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2017-07-14 23:30:16 +00:00
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<p class='location'>Trait Num</p><div class="block items"><ul><li><a href="#associated-types">Associated Types</a></li><li><a href="#required-methods">Required Methods</a></li><li><a href="#implementors">Implementors</a></li></ul></div><p class='location'><a href='index.html'>num_traits</a></p><script>window.sidebarCurrent = {name: 'Num', ty: 'trait', relpath: ''};</script><script defer src="sidebar-items.js"></script>
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<h1 class='fqn'><span class='in-band'>Trait <a href='index.html'>num_traits</a>::<wbr><a class="trait" href=''>Num</a></span><span class='out-of-band'><span id='render-detail'>
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[<span class='inner'>&#x2212;</span>]
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</span><a class='srclink' href='../src/num_traits/lib.rs.html#43-61' title='goto source code'>[src]</a></span></h1>
<pre class='rust trait'>pub trait Num: <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a> + <a class="trait" href="../num_traits/identities/trait.Zero.html" title="trait num_traits::identities::Zero">Zero</a> + <a class="trait" href="../num_traits/identities/trait.One.html" title="trait num_traits::identities::One">One</a> + <a class="trait" href="../num_traits/trait.NumOps.html" title="trait num_traits::NumOps">NumOps</a> {
type <a href='#associatedtype.FromStrRadixErr' class="type">FromStrRadixErr</a>;
fn <a href='#tymethod.from_str_radix' class='fnname'>from_str_radix</a>(<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;str: &amp;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;radix: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a><br>&nbsp;&nbsp;&nbsp;&nbsp;) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;Self, Self::<a class="type" href="../num_traits/trait.Num.html#associatedtype.FromStrRadixErr" title="type num_traits::Num::FromStrRadixErr">FromStrRadixErr</a>&gt;;
}</pre><div class='docblock'><p>The base trait for numeric types, covering <code>0</code> and <code>1</code> values,
comparisons, basic numeric operations, and string conversion.</p>
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<h2 id='associated-types'>Associated Types</h2>
<div class='methods'>
<h3 id='associatedtype.FromStrRadixErr' class='method'><span id='FromStrRadixErr.t' class='invisible'><code>type <a href='#associatedtype.FromStrRadixErr' class="type">FromStrRadixErr</a></code></span></h3></div>
<h2 id='required-methods'>Required Methods</h2>
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<h3 id='tymethod.from_str_radix' class='method'><span id='from_str_radix.v' class='invisible'><code>fn <a href='#tymethod.from_str_radix' class='fnname'>from_str_radix</a>(str: &amp;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, radix: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;Self, Self::<a class="type" href="../num_traits/trait.Num.html#associatedtype.FromStrRadixErr" title="type num_traits::Num::FromStrRadixErr">FromStrRadixErr</a>&gt;</code></span></h3><div class='docblock'><p>Convert from a string and radix &lt;= 36.</p>
<h1 id='examples' class='section-header'><a href='#examples'>Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">num_traits</span>::<span class="ident">Num</span>;
<span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="op">&lt;</span><span class="ident">i32</span> <span class="kw">as</span> <span class="ident">Num</span><span class="op">&gt;</span>::<span class="ident">from_str_radix</span>(<span class="string">&quot;27&quot;</span>, <span class="number">10</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">result</span>, <span class="prelude-val">Ok</span>(<span class="number">27</span>));
<span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="op">&lt;</span><span class="ident">i32</span> <span class="kw">as</span> <span class="ident">Num</span><span class="op">&gt;</span>::<span class="ident">from_str_radix</span>(<span class="string">&quot;foo&quot;</span>, <span class="number">10</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">result</span>.<span class="ident">is_err</span>());<a class="test-arrow" target="_blank" href="http://play.integer32.com/?code=extern%20crate%20num_traits%3B%0Afn%20main()%20%7B%0Ause%20num_traits%3A%3ANum%3B%0A%0Alet%20result%20%3D%20%3Ci32%20as%20Num%3E%3A%3Afrom_str_radix(%2227%22%2C%2010)%3B%0Aassert_eq!(result%2C%20Ok(27))%3B%0A%0Alet%20result%20%3D%20%3Ci32%20as%20Num%3E%3A%3Afrom_str_radix(%22foo%22%2C%2010)%3B%0Aassert!(result.is_err())%3B%0A%7D">Run</a></pre>
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<h2 id='implementors'>Implementors</h2>
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<li><code>impl Num for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a></code></li>
<li><code>impl Num for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a></code></li>
<li><code>impl Num for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u16.html">u16</a></code></li>
<li><code>impl Num for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a></code></li>
<li><code>impl Num for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a></code></li>
<li><code>impl Num for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.isize.html">isize</a></code></li>
<li><code>impl Num for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i8.html">i8</a></code></li>
<li><code>impl Num for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i16.html">i16</a></code></li>
<li><code>impl Num for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i32.html">i32</a></code></li>
<li><code>impl Num for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i64.html">i64</a></code></li>
<li><code>impl&lt;T:&nbsp;<a class="trait" href="../num_traits/trait.Num.html" title="trait num_traits::Num">Num</a>&gt; Num for <a class="struct" href="https://doc.rust-lang.org/nightly/core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a>&lt;T&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;<a class="struct" href="https://doc.rust-lang.org/nightly/core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a>&lt;T&gt;: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/arith/trait.Add.html" title="trait core::ops::arith::Add">Add</a>&lt;Output = <a class="struct" href="https://doc.rust-lang.org/nightly/core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a>&lt;T&gt;&gt; + <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/arith/trait.Sub.html" title="trait core::ops::arith::Sub">Sub</a>&lt;Output = <a class="struct" href="https://doc.rust-lang.org/nightly/core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a>&lt;T&gt;&gt; + <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/arith/trait.Mul.html" title="trait core::ops::arith::Mul">Mul</a>&lt;Output = <a class="struct" href="https://doc.rust-lang.org/nightly/core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a>&lt;T&gt;&gt; + <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/arith/trait.Div.html" title="trait core::ops::arith::Div">Div</a>&lt;Output = <a class="struct" href="https://doc.rust-lang.org/nightly/core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a>&lt;T&gt;&gt; + <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/arith/trait.Rem.html" title="trait core::ops::arith::Rem">Rem</a>&lt;Output = <a class="struct" href="https://doc.rust-lang.org/nightly/core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a>&lt;T&gt;&gt;,&nbsp;</span></code></li>
<li><code>impl Num for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f32.html">f32</a></code></li>
<li><code>impl Num for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f64.html">f64</a></code></li>
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