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<p class='location'>Trait Step</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#required-methods">Required Methods</a><div class="sidebar-links"><a href="#tymethod.steps_between">steps_between</a><a href="#tymethod.replace_one">replace_one</a><a href="#tymethod.replace_zero">replace_zero</a><a href="#tymethod.add_one">add_one</a><a href="#tymethod.sub_one">sub_one</a><a href="#tymethod.add_usize">add_usize</a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class='location'><a href='../index.html'>std</a>::<wbr><a href='index.html'>iter</a></p><script>window.sidebarCurrent = {name: 'Step', ty: 'trait', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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<h1 class='fqn'><span class='in-band'>Trait <a href='../index.html'>std</a>::<wbr><a href='index.html'>iter</a>::<wbr><a class="trait" href=''>Step</a></span><span class='out-of-band'><span class='since' title='Stable since Rust version '></span><span id='render-detail'>
<a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
[<span class='inner'>−</span>]
</a>
</span><a class='srclink' href='../../src/core/iter/range.rs.html#25-47' title='goto source code'>[src]</a></span></h1>
<pre class='rust trait'>pub trait Step: <a class="trait" href="../../std/cmp/trait.PartialOrd.html" title="trait std::cmp::PartialOrd">PartialOrd</a><Self> + <a class="trait" href="../../std/clone/trait.Clone.html" title="trait std::clone::Clone">Clone</a> {
fn <a href='#tymethod.steps_between' class='fnname'>steps_between</a>(start: <a class="primitive" href="../primitive.reference.html">&</a>Self, end: <a class="primitive" href="../primitive.reference.html">&</a>Self) -> <a class="enum" href="../../std/option/enum.Option.html" title="enum std::option::Option">Option</a><<a class="primitive" href="../primitive.usize.html">usize</a>>;
<div class='item-spacer'></div> fn <a href='#tymethod.replace_one' class='fnname'>replace_one</a>(&mut self) -> Self;
<div class='item-spacer'></div> fn <a href='#tymethod.replace_zero' class='fnname'>replace_zero</a>(&mut self) -> Self;
<div class='item-spacer'></div> fn <a href='#tymethod.add_one' class='fnname'>add_one</a>(&self) -> Self;
<div class='item-spacer'></div> fn <a href='#tymethod.sub_one' class='fnname'>sub_one</a>(&self) -> Self;
<div class='item-spacer'></div> fn <a href='#tymethod.add_usize' class='fnname'>add_usize</a>(&self, n: <a class="primitive" href="../primitive.usize.html">usize</a>) -> <a class="enum" href="../../std/option/enum.Option.html" title="enum std::option::Option">Option</a><Self>;
}</pre><div class='stability'><div class='stab unstable'><details><summary><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>step_trait </code><a href="https://github.com/rust-lang/rust/issues/42168">#42168</a>)</summary><p>likely to be replaced by finer-grained traits</p>
</details></div></div><div class='docblock'><p>Objects that can be stepped over in both directions.</p>
<p>The <code>steps_between</code> function provides a way to efficiently compare
two <code>Step</code> objects.</p>
</div>
<h2 id='required-methods' class='small-section-header'>
Required Methods<a href='#required-methods' class='anchor'></a>
</h2>
<div class='methods'>
<h3 id='tymethod.steps_between' class='method'><span id='steps_between.v' class='invisible'><code>fn <a href='#tymethod.steps_between' class='fnname'>steps_between</a>(start: <a class="primitive" href="../primitive.reference.html">&</a>Self, end: <a class="primitive" href="../primitive.reference.html">&</a>Self) -> <a class="enum" href="../../std/option/enum.Option.html" title="enum std::option::Option">Option</a><<a class="primitive" href="../primitive.usize.html">usize</a>></code></span></h3><div class='stability'><div class='stab unstable'><details><summary><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>step_trait </code><a href="https://github.com/rust-lang/rust/issues/42168">#42168</a>)</summary><p>likely to be replaced by finer-grained traits</p>
</details></div></div><div class='docblock'><p>Returns the number of steps between two step objects. The count is
inclusive of <code>start</code> and exclusive of <code>end</code>.</p>
<p>Returns <code>None</code> if it is not possible to calculate <code>steps_between</code>
without overflow.</p>
</div><h3 id='tymethod.replace_one' class='method'><span id='replace_one.v' class='invisible'><code>fn <a href='#tymethod.replace_one' class='fnname'>replace_one</a>(&mut self) -> Self</code></span></h3><div class='stability'><div class='stab unstable'><details><summary><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>step_trait </code><a href="https://github.com/rust-lang/rust/issues/42168">#42168</a>)</summary><p>likely to be replaced by finer-grained traits</p>
</details></div></div><div class='docblock'><p>Replaces this step with <code>1</code>, returning itself</p>
</div><h3 id='tymethod.replace_zero' class='method'><span id='replace_zero.v' class='invisible'><code>fn <a href='#tymethod.replace_zero' class='fnname'>replace_zero</a>(&mut self) -> Self</code></span></h3><div class='stability'><div class='stab unstable'><details><summary><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>step_trait </code><a href="https://github.com/rust-lang/rust/issues/42168">#42168</a>)</summary><p>likely to be replaced by finer-grained traits</p>
</details></div></div><div class='docblock'><p>Replaces this step with <code>0</code>, returning itself</p>
</div><h3 id='tymethod.add_one' class='method'><span id='add_one.v' class='invisible'><code>fn <a href='#tymethod.add_one' class='fnname'>add_one</a>(&self) -> Self</code></span></h3><div class='stability'><div class='stab unstable'><details><summary><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>step_trait </code><a href="https://github.com/rust-lang/rust/issues/42168">#42168</a>)</summary><p>likely to be replaced by finer-grained traits</p>
</details></div></div><div class='docblock'><p>Adds one to this step, returning the result</p>
</div><h3 id='tymethod.sub_one' class='method'><span id='sub_one.v' class='invisible'><code>fn <a href='#tymethod.sub_one' class='fnname'>sub_one</a>(&self) -> Self</code></span></h3><div class='stability'><div class='stab unstable'><details><summary><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>step_trait </code><a href="https://github.com/rust-lang/rust/issues/42168">#42168</a>)</summary><p>likely to be replaced by finer-grained traits</p>
</details></div></div><div class='docblock'><p>Subtracts one to this step, returning the result</p>
</div><h3 id='tymethod.add_usize' class='method'><span id='add_usize.v' class='invisible'><code>fn <a href='#tymethod.add_usize' class='fnname'>add_usize</a>(&self, n: <a class="primitive" href="../primitive.usize.html">usize</a>) -> <a class="enum" href="../../std/option/enum.Option.html" title="enum std::option::Option">Option</a><Self></code></span></h3><div class='stability'><div class='stab unstable'><details><summary><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>step_trait </code><a href="https://github.com/rust-lang/rust/issues/42168">#42168</a>)</summary><p>likely to be replaced by finer-grained traits</p>
</details></div></div><div class='docblock'><p>Add an usize, returning None on overflow</p>
</div></div>
<h2 id='implementors' class='small-section-header'>
Implementors<a href='#implementors' class='anchor'></a>
</h2>
<ul class='item-list' id='implementors-list'>
<li><div class='out-of-band'><a class='srclink' href='../../src/core/iter/range.rs.html#109-143' title='goto source code'>[src]</a></div><code>impl Step for <a class="primitive" href="../primitive.isize.html">isize</a></code></li>
<li><div class='out-of-band'><a class='srclink' href='../../src/core/iter/range.rs.html#109-143' title='goto source code'>[src]</a></div><code>impl Step for <a class="primitive" href="../primitive.i16.html">i16</a></code></li>
<li><div class='out-of-band'><a class='srclink' href='../../src/core/iter/range.rs.html#79-101' title='goto source code'>[src]</a></div><code>impl Step for <a class="primitive" href="../primitive.u32.html">u32</a></code></li>
<li><div class='out-of-band'><a class='srclink' href='../../src/core/iter/range.rs.html#109-143' title='goto source code'>[src]</a></div><code>impl Step for <a class="primitive" href="../primitive.i64.html">i64</a></code></li>
<li><div class='out-of-band'><a class='srclink' href='../../src/core/iter/range.rs.html#152-164' title='goto source code'>[src]</a></div><code>impl Step for <a class="primitive" href="../primitive.i128.html">i128</a></code></li>
<li><div class='out-of-band'><a class='srclink' href='../../src/core/iter/range.rs.html#79-101' title='goto source code'>[src]</a></div><code>impl Step for <a class="primitive" href="../primitive.u8.html">u8</a></code></li>
<li><div class='out-of-band'><a class='srclink' href='../../src/core/iter/range.rs.html#79-101' title='goto source code'>[src]</a></div><code>impl Step for <a class="primitive" href="../primitive.usize.html">usize</a></code></li>
<li><div class='out-of-band'><a class='srclink' href='../../src/core/iter/range.rs.html#109-143' title='goto source code'>[src]</a></div><code>impl Step for <a class="primitive" href="../primitive.i32.html">i32</a></code></li>
<li><div class='out-of-band'><a class='srclink' href='../../src/core/iter/range.rs.html#79-101' title='goto source code'>[src]</a></div><code>impl Step for <a class="primitive" href="../primitive.u64.html">u64</a></code></li>
<li><div class='out-of-band'><a class='srclink' href='../../src/core/iter/range.rs.html#152-164' title='goto source code'>[src]</a></div><code>impl Step for <a class="primitive" href="../primitive.u128.html">u128</a></code></li>
<li><div class='out-of-band'><a class='srclink' href='../../src/core/iter/range.rs.html#109-143' title='goto source code'>[src]</a></div><code>impl Step for <a class="primitive" href="../primitive.i8.html">i8</a></code></li>
<li><div class='out-of-band'><a class='srclink' href='../../src/core/iter/range.rs.html#79-101' title='goto source code'>[src]</a></div><code>impl Step for <a class="primitive" href="../primitive.u16.html">u16</a></code></li>
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