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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="This is a trait that circuits provide implementations for so that the backend prover can ask the circuit to synthesize using some given [`ConstraintSystem`] implementation."><meta name="keywords" content="rust, rustlang, rust-lang, Circuit"><title>Circuit in halo2_proofs::plonk - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><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="../../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../../dark.css" disabled><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script src="../../crates.js"></script><script defer src="../../main.js"></script>
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</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><a class="sidebar-logo" href="../../halo2_proofs/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div>
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<nav class="sidebar"><a class="sidebar-logo" href="../../halo2_proofs/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div>
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</a><h2 class="location"><a href="#">Circuit</a></h2><div class="sidebar-elems"><section><div class="block"><h3 class="sidebar-title"><a href="#required-associated-types">Required Associated Types</a></h3><ul><li><a href="#associatedtype.Config">Config</a></li><li><a href="#associatedtype.FloorPlanner">FloorPlanner</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#required-methods">Required Methods</a></h3><ul><li><a href="#tymethod.configure">configure</a></li><li><a href="#tymethod.synthesize">synthesize</a></li><li><a href="#tymethod.without_witnesses">without_witnesses</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#implementors">Implementors</a></h3></div></section><h2 class="location"><a href="index.html">In halo2_proofs::plonk</a></h2><div id="sidebar-vars" data-name="Circuit" data-ty="trait" 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_proofs/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">
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<h1 class="fqn"><span class="in-band">Trait <a href="../index.html">halo2_proofs</a>::<wbr><a href="index.html">plonk</a>::<wbr><a class="trait" href="#">Circuit</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_proofs/plonk/circuit.rs.html#423-442">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="docblock item-decl"><pre class="rust trait"><code>pub trait Circuit<F: <a class="trait" href="../arithmetic/trait.Field.html" title="trait halo2_proofs::arithmetic::Field">Field</a>> {
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type <a href="#associatedtype.Config" class="associatedtype">Config</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>;
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type <a href="#associatedtype.FloorPlanner" class="associatedtype">FloorPlanner</a>: <a class="trait" href="trait.FloorPlanner.html" title="trait halo2_proofs::plonk::FloorPlanner">FloorPlanner</a>;
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fn <a href="#tymethod.without_witnesses" class="fnname">without_witnesses</a>(&self) -> Self;
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<span class="item-spacer"></span> fn <a href="#tymethod.configure" class="fnname">configure</a>(meta: &mut <a class="struct" href="struct.ConstraintSystem.html" title="struct halo2_proofs::plonk::ConstraintSystem">ConstraintSystem</a><F>) -> Self::<a class="associatedtype" href="trait.Circuit.html#associatedtype.Config" title="type halo2_proofs::plonk::Circuit::Config">Config</a>;
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<span class="item-spacer"></span> fn <a href="#tymethod.synthesize" class="fnname">synthesize</a>(<br> &self, <br> config: Self::<a class="associatedtype" href="trait.Circuit.html#associatedtype.Config" title="type halo2_proofs::plonk::Circuit::Config">Config</a>, <br> layouter: impl <a class="trait" href="../circuit/trait.Layouter.html" title="trait halo2_proofs::circuit::Layouter">Layouter</a><F><br> ) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="enum" href="enum.Error.html" title="enum halo2_proofs::plonk::Error">Error</a>>;
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}</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>This is a trait that circuits provide implementations for so that the
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backend prover can ask the circuit to synthesize using some given
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<a href="struct.ConstraintSystem.html" title="ConstraintSystem"><code>ConstraintSystem</code></a> implementation.</p>
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</div></details><h2 id="required-associated-types" class="small-section-header">Required Associated Types<a href="#required-associated-types" class="anchor"></a></h2><div class="methods"><details class="rustdoc-toggle" open><summary><div id="associatedtype.Config" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/halo2_proofs/plonk/circuit.rs.html#425">source</a></div><h4 class="code-header">type <a href="#associatedtype.Config" class="associatedtype">Config</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a></h4></div></summary><div class="docblock"><p>This is a configuration object that stores things like columns.</p>
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</div></details><details class="rustdoc-toggle" open><summary><div id="associatedtype.FloorPlanner" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/halo2_proofs/plonk/circuit.rs.html#428">source</a></div><h4 class="code-header">type <a href="#associatedtype.FloorPlanner" class="associatedtype">FloorPlanner</a>: <a class="trait" href="trait.FloorPlanner.html" title="trait halo2_proofs::plonk::FloorPlanner">FloorPlanner</a></h4></div></summary><div class="docblock"><p>The floor planner used for this circuit. This is an associated type of the
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<code>Circuit</code> trait because its behaviour is circuit-critical.</p>
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</div></details></div><h2 id="required-methods" class="small-section-header">Required Methods<a href="#required-methods" class="anchor"></a></h2><div class="methods"><details class="rustdoc-toggle" open><summary><div id="tymethod.without_witnesses" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/halo2_proofs/plonk/circuit.rs.html#432">source</a></div><h4 class="code-header">fn <a href="#tymethod.without_witnesses" class="fnname">without_witnesses</a>(&self) -> Self</h4></div></summary><div class="docblock"><p>Returns a copy of this circuit with no witness values (i.e. all witnesses set to
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<code>None</code>). For most circuits, this will be equal to <code>Self::default()</code>.</p>
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</div></details><details class="rustdoc-toggle" open><summary><div id="tymethod.configure" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/halo2_proofs/plonk/circuit.rs.html#436">source</a></div><h4 class="code-header">fn <a href="#tymethod.configure" class="fnname">configure</a>(meta: &mut <a class="struct" href="struct.ConstraintSystem.html" title="struct halo2_proofs::plonk::ConstraintSystem">ConstraintSystem</a><F>) -> Self::<a class="associatedtype" href="trait.Circuit.html#associatedtype.Config" title="type halo2_proofs::plonk::Circuit::Config">Config</a></h4></div></summary><div class="docblock"><p>The circuit is given an opportunity to describe the exact gate
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arrangement, column arrangement, etc.</p>
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</div></details><details class="rustdoc-toggle" open><summary><div id="tymethod.synthesize" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/halo2_proofs/plonk/circuit.rs.html#441">source</a></div><h4 class="code-header">fn <a href="#tymethod.synthesize" class="fnname">synthesize</a>(<br> &self, <br> config: Self::<a class="associatedtype" href="trait.Circuit.html#associatedtype.Config" title="type halo2_proofs::plonk::Circuit::Config">Config</a>, <br> layouter: impl <a class="trait" href="../circuit/trait.Layouter.html" title="trait halo2_proofs::circuit::Layouter">Layouter</a><F><br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="enum" href="enum.Error.html" title="enum halo2_proofs::plonk::Error">Error</a>></h4></div></summary><div class="docblock"><p>Given the provided <code>cs</code>, synthesize the circuit. The concrete type of
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the caller will be different depending on the context, and they may or
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may not expect to have a witness present.</p>
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</div></details></div><h2 id="implementors" class="small-section-header">Implementors<a href="#implementors" class="anchor"></a></h2><div class="item-list" id="implementors-list"></div><script type="text/javascript" src="../../implementors/halo2_proofs/plonk/trait.Circuit.js" async></script></section><section id="search" class="content hidden"></section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="halo2_proofs" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.62.0-nightly (7c4b47696 2022-04-30)" ></div>
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