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</head><bodyclass="rustdoc struct"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><navclass="mobile-topbar"><buttonclass="sidebar-menu-toggle">☰</button><aclass="sidebar-logo"href="../../halo2_proofs/index.html"><divclass="logo-container"><imgclass="rust-logo"src="../../static.files/rust-logo-151179464ae7ed46.svg"alt="logo"></div></a><h2></h2></nav><navclass="sidebar"><aclass="sidebar-logo"href="../../halo2_proofs/index.html"><divclass="logo-container"><imgclass="rust-logo"src="../../static.files/rust-logo-151179464ae7ed46.svg"alt="logo"></div></a><h2class="location"><ahref="#">ConstraintSystem</a></h2><divclass="sidebar-elems"><section><h3><ahref="#implementations">Methods</a></h3><ulclass="block"><li><ahref="#method.advice_column">advice_column</a></li><li><ahref="#method.blinding_factors">blinding_factors</a></li><li><ahref="#method.complex_selector">complex_selector</a></li><li><ahref="#method.create_gate">create_gate</a></li><li><ahref="#method.degree">degree</a></li><li><ahref="#method.enable_constant">enable_constant</a></li><li><ahref="#method.enable_equality">enable_equality</a></li><li><ahref="#method.fixed_column">fixed_column</a></li><li><ahref="#method.instance_column">instance_column</a></li><li><ahref="#method.lookup">lookup</a></li><li><ahref="#method.lookup_table_column">lookup_table_column</a></li><li><ahref="#method.minimum_rows">minimum_rows</a></li><li><ahref="#method.pinned">pinned</a></li><li><ahref="#method.selector">selector</a></li><li><ahref="#method.set_minimum_degree">set_minimum_degree</a></li></ul><h3><ahref="#trait-implementations">Trait Implementations</a></h3><ulclass="block"><li><ahref="#impl-Clone-for-ConstraintSystem%3CF%3E">Clone</a></li><li><ahref="#impl-Debug-for-ConstraintSystem%3CF%3E">Debug</a></li><li><ahref="#impl-Default-for-ConstraintSystem%3CF%3E">Default</a></li></ul><h3><ahref="#synthetic-implementations">Auto Trait Implementations</a></h3><ulclass="block"><li><ahref="#impl-RefUnwindSafe-for-ConstraintSystem%3CF%3E">RefUnwindSafe</a></li><li><ahref="#impl-Send-for-ConstraintSystem%3CF%3E">Send</a></li><li><ahref="#impl-Sync-for-ConstraintSystem%3CF%3E">Sync</a></li><li><ahref="#impl-Unpin-for-ConstraintSystem%3CF%3E">Unpin</a></li><li><ahref="#impl-UnwindSafe-for-ConstraintSystem%3CF%3E">UnwindSafe</a></li></ul><h3><ahref="#blanket-implementations">Blanket Implementations</a></h3><ulclass="block"><li><ahref="#impl-Any-for-ConstraintSystem%3CF%3E">Any</a></li><li><ahref="#impl-Borrow%3CT%3E-for-ConstraintSystem%3CF%3E">Borrow<T></a></li><li><ahref="#impl-BorrowMut%3CT%3E-for-ConstraintSystem%3CF%3E">BorrowMut<T></a></li><li><ahref="#impl-Conv-for-ConstraintSystem%3CF%3E">Conv</a></li><li><ahref="#impl-FmtForward-for-ConstraintSystem%3CF%3E">FmtForward</a></li><li><ahref="#impl-From%3CT%3E-for-ConstraintSystem%3CF%3E">From<T></a></li><li><ahref="#impl-Instrument-for-ConstraintSystem%3CF%3E">Instrument</a></li><li><ahref="#impl-Into%3CU%3E-for-ConstraintSystem%3CF%3E">Into<U></a></li><li><ahref="#impl-Pipe-for-ConstraintSystem%3CF%3E">Pipe</a></li><li><ahref="#impl-Pointable-for-ConstraintSystem%3CF%3E">Pointable</a></li><li><ahref="#impl-Tap-for-ConstraintSystem%3CF%3E">Tap</a></li><li><ahref="#impl-ToOwned-for-ConstraintSystem%3CF%3E">ToOwned</a></li><li><ahref="#impl-TryConv-for-ConstraintSystem%3CF%3E">TryConv</a></li><li><ahref="#impl-TryFrom%3CU%3E-for-ConstraintSystem%3CF%3E">TryFrom<U></a></li><li><ahref="#impl-TryInto%3CU%3E-for-ConstraintSystem%3CF%3E">TryInto<U></a></li><li><ahref="#impl-VZip%3CV%3E-for-ConstraintSystem%3CF%3E">VZip<V></a></li><li><ahref="#impl-WithSubscriber-for-ConstraintSystem%3CF%3E">WithSubscriber</a></li></ul></section><h2><ahref="index.html">In halo2_proofs::plonk</a></h2></div></nav><main><divclass="width-limiter"><navclass="sub"><formclass="search-form"><span></span><inputclass="search-input"name="search"autocomplete="off"spellcheck=
</div></details><h2id="implementations"class="small-section-header">Implementations<ahref="#implementations"class="anchor"></a></h2><divid="implementations-list"><detailsclass="rustdoc-toggle implementors-toggle"open><summary><sectionid="impl-ConstraintSystem%3CF%3E"class="impl has-srclink"><aclass="srclink rightside"href="../../src/halo2_proofs/plonk/circuit.rs.html#1017-1472">source</a><ahref="#impl-ConstraintSystem%3CF%3E"class="anchor"></a><h3class="code-header">impl<F: <aclass="trait"href="../arithmetic/trait.Field.html"title="trait halo2_proofs::arithmetic::Field">Field</a>><aclass="struct"href="struct.ConstraintSystem.html"title="struct halo2_proofs::plonk::ConstraintSystem">ConstraintSystem</a><F></h3></section></summary><divclass="impl-items"><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.pinned"class="method has-srclink"><aclass="srclink rightside"href="../../src/halo2_proofs/plonk/circuit.rs.html#1021-1036">source</a><h4class="code-header">pub fn <ahref="#method.pinned"class="fnname">pinned</a>(&self) -><aclass="struct"href="struct.PinnedConstraintSystem.html"title="struct halo2_proofs::plonk::PinnedConstraintSystem">PinnedConstraintSystem</a><'_, F></h4></section></summary><divclass="docblock"><p>Obtain a pinned version of this constraint system; a structure with the
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.enable_constant"class="method has-srclink"><aclass="srclink rightside"href="../../src/halo2_proofs/plonk/circuit.rs.html#1043-1048">source</a><h4class="code-header">pub fn <ahref="#method.enable_constant"class="fnname">enable_constant</a>(&mut self, column: <aclass="struct"href="struct.Column.html"title="struct halo2_proofs::plonk::Column">Column</a><<aclass="struct"href="struct.Fixed.html"title="struct halo2_proofs::plonk::Fixed">Fixed</a>>)</h4></section></summary><divclass="docblock"><p>Enables this fixed column to be used for global constant assignments.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.enable_equality"class="method has-srclink"><aclass="srclink rightside"href="../../src/halo2_proofs/plonk/circuit.rs.html#1051-1055">source</a><h4class="code-header">pub fn <ahref="#method.enable_equality"class="fnname">enable_equality</a><C: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><<aclass="struct"href="struct.Column.html"title="struct halo2_proofs::plonk::Column">Column</a><<aclass="enum"href="enum.Any.html"title="enum halo2_proofs::plonk::Any">Any</a>>>>(&mut self, column: C)</h4></section></summary><divclass="docblock"><p>Enable the ability to enforce equality over cells in this column</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.lookup"class="method has-srclink"><aclass="srclink rightside"href="../../src/halo2_proofs/plonk/circuit.rs.html#1061-1084">source</a><h4class="code-header">pub fn <ahref="#method.lookup"class="fnname">lookup</a>(<br> &mut self,<br> table_map: impl <aclass="trait"href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html"title="trait core::ops::function::FnOnce">FnOnce</a>(&mut <aclass="struct"href="struct.VirtualCells.html"title="struct halo2_proofs::plonk::VirtualCells">VirtualCells</a><'_, F>) -><aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html"title="struct alloc::vec::Vec">Vec</a><(<aclass="enum"href="enum.Expression.html"title="enum halo2_proofs::plonk::Expression">Expression</a><F>, <aclass="struct"href="struct.TableColumn.html"title="struct halo2_proofs::plonk::TableColumn">TableColumn</a>)><br>) -><aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a></h4></section></summary><divclass="docblock"><p>Add a lookup argument for some input expressions and table columns.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.set_minimum_degree"class="method has-srclink"><aclass="srclink rightside"href="../../src/halo2_proofs/plonk/circuit.rs.html#1189-1191">source</a><h4class="code-header">pub fn <ahref="#method.set_minimum_degree"class="fnname">set_minimum_degree</a>(&mut self, degree: <aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</h4></section></summary><divclass="docblock"><p>Sets the minimum degree required by the circuit, which can be set to a
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.selector"class="method has-srclink"><aclass="srclink rightside"href="../../src/halo2_proofs/plonk/circuit.rs.html#1348-1352">source</a><h4class="code-header">pub fn <ahref="#method.selector"class="fnname">selector</a>(&mut self) -><aclass="struct"href="struct.Selector.html"title="struct halo2_proofs::plonk::Selector">Selector</a></h4></section></summary><divclass="docblock"><p>Allocate a new (simple) selector. Simple selectors cannot be added to
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.complex_selector"class="method has-srclink"><aclass="srclink rightside"href="../../src/halo2_proofs/plonk/circuit.rs.html#1356-1360">source</a><h4class="code-header">pub fn <ahref="#method.complex_selector"class="fnname">complex_selector</a>(&mut self) -><aclass="struct"href="struct.Selector.html"title="struct halo2_proofs::plonk::Selector">Selector</a></h4></section></summary><divclass="docblock"><p>Allocate a new complex selector that can appear anywhere
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.lookup_table_column"class="method has-srclink"><aclass="srclink rightside"href="../../src/halo2_proofs/plonk/circuit.rs.html#1363-1367">source</a><h4class="code-header">pub fn <ahref="#method.lookup_table_column"class="fnname">lookup_table_column</a>(&mut self) -><aclass="struct"href="struct.TableColumn.html"title="struct halo2_proofs::plonk::TableColumn">TableColumn</a></h4></section></summary><divclass="docblock"><p>Allocates a new fixed column that can be used in a lookup table.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.fixed_column"class="method has-srclink"><aclass="srclink rightside"href="../../src/halo2_proofs/plonk/circuit.rs.html#1370-1377">source</a><h4class="code-header">pub fn <ahref="#method.fixed_column"class="fnname">fixed_column</a>(&mut self) -><aclass="struct"href="struct.Column.html"title="struct halo2_proofs::plonk::Column">Column</a><<aclass="struct"href="struct.Fixed.html"title="struct halo2_proofs::plonk::Fixed">Fixed</a>></h4></section></summary><divclass="docblock"><p>Allocate a new fixed column</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.advice_column"class="method has-srclink"><aclass="srclink rightside"href="../../src/halo2_proofs/plonk/circuit.rs.html#1380-1388">source</a><h4class="code-header">pub fn <ahref="#method.advice_column"class="fnname">advice_column</a>(&mut self) -><aclass="struct"href="struct.Column.html"title="struct halo2_proofs::plonk::Column">Column</a><<aclass="struct"href="struct.Advice.html"title="struct halo2_proofs::plonk::Advice">Advice</a>></h4></section></summary><divclass="docblock"><p>Allocate a new advice column</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.instance_column"class="method has-srclink"><aclass="srclink rightside"href="../../src/halo2_proofs/plonk/circuit.rs.html#1391-1398">source</a><h4class="code-header">pub fn <ahref="#method.instance_column"class="fnname">instance_column</a>(&mut self) -><aclass="struct"href="struct.Column.html"title="struct halo2_proofs::plonk::Column">Column</a><<aclass="struct"href="struct.Instance.html"title="struct halo2_proofs::plonk::Instance">Instance</a>></h4></section></summary><divclass="docblock"><p>Allocate a new instance column</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.degree"class="method has-srclink"><aclass="srclink rightside"href="../../src/halo2_proofs/plonk/circuit.rs.html#1402-1430">source</a><h4class="code-header">pub fn <ahref="#method.degree"class="fnname">degree</a>(&self) -><aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a></h4></section></summary><divclass="docblock"><p>Compute the degree of the constraint system (the maximum degree of all
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.blinding_factors"class="method has-srclink"><aclass="srclink rightside"href="../../src/halo2_proofs/plonk/circuit.rs.html#1434-1459">source</a><h4class="code-header">pub fn <ahref="#method.blinding_factors"class="fnname">blinding_factors</a>(&self) -><aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a></h4></section></summary><divclass="docblock"><p>Compute the number of blinding factors necessary to perfectly blind
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.minimum_rows"class="method has-srclink"><aclass="srclink rightside"href="../../src/halo2_proofs/plonk/circuit.rs.html#1463-1471">source</a><h4class="code-header">pub fn <ahref="#method.minimum_rows"class="fnname">minimum_rows</a>(&self) -><aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a></h4></section></summary><divclass="docblock"><p>Returns the minimum necessary rows that need to exist in order to
<code>Debug</code>-formatted. <a>Read more</a></div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.fmt_lower_exp"class="method trait-impl has-srclink"><ahref="#method.fmt_lower_exp"class="anchor"></a><h4class="code-header">fn <aclass="fnname">fmt_lower_exp</a>(self) -> FmtLowerExp<Self><spanclass="where fmt-newline">where<br> Self: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/fmt/trait.LowerExp.html"title="trait core::fmt::LowerExp">LowerExp</a>,</span></h4></section></summary><divclass='docblock'>Causes <code>self</code> to use its <code>LowerExp</code> implementation when
<code>Debug</code>-formatted. <a>Read more</a></div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.fmt_lower_hex"class="method trait-impl has-srclink"><ahref="#method.fmt_lower_hex"class="anchor"></a><h4class="code-header">fn <aclass="fnname">fmt_lower_hex</a>(self) -> FmtLowerHex<Self><spanclass="where fmt-newline">where<br> Self: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/fmt/trait.LowerHex.html"title="trait core::fmt::LowerHex">LowerHex</a>,</span></h4></section></summary><divclass='docblock'>Causes <code>self</code> to use its <code>LowerHex</code> implementation when
<code>Debug</code>-formatted. <a>Read more</a></div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.fmt_octal"class="method trait-impl has-srclink"><ahref="#method.fmt_octal"class="anchor"></a><h4class="code-header">fn <aclass="fnname">fmt_octal</a>(self) -> FmtOctal<Self><spanclass="where fmt-newline">where<br> Self: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/fmt/trait.Octal.html"title="trait core::fmt::Octal">Octal</a>,</span></h4></section></summary><divclass='docblock'>Causes <code>self</code> to use its <code>Octal</code> implementation when <code>Debug</code>-formatted.</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.fmt_pointer"class="method trait-impl has-srclink"><ahref="#method.fmt_pointer"class="anchor"></a><h4class="code-header">fn <aclass="fnname">fmt_pointer</a>(self) -> FmtPointer<Self><spanclass="where fmt-newline">where<br> Self: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/fmt/trait.Pointer.html"title="trait core::fmt::Pointer">Pointer</a>,</span></h4></section></summary><divclass='docblock'>Causes <code>self</code> to use its <code>Pointer</code> implementation when
<code>Debug</code>-formatted. <a>Read more</a></div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.fmt_upper_exp"class="method trait-impl has-srclink"><ahref="#method.fmt_upper_exp"class="anchor"></a><h4class="code-header">fn <aclass="fnname">fmt_upper_exp</a>(self) -> FmtUpperExp<Self><spanclass="where fmt-newline">where<br> Self: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/fmt/trait.UpperExp.html"title="trait core::fmt::UpperExp">UpperExp</a>,</span></h4></section></summary><divclass='docblock'>Causes <code>self</code> to use its <code>UpperExp</code> implementation when
<code>Debug</code>-formatted. <a>Read more</a></div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.fmt_upper_hex"class="method trait-impl has-srclink"><ahref="#method.fmt_upper_hex"class="anchor"></a><h4class="code-header">fn <aclass="fnname">fmt_upper_hex</a>(self) -> FmtUpperHex<Self><spanclass="where fmt-newline">where<br> Self: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/fmt/trait.UpperHex.html"title="trait core::fmt::UpperHex">UpperHex</a>,</span></h4></section></summary><divclass='docblock'>Causes <code>self</code> to use its <code>UpperHex</code> implementation when
</div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"><summary><sectionid="impl-Instrument-for-ConstraintSystem%3CF%3E"class="impl has-srclink"><aclass="srclink rightside"href="https://docs.rs/tracing/0.1.37/src/tracing/instrument.rs.html#276">source</a><ahref="#impl-Instrument-for-ConstraintSystem%3CF%3E"class="anchor"></a><h3class="code-header">impl<T><aclass="trait"href="https://docs.rs/tracing/0.1.37/tracing/instrument/trait.Instrument.html"title="trait tracing::instrument::Instrument">Instrument</a> for T</h3></section></summary><divclass="impl-items"><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.instrument"class="method trait-impl has-srclink"><aclass="srclink rightside"href="https://docs.rs/tracing/0.1.37/src/tracing/instrument.rs.html#82">source</a><ahref="#method.instrument"class="anchor"></a><h4class="code-header">fn <ahref="https://docs.rs/tracing/0.1.37/tracing/instrument/trait.Instrument.html#method.instrument"class="fnname">instrument</a>(self, span: <aclass="struct"href="https://docs.rs/tracing/0.1.37/tracing/span/struct.Span.html"title="struct tracing::span::Span">Span</a>) -><aclass="struct"href="https://docs.rs/tracing/0.1.37/tracing/instrument/struct.Instrumented.html"title="struct tracing::instrument::Instrumented">Instrumented</a><Self></h4></section></summary><divclass='docblock'>Instruments this type with the provided <ahref="https://docs.rs/tracing/0.1.37/tracing/span/struct.Span.html"title="Span"><code>Span</code></a>, returning an
<code>Instrumented</code> wrapper. <ahref="https://docs.rs/tracing/0.1.37/tracing/instrument/trait.Instrument.html#method.instrument">Read more</a></div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.in_current_span"class="method trait-impl has-srclink"><aclass="srclink rightside"href="https://docs.rs/tracing/0.1.37/src/tracing/instrument.rs.html#121">source</a><ahref="#method.in_current_span"class="anchor"></a><h4class="code-header">fn <ahref="https://docs.rs/tracing/0.1.37/tracing/instrument/trait.Instrument.html#method.in_current_span"class="fnname">in_current_span</a>(self) -><aclass="struct"href="https://docs.rs/tracing/0.1.37/tracing/instrument/struct.Instrumented.html"title="struct tracing::instrument::Instrumented">Instrumented</a><Self></h4></section></summary><divclass='docblock'>Instruments this type with the <ahref="https://docs.rs/tracing/0.1.37/tracing/span/struct.Span.html#method.current">current</a><ahref="https://docs.rs/tracing/0.1.37/tracing/span/struct.Span.html"><code>Span</code></a>, returning an
function. <a>Read more</a></div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"><summary><sectionid="impl-Pointable-for-ConstraintSystem%3CF%3E"class="impl has-srclink"><ahref="#impl-Pointable-for-ConstraintSystem%3CF%3E"class="anchor"></a><h3class="code-header">impl<T> Pointable for T</h3></section></summary><divclass="impl-items"><detailsclass="rustdoc-toggle"open><summary><sectionid="associatedconstant.ALIGN"class="associatedconstant trait-impl has-srclink"><ahref="#associatedconstant.ALIGN"class="anchor"></a><h4class="code-header">const <aclass="constant">ALIGN</a>: <aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a> = mem::align_of::<T>()</h4></section></summary><divclass='docblock'>The alignment of pointer.</div></details><detailsclass="rustdoc-toggle"open><summary><sectionid="associatedtype.Init"class="associatedtype trait-impl has-srclink"><ahref="#associatedtype.Init"class="anchor"></a><h4class="code-header">type <aclass="associatedtype">Init</a> = T</h4></section></summary><divclass='docblock'>The type for initializers.</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.init"class="method trait-impl has-srclink"><ahref="#method.init"class="anchor"></a><h4class="code-header">unsafe fn <aclass="fnname">init</a>(init: <T as Pointable>::Init) -><aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a></h4></section></summary><divclass='docblock'>Initializes a with the given initializer. <a>Read more</a></div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.deref"class="method trait-impl has-srclink"><ahref="#method.deref"class="anchor"></a><h4class="code-header">unsafe fn <aclass="fnname">deref</a><'a>(ptr: <aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -><aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a </a>T</h4></section></summary><divclass='docblock'>Dereferences the given pointer. <a>Read more</a></div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.deref_mut"class="method trait-impl has-srclink"><ahref="#method.deref_mut"class="anchor"></a><h4class="code-header">unsafe fn <aclass="fnname">deref_mut</a><'a>(ptr: <aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -><aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a mut </a>T</h4></section></summary><divclass='docblock'>Mutably dereferences the given pointer. <a>Read more</a></div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.drop"class="method trait-impl has-srclink"><ahref="#method.drop"class="anchor"></a><h4class="code-header">unsafe fn <aclass="fnname">drop</a>(ptr: <aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</h4></section></summary><divclass='docblock'>Drops the object pointed to by the given pointer. <a>Read more</a></div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"><summary><sectionid="impl-Tap-for-ConstraintSystem%3CF%3E"class="impl has-srclink"><ahref="#impl-Tap-for-ConstraintSystem%3CF%3E"class="anchor"></a><h3class="code-header">impl<T> Tap for T</h3></section></summary><divclass="impl-items"><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.tap"class="method trait-impl has-srclink"><ahref="#method.tap"class="anchor"></a><h4class="code-header">fn <aclass="fnname">tap</a>(self, func: impl <aclass="trait"href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html"title="trait core::ops::function::FnOnce">FnOnce</a>(<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>Self)) -> Self</h4></sectio
<ahref="https://docs.rs/tracing/0.1.37/tracing/instrument/struct.WithDispatch.html"title="WithDispatch"><code>WithDispatch</code></a> wrapper. <ahref="https://docs.rs/tracing/0.1.37/tracing/instrument/trait.WithSubscriber.html#method.with_subscriber">Read more</a></div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.with_current_subscriber"class="method trait-impl has-srclink"><aclass="srclink rightside"href="https://docs.rs/tracing/0.1.37/src/tracing/instrument.rs.html#221">source</a><ahref="#method.with_current_subscriber"class="anchor"></a><h4class="code-header">fn <ahref="https://docs.rs/tracing/0.1.37/tracing/instrument/trait.WithSubscriber.html#method.with_current_subscriber"class="fnname">with_current_subscriber</a>(self) -><aclass="struct"href="https://docs.rs/tracing/0.1.37/tracing/instrument/struct.WithDispatch.html"title="struct tracing::instrument::WithDispatch">WithDispatch</a><Self></h4></section></summary><divclass='docblock'>Attaches the current <ahref="https://docs.rs/tracing/0.1.37/tracing/dispatcher/index.html#setting-the-default-subscriber">default</a><ahref="https://docs.rs/tracing-core/0.1.22/tracing_core/subscriber/trait.Subscriber.html"><code>Subscriber</code></a> to this type, returning a