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</a><div class="sidebar-elems"><h2 class="location"><a href="index.html">In halo2_gadgets::utilities</a></h2><div id="sidebar-vars" data-name="bool_check" data-ty="fn" data-relpath=""></div><script defer src="sidebar-items.js"></script></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../../halo2_gadgets/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><nav class="sub"><div class="theme-picker hidden"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu" title="themes"><img width="22" height="22" alt="Pick another theme!" src="../../brush.svg"></button><div id="theme-choices" role="menu"></div></div><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press S to search, ? for more options…" type="search"><button type="button" id="help-button" title="help">?</button><a id="settings-menu" href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></form></nav></div><section id="main-content" class="content"><div class="main-heading">
<h1 class="fqn"><span class="in-band">Function <a href="../index.html">halo2_gadgets</a>::<wbr><a href="index.html">utilities</a>::<wbr><a class="fn" href="#">bool_check</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../../src/halo2_gadgets/utilities.rs.html#75-77">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">&#x2212;</span>]</a></span></div><div class="docblock item-decl"><pre class="rust fn"><code>pub fn bool_check&lt;F:&nbsp;FieldExt&gt;(value: <a class="enum" href="../../halo2_proofs/plonk/circuit/enum.Expression.html" title="enum halo2_proofs::plonk::circuit::Expression">Expression</a>&lt;F&gt;) -&gt; <a class="enum" href="../../halo2_proofs/plonk/circuit/enum.Expression.html" title="enum halo2_proofs::plonk::circuit::Expression">Expression</a>&lt;F&gt;</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Checks that an expression is either 1 or 0.</p>
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