<!DOCTYPE html><htmllang="en"><head><metacharset="utf-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><metaname="generator"content="rustdoc"><metaname="description"content="Returns information about a fixed point that is required by [`EccChip`]."><metaname="keywords"content="rust, rustlang, rust-lang, FixedPoint"><title>FixedPoint in halo2_gadgets::ecc::chip - Rust</title><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../../SourceSerif4-Regular.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../../FiraSans-Regular.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../../FiraSans-Medium.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../../SourceCodePro-Regular.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../../SourceSerif4-Bold.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../../SourceCodePro-Semibold.ttf.woff2"><linkrel="stylesheet"type="text/css"href="../../../normalize.css"><linkrel="stylesheet"type="text/css"href="../../../rustdoc.css"id="mainThemeStyle"><linkrel="stylesheet"type="text/css"href="../../../ayu.css"disabled><linkrel="stylesheet"type="text/css"href="../../../dark.css"disabled><linkrel="stylesheet"type="text/css"href="../../../light.css"id="themeStyle"><scriptid="default-settings"></script><scriptsrc="../../../storage.js"></script><scriptdefersrc="sidebar-items.js"></script><scriptdefersrc="../../../main.js"></script><noscript><linkrel="stylesheet"href="../../../noscript.css"></noscript><linkrel="alternate icon"type="image/png"href="../../../favicon-16x16.png"><linkrel="alternate icon"type="image/png"href="../../../favicon-32x32.png"><linkrel="icon"type="image/svg+xml"href="../../../favicon.svg"><linkrel="stylesheet"href="https://cdn.jsdelivr.net/npm/katex@0.10.0/dist/katex.min.css"integrity="sha384-9eLZqc9ds8eNjO3TmqPeYcDj8n+Qfa4nuSiGYa6DjLNcv9BtN69ZIulL9+8CqC9Y"crossorigin="anonymous">
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</a><h2class="location"><ahref="#">FixedPoint</a></h2><divclass="sidebar-elems"><section><divclass="block"><h3class="sidebar-title"><ahref="#required-associated-types">Required Associated Types</a></h3><ul><li><ahref="#associatedtype.FixedScalarKind">FixedScalarKind</a></li></ul></div><divclass="block"><h3class="sidebar-title"><ahref="#required-methods">Required Methods</a></h3><ul><li><ahref="#tymethod.generator">generator</a></li><li><ahref="#tymethod.u">u</a></li><li><ahref="#tymethod.z">z</a></li></ul></div><divclass="block"><h3class="sidebar-title"><ahref="#provided-methods">Provided Methods</a></h3><ul><li><ahref="#method.lagrange_coeffs">lagrange_coeffs</a></li></ul></div><divclass="block"><h3class="sidebar-title"><ahref="#implementors">Implementors</a></h3></div></section><h2class="location"><ahref="index.html">In halo2_gadgets::ecc::chip</a></h2></div></nav><main><divclass="width-limiter"><divclass="sub-container"><aclass="sub-logo-container"href="../../../halo2_gadgets/index.html"><imgclass="rust-logo"src="../../../rust-logo.svg"alt="logo"></a><navclass="sub"><formclass="search-form"><divclass="search-container"><span></span><inputclass="search-input"name="search"autocomplete="off"spellcheck="false"placeholder="Click or press ‘S’ to search, ‘?’ for more options…"type="search"><buttontype="button"id="help-button"title="help">?</button><divid="settings-menu"tabindex="-1">
type <ahref="#associatedtype.FixedScalarKind"class="associatedtype">FixedScalarKind</a>: <aclass="trait"href="trait.FixedScalarKind.html"title="trait halo2_gadgets::ecc::chip::FixedScalarKind">FixedScalarKind</a>;
}</code></pre></div><detailsclass="rustdoc-toggle top-doc"open><summaryclass="hideme"><span>Expand description</span></summary><divclass="docblock"><p>Returns information about a fixed point that is required by <ahref="struct.EccChip.html"title="EccChip"><code>EccChip</code></a>.</p>
</div></details><h2id="required-associated-types"class="small-section-header">Required Associated Types<ahref="#required-associated-types"class="anchor"></a></h2><divclass="methods"><detailsclass="rustdoc-toggle"open><summary><divid="associatedtype.FixedScalarKind"class="method has-srclink"><divclass="rightside"><aclass="srclink"href="../../../src/halo2_gadgets/ecc/chip.rs.html#212">source</a></div><h4class="code-header">type <ahref="#associatedtype.FixedScalarKind"class="associatedtype">FixedScalarKind</a>: <aclass="trait"href="trait.FixedScalarKind.html"title="trait halo2_gadgets::ecc::chip::FixedScalarKind">FixedScalarKind</a></h4></div></summary><divclass="docblock"><p>The kind of scalar that this fixed point can be multiplied by.</p>
</div></details></div><h2id="required-methods"class="small-section-header">Required Methods<ahref="#required-methods"class="anchor"></a></h2><divclass="methods"><detailsclass="rustdoc-toggle"open><summary><divid="tymethod.generator"class="method has-srclink"><divclass="rightside"><aclass="srclink"href="../../../src/halo2_gadgets/ecc/chip.rs.html#215">source</a></div><h4class="code-header">fn <ahref="#tymethod.generator"class="fnname">generator</a>(&self) -> C</h4></div></summary><divclass="docblock"><p>Returns the generator for this fixed point.</p>
</div></details><detailsclass="rustdoc-toggle"open><summary><divid="tymethod.u"class="method has-srclink"><divclass="rightside"><aclass="srclink"href="../../../src/halo2_gadgets/ecc/chip.rs.html#218">source</a></div><h4class="code-header">fn <ahref="#tymethod.u"class="fnname">u</a>(&self) -><aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html"title="struct alloc::vec::Vec">Vec</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.array.html">[</a><C::Base as PrimeField>::Repr<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.array.html">; 8]</a>><spanclass="notable-traits"><spanclass="notable-traits-tooltip">ⓘ<spanclass="notable-traits-tooltiptext"><spanclass="docblock"><spanclass="notable">Notable traits for <aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html"title="struct alloc::vec::Vec">Vec</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>, A></span><codeclass="content"><spanclass="where fmt-newline">impl<A><aclass="trait"href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html"title="trait std::io::Write">Write</a> for <aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html"title="struct alloc::vec::Vec">Vec</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>, A><spanclass="where fmt-newline">where<br> A: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/alloc/trait.Allocator.html"title="trait core::alloc::Allocator">Allocator</a>, </span></span></code></span></span></span></span></h4></div></summary><divclass="docblock"><p>Returns the $u$ values for this fixed point.</p>
</div></details><detailsclass="rustdoc-toggle"open><summary><divid="tymethod.z"class="method has-srclink"><divclass="rightside"><aclass="srclink"href="../../../src/halo2_gadgets/ecc/chip.rs.html#221">source</a></div><h4class="code-header">fn <ahref="#tymethod.z"class="fnname">z</a>(&self) -><aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html"title="struct alloc::vec::Vec">Vec</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a>><spanclass="notable-traits"><spanclass="notable-traits-tooltip">ⓘ<spanclass="notable-traits-tooltiptext"><spanclass="docblock"><spanclass="notable">Notable traits for <aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html"title="struct alloc::vec::Vec">Vec</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>, A></span><codeclass="content"><spanclass="where fmt-newline">impl<A><aclass="trait"href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html"title="trait std::io::Write">Write</a> for <aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html"title="struct alloc::vec::Vec">Vec</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>, A><spanclass="where fmt-newline">where<br> A: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/alloc/trait.Allocator.html"title="trait core::alloc::Allocator">Allocator</a>, </span></span></code></span></span></span></span></h4></div></summary><divclass="docblock"><p>Returns the $z$ value for this fixed point.</p>
</div></details></div><h2id="provided-methods"class="small-section-header">Provided Methods<ahref="#provided-methods"class="anchor"></a></h2><divclass="methods"><detailsclass="rustdoc-toggle"open><summary><divid="method.lagrange_coeffs"class="method has-srclink"><divclass="rightside"><aclass="srclink"href="../../../src/halo2_gadgets/ecc/chip.rs.html#224-226">source</a></div><h4class="code-header">fn <ahref="#method.lagrange_coeffs"class="fnname">lagrange_coeffs</a>(&self) -><aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html"title="struct alloc::vec::Vec">Vec</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.array.html">[</a>C::Base<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.array.html">; 8]</a>><spanclass="notable-traits"><spanclass="notable-traits-tooltip">ⓘ<spanclass="notable-traits-tooltiptext"><spanclass="docblock"><spanclass="notable">Notable traits for <aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html"title="struct alloc::vec::Vec">Vec</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>, A></span><codeclass="content"><spanclass="where fmt-newline">impl<A><aclass="trait"href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html"title="trait std::io::Write">Write</a> for <aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html"title="struct alloc::vec::Vec">Vec</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>, A><spanclass="where fmt-newline">where<br> A: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/alloc/trait.Allocator.html"title="trait core::alloc::Allocator">Allocator</a>, </span></span></code></span></span></span></span></h4></div></summary><divclass="docblock"><p>Returns the Lagrange coefficients for this fixed point.</p>