| <!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="API documentation for the Rust `ConstKind` type in crate `hir`."><title>ConstKind in hir::next_solver - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-e56847b5.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="hir" data-themes="" data-resource-suffix="" data-rustdoc-version="1.91.1 (ed61e7d7e 2025-11-07)" data-channel="1.91.1" data-search-js="search-e256b49e.js" data-stringdex-js="stringdex-c3e638e9.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-6dc2a7f3.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc type"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">ConstKind</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../hir/index.html">hir</a><span class="version">0.0.0</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Const<wbr>Kind</a></h2><h3><a href="#aliased-type">Aliased Type</a></h3><h3><a href="#variants">Variants</a></h3><ul class="block variant"><li><a href="#variant.Bound" title="Bound">Bound</a></li><li><a href="#variant.Error" title="Error">Error</a></li><li><a href="#variant.Expr" title="Expr">Expr</a></li><li><a href="#variant.Infer" title="Infer">Infer</a></li><li><a href="#variant.Param" title="Param">Param</a></li><li><a href="#variant.Placeholder" title="Placeholder">Placeholder</a></li><li><a href="#variant.Unevaluated" title="Unevaluated">Unevaluated</a></li><li><a href="#variant.Value" title="Value">Value</a></li></ul></section><div id="rustdoc-modnav"><h2><a href="index.html">In hir::<wbr>next_<wbr>solver</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">hir</a>::<wbr><a href="index.html">next_solver</a></div><h1>Type Alias <span class="type">Const<wbr>Kind</span> <button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"></span></div><pre class="rust item-decl"><code>pub type ConstKind<'db> = ConstKind<<a class="struct" href="struct.DbInterner.html" title="struct hir::next_solver::DbInterner">DbInterner</a><'db>>;</code></pre><h2 id="aliased-type" class="section-header">Aliased Type<a href="#aliased-type" class="anchor">§</a></h2><pre class="rust item-decl"><code>pub enum ConstKind<'db> { |
| Param(<a class="struct" href="struct.ParamConst.html" title="struct hir::next_solver::ParamConst">ParamConst</a>), |
| Infer(InferConst), |
| Bound(BoundVarIndexKind, <a class="struct" href="struct.BoundConst.html" title="struct hir::next_solver::BoundConst">BoundConst</a>), |
| Placeholder(<a class="struct" href="struct.Placeholder.html" title="struct hir::next_solver::Placeholder">Placeholder</a><<a class="struct" href="struct.BoundConst.html" title="struct hir::next_solver::BoundConst">BoundConst</a>>), |
| Unevaluated(UnevaluatedConst<<a class="struct" href="struct.DbInterner.html" title="struct hir::next_solver::DbInterner">DbInterner</a><'db>>), |
| Value(<a class="struct" href="struct.ValueConst.html" title="struct hir::next_solver::ValueConst">ValueConst</a><'db>), |
| Error(<a class="struct" href="struct.ErrorGuaranteed.html" title="struct hir::next_solver::ErrorGuaranteed">ErrorGuaranteed</a>), |
| Expr(<a class="struct" href="struct.ExprConst.html" title="struct hir::next_solver::ExprConst">ExprConst</a>), |
| }</code></pre><h2 id="variants" class="variants section-header">Variants<a href="#variants" class="anchor">§</a></h2><div class="variants"><section id="variant.Param" class="variant"><a href="#variant.Param" class="anchor">§</a><h3 class="code-header">Param(<a class="struct" href="struct.ParamConst.html" title="struct hir::next_solver::ParamConst">ParamConst</a>)</h3></section><div class="docblock"><p>A const generic parameter.</p> |
| </div><section id="variant.Infer" class="variant"><a href="#variant.Infer" class="anchor">§</a><h3 class="code-header">Infer(InferConst)</h3></section><div class="docblock"><p>Infer the value of the const.</p> |
| </div><section id="variant.Bound" class="variant"><a href="#variant.Bound" class="anchor">§</a><h3 class="code-header">Bound(BoundVarIndexKind, <a class="struct" href="struct.BoundConst.html" title="struct hir::next_solver::BoundConst">BoundConst</a>)</h3></section><div class="docblock"><p>Bound const variable, used only when preparing a trait query.</p> |
| </div><section id="variant.Placeholder" class="variant"><a href="#variant.Placeholder" class="anchor">§</a><h3 class="code-header">Placeholder(<a class="struct" href="struct.Placeholder.html" title="struct hir::next_solver::Placeholder">Placeholder</a><<a class="struct" href="struct.BoundConst.html" title="struct hir::next_solver::BoundConst">BoundConst</a>>)</h3></section><div class="docblock"><p>A placeholder const - universally quantified higher-ranked const.</p> |
| </div><section id="variant.Unevaluated" class="variant"><a href="#variant.Unevaluated" class="anchor">§</a><h3 class="code-header">Unevaluated(UnevaluatedConst<<a class="struct" href="struct.DbInterner.html" title="struct hir::next_solver::DbInterner">DbInterner</a><'db>>)</h3></section><div class="docblock"><p>An unnormalized const item such as an anon const or assoc const or free const item. |
| Right now anything other than anon consts does not actually work properly but this |
| should</p> |
| </div><section id="variant.Value" class="variant"><a href="#variant.Value" class="anchor">§</a><h3 class="code-header">Value(<a class="struct" href="struct.ValueConst.html" title="struct hir::next_solver::ValueConst">ValueConst</a><'db>)</h3></section><div class="docblock"><p>Used to hold computed value.</p> |
| </div><section id="variant.Error" class="variant"><a href="#variant.Error" class="anchor">§</a><h3 class="code-header">Error(<a class="struct" href="struct.ErrorGuaranteed.html" title="struct hir::next_solver::ErrorGuaranteed">ErrorGuaranteed</a>)</h3></section><div class="docblock"><p>A placeholder for a const which could not be computed; this is |
| propagated to avoid useless error messages.</p> |
| </div><section id="variant.Expr" class="variant"><a href="#variant.Expr" class="anchor">§</a><h3 class="code-header">Expr(<a class="struct" href="struct.ExprConst.html" title="struct hir::next_solver::ExprConst">ExprConst</a>)</h3></section><div class="docblock"><p>Unevaluated non-const-item, used by <code>feature(generic_const_exprs)</code> to represent |
| const arguments such as <code>N + 1</code> or <code>foo(N)</code></p> |
| </div></div><script src="../../type.impl/ra_ap_rustc_type_ir/const_kind/enum.ConstKind.js" data-self-path="hir::next_solver::ConstKind" async></script></section></div></main></body></html> |
