details class="toggle" open><summary><section id="associatedtype.TypeParam" class="method"><a class="src rightside" href="../../src/darling_core/ast/generics.rs.html#16">source</a><h4 class="code-header">type <a href="#associatedtype.TypeParam" class="associatedtype">TypeParam</a></h4></section></summary><div class="docblock"><p>The type this GenericParam uses to represent type params and their bounds</p>
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</div></details><section id="associatedtype.LifetimeParam" class="method"><a class="src rightside" href="../../src/darling_core/ast/generics.rs.html#17">source</a><h4 class="code-header">type <a href="#associatedtype.LifetimeParam" class="associatedtype">LifetimeParam</a></h4></section><section id="associatedtype.ConstParam" class="method"><a class="src rightside" href="../../src/darling_core/ast/generics.rs.html#18">source</a><h4 class="code-header">type <a href="#associatedtype.ConstParam" class="associatedtype">ConstParam</a></h4></section></div><h2 id="provided-methods" class="section-header">Provided Methods<a href="#provided-methods" class="anchor">§</a></h2><div class="methods"><details class="toggle method-toggle" open><summary><section id="method.as_type_param" class="method"><a class="src rightside" href="../../src/darling_core/ast/generics.rs.html#21-23">source</a><h4 class="code-header">fn <a href="#method.as_type_param" class="fn">as_type_param</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&Self::<a class="associatedtype" href="trait.GenericParamExt.html#associatedtype.TypeParam" title="type darling_core::ast::GenericParamExt::TypeParam">TypeParam</a>></h4></section></summary><div class="docblock"><p>If this GenericParam is a type param, get the underlying value.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.as_lifetime_param" class="method"><a class="src rightside" href="../../src/darling_core/ast/generics.rs.html#26-28">source</a><h4 class="code-header">fn <a href="#method.as_lifetime_param" class="fn">as_lifetime_param</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&Self::<a class="associatedtype" href="trait.GenericParamExt.html#associatedtype.LifetimeParam" title="type darling_core::ast::GenericParamExt::LifetimeParam">LifetimeParam</a>></h4></section></summary><div class="docblock"><p>If this GenericParam is a lifetime, get the underlying value.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.as_const_param" class="method"><a class="src rightside" href="../../src/darling_core/ast/generics.rs.html#31-33">source</a><h4 class="code-header">fn <a href="#method.as_const_param" class="fn">as_const_param</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&Self::<a class="associatedtype" href="trait.GenericParamExt.html#associatedtype.ConstParam" title="type darling_core::ast::GenericParamExt::ConstParam">ConstParam</a>></h4></section></summary><div class="docblock"><p>If this GenericParam is a const param, get the underlying value.</p>
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</div></details></div><h2 id="foreign-impls" class="section-header">Implementations on Foreign Types<a href="#foreign-impls" class="anchor">§</a></h2><details class="toggle implementors-toggle"><summary><section id="impl-GenericParamExt-for-GenericParam" class="impl"><a class="src rightside" href="../../src/darling_core/ast/generics.rs.html#36-64">source</a><a href="#impl-GenericParamExt-for-GenericParam" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.GenericParamExt.html" title="trait darling_core::ast::GenericParamExt">GenericParamExt</a> for <a class="enum" href="../../syn/generics/enum.GenericParam.html" title="enum syn::generics::GenericParam">GenericParam</a></h3></section></summary><div class="impl-items"><section id="associatedtype.TypeParam-1" class="associatedtype trait-impl"><a href="#associatedtype.TypeParam-1" class="anchor">§</a><h4 class="code-header">type <a href="#associatedtype.TypeParam" class="associatedtype">TypeParam</a> = <a class="struct" href="../../syn/generics/struct.TypeParam.html" title="struct syn::generics::TypeParam">TypeParam</a></h4></section><section id="associatedtype.LifetimeParam-1" class="associatedtype trait-impl"><a href="#associatedtype.LifetimeParam-1" class="anchor">§</a><h4 class="code-header">type <a href="#associatedtype.LifetimeParam" class="associatedtype">LifetimeParam</a> = <a class="struct" href="../../syn/generics/struct.LifetimeParam.html" title="struct syn::generics::LifetimeParam">LifetimeParam</a></h4></section><section id="associatedtype.ConstParam-1" class="associatedtype trait-impl"><a href="#associatedtype.ConstParam-1" class="anchor">§</a><h4 class="code-header">type <a href="#associatedtype.ConstParam" class="associatedtype">ConstParam</a> = <a class="struct" href="../../syn/generics/struct.ConstParam.html" title="struct syn::generics::ConstParam">ConstParam</a></h4></section><section id="method.as_type_param-1" class="method trait-impl"><a class="src rightside" href="../../src/darling_core/ast/generics.rs.html#41-47">source</a><a href="#method.as_type_param-1" class="anchor">§</a><h4 class="code-header">fn <a href="#method.as_type_param" class="fn">as_type_param</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&Self::<a class="associatedtype" href="trait.GenericParamExt.html#associatedtype.TypeParam" title="type darling_core::ast::GenericParamExt::TypeParam">TypeParam</a>></h4></section><section id="method.as_lifetime_param-1" class="method trait-impl"><a class="src rightside" href="../../src/darling_core/ast/generics.rs.html#49-55">source</a><a href="#method.as_lifetime_param-1" class="anchor">§</a><h4 class="code-header">fn <a href="#method.as_lifetime_param" class="fn">as_lifetime_param</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&Self::<a class="associatedtype" href="trait.GenericParamExt.html#associatedtype.LifetimeParam" title="type darling_core::ast::GenericParamExt::LifetimeParam">LifetimeParam</a>></h4></section><section id="method.as_const_param-1" class="method trait-impl"><a class="src rightside" href="../../src/darling_core/ast/generics.rs.html#57-63">source</a><a href="#method.as_const_param-1" class="anchor">§</a><h4 class="code-header">fn <a href="#method.as_const_param" class="fn">as_const_param</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&Self::<a class="associatedtype" href="trait.GenericParamExt.html#associatedtype.ConstParam" title="type darling_core::ast::GenericParamExt::ConstParam">ConstParam</a>></h4></section></div></details><details class="toggle implementors-toggle"><summary><section id="impl-GenericParamExt-for-TypeParam" class="impl"><a class="src rightside" href="../../src/darling_core/ast/generics.rs.html#66-74">source</a><a href="#impl-GenericParamExt-for-TypeParam" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.GenericParamExt.html" title="trait darling_core::ast::GenericParamExt">GenericParamExt</a> for <a class="struct" href="../../syn/generics/struct.TypeParam.html" title="struct syn::generics::TypeParam">TypeParam</a></h3></section></summary><div class="impl-items"><section id="associatedtype.TypeParam-2" class="associatedtype trait-impl"><a href="#associatedtype.TypeParam-2" class="anchor">§</a><h4 class="code-header">type <a href="#associatedtype.TypeParam" class="associatedtype">TypeParam</a> = <a class="struct" href="../../syn/generics/struct.TypeParam.html" title="struct syn::generics::TypeParam">TypeParam</a></h4></section><section id="associatedtype.LifetimeParam-2" class="associatedtype trait-impl"><a href="#associatedtype.LifetimeParam-2" class="anchor">§</a><h4 class="code-header">type <a href="#associatedtype.LifetimeParam" class="associatedtype">LifetimeParam</a> = <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.unit.html">()</a></h4></section><section id="associatedtype.ConstParam-2" class="associatedtype trait-impl"><a href="#associatedtype.ConstParam-2" class="anchor">§</a><h4 class="code-header">type <a href="#associatedtype.ConstParam" class="associatedtype">ConstParam</a> = <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.unit.html">()</a></h4></section><section id="method.as_type_param-2" class="method trait-impl"><a class="src rightside" href="../../src/darling_core/ast/generics.rs.html#71-73">source</a><a href="#method.as_type_param-2" class="anchor">§</a><h4 class="code-header">fn <a href="#method.as_type_param" class="fn">as_type_param</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&Self::<a class="associatedtype" href="trait.GenericParamExt.html#associatedtype.TypeParam" title="type darling_core::ast::GenericParamExt::TypeParam">TypeParam</a>></h4></section></div></details><h2 id="implementors" class="section-header">Implementors<a href="#implementors" class="anchor">§</a></h2><div id="implementors-list"><details class="toggle implementors-toggle"><summary><section id="impl-GenericParamExt-for-GenericParam%3CT,+L,+C%3E" class="impl"><a class="src rightside" href="../../src/darling_core/ast/generics.rs.html#104-132">source</a><a href="#impl-GenericParamExt-for-GenericParam%3CT,+L,+C%3E" class="anchor">§</a><h3 class="code-header">impl<T, L, C> <a class="trait" href="trait.GenericParamExt.html" title="trait darling_core::ast::GenericParamExt">GenericParamExt</a> for darling_core::ast::<a class="enum" href="enum.GenericParam.html" title="enum darling_core::ast::GenericParam">GenericParam</a><T, L, C></h3></section></summary><div class="impl-items"><section id="associatedtype.TypeParam-3" class="associatedtype trait-impl"><a href="#associatedtype.TypeParam-3" class="anchor">§</a><h4 class="code-header">type <a href="#associatedtype.TypeParam" class="associatedtype">TypeParam</a> = T</h4></section><section id="associatedtype.LifetimeParam-3" class="associatedtype trait-impl"><a href="#associatedtype.LifetimeParam-3" class="anchor">§</a><h4 class="code-header">type <a href="#associatedtype.LifetimeParam" class="associatedtype">LifetimeParam</a> = L</h4></section><section id="associatedtype.ConstParam-3" class="associatedtype trait-impl"><a href="#associatedtype.ConstParam-3" class="anchor">§</a><h4 class="code-header">type <a href="#associatedtype.ConstParam" class="associatedtype">ConstParam</a> = C</h4></section></div></details></div><script src="../../trait.impl/darling_core/ast/generics/trait.GenericParamExt.js" data-ignore-extern-crates="syn" async></script></section></div></main></body></html> |