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  1. <!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="API documentation for the Rust `Signed` trait in crate `num`."><meta name="keywords" content="rust, rustlang, rust-lang, Signed"><title>num::Signed - Rust</title><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="../dark.css"><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script src="../storage.js"></script></head><body class="rustdoc trait"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">&#9776;</div><p class='location'>Trait Signed</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.abs">abs</a><a href="#tymethod.abs_sub">abs_sub</a><a href="#tymethod.signum">signum</a><a href="#tymethod.is_positive">is_positive</a><a href="#tymethod.is_negative">is_negative</a></div><a class="sidebar-title" href="#foreign-impls">Implementations on Foreign Types</a><div class="sidebar-links"><a href="#impl-Signed">i8</a><a href="#impl-Signed">f64</a><a href="#impl-Signed">i64</a><a href="#impl-Signed">Wrapping&lt;T&gt;</a><a href="#impl-Signed">f32</a><a href="#impl-Signed">isize</a><a href="#impl-Signed">i16</a><a href="#impl-Signed">i128</a><a href="#impl-Signed">i32</a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class='location'><a href='index.html'>num</a></p><script>window.sidebarCurrent = {name: 'Signed', ty: 'trait', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><a id="settings-menu" href="../settings.html"><img src="../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='in-band'>Trait <a href='index.html'>num</a>::<wbr><a class="trait" href=''>Signed</a></span><span class='out-of-band'><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>&#x2212;</span>]</a></span><a class='srclink' href='../src/num_traits/sign.rs.html#8-42' title='goto source code'>[src]</a></span></h1><div class="docblock type-decl"><pre class='rust trait'>pub trait Signed: <a class="trait" href="../num/traits/trait.Num.html" title="trait num::traits::Num">Num</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/arith/trait.Neg.html" title="trait core::ops::arith::Neg">Neg</a>&lt;Output = Self&gt; {
    2. 

  2.     fn <a href='#tymethod.abs' class='fnname'>abs</a>(&amp;self) -&gt; Self;
    3. 

  3. <div class='item-spacer'></div>    fn <a href='#tymethod.abs_sub' class='fnname'>abs_sub</a>(&amp;self, other: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>Self) -&gt; Self;
    4. 

  4. <div class='item-spacer'></div>    fn <a href='#tymethod.signum' class='fnname'>signum</a>(&amp;self) -&gt; Self;
    5. 

  5. <div class='item-spacer'></div>    fn <a href='#tymethod.is_positive' class='fnname'>is_positive</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>;
    6. 

  6. <div class='item-spacer'></div>    fn <a href='#tymethod.is_negative' class='fnname'>is_negative</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>;
    7. 

  7. }</pre></div><div class='docblock'><p>Useful functions for signed numbers (i.e. numbers that can be negative).</p>
    8. 

  8. </div>
    9. 

  9.             <h2 id='required-methods' class='small-section-header'>
    10. 

  10.               Required Methods<a href='#required-methods' class='anchor'></a>
    11. 

  11.             </h2>
    12. 

  12.             <div class='methods'>
    13. 

  13.         <h3 id='tymethod.abs' class='method'><span id='abs.v' class='invisible'><code>fn <a href='#tymethod.abs' class='fnname'>abs</a>(&amp;self) -&gt; Self</code></span></h3><div class='docblock'><p>Computes the absolute value.</p>
    14. 

  14. <p>For <code>f32</code> and <code>f64</code>, <code>NaN</code> will be returned if the number is <code>NaN</code>.</p>
    15. 

  15. <p>For signed integers, <code>::MIN</code> will be returned if the number is <code>::MIN</code>.</p>
    16. 

  16. </div><h3 id='tymethod.abs_sub' class='method'><span id='abs_sub.v' class='invisible'><code>fn <a href='#tymethod.abs_sub' class='fnname'>abs_sub</a>(&amp;self, other: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>Self) -&gt; Self</code></span></h3><div class='docblock'><p>The positive difference of two numbers.</p>
    17. 

  17. <p>Returns <code>zero</code> if the number is less than or equal to <code>other</code>, otherwise the difference
    18. 

  18. between <code>self</code> and <code>other</code> is returned.</p>
    19. 

  19. </div><h3 id='tymethod.signum' class='method'><span id='signum.v' class='invisible'><code>fn <a href='#tymethod.signum' class='fnname'>signum</a>(&amp;self) -&gt; Self</code></span></h3><div class='docblock'><p>Returns the sign of the number.</p>
    20. 

  20. <p>For <code>f32</code> and <code>f64</code>:</p>
    21. 

  21. <ul>
    22. 

  22. <li><code>1.0</code> if the number is positive, <code>+0.0</code> or <code>INFINITY</code></li>
    23. 

  23. <li><code>-1.0</code> if the number is negative, <code>-0.0</code> or <code>NEG_INFINITY</code></li>
    24. 

  24. <li><code>NaN</code> if the number is <code>NaN</code></li>
    25. 

  25. </ul>
    26. 

  26. <p>For signed integers:</p>
    27. 

  27. <ul>
    28. 

  28. <li><code>0</code> if the number is zero</li>
    29. 

  29. <li><code>1</code> if the number is positive</li>
    30. 

  30. <li><code>-1</code> if the number is negative</li>
    31. 

  31. </ul>
    32. 

  32. </div><h3 id='tymethod.is_positive' class='method'><span id='is_positive.v' class='invisible'><code>fn <a href='#tymethod.is_positive' class='fnname'>is_positive</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></h3><div class='docblock'><p>Returns true if the number is positive and false if the number is zero or negative.</p>
    33. 

  33. </div><h3 id='tymethod.is_negative' class='method'><span id='is_negative.v' class='invisible'><code>fn <a href='#tymethod.is_negative' class='fnname'>is_negative</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></h3><div class='docblock'><p>Returns true if the number is negative and false if the number is zero or positive.</p>
    34. 

  34. </div></div>
    35. 

  35.                 <h2 id='foreign-impls' class='small-section-header'>
    36. 

  36.                   Implementations on Foreign Types<a href='#foreign-impls' class='anchor'></a>
    37. 

  37.                 </h2>
    38. 

  38.             <h3 id='impl-Signed' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../num/traits/sign/trait.Signed.html" title="trait num::traits::sign::Signed">Signed</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i8.html">i8</a></code><a href='#impl-Signed' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#46-71' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><span class='docblock autohide'><div class='impl-items'><h4 id='method.abs' class="method"><span id='abs.v-1' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.abs' class='fnname'>abs</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i8.html">i8</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#48-50' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.abs_sub' class="method"><span id='abs_sub.v-1' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.abs_sub' class='fnname'>abs_sub</a>(&amp;self, other: &amp;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i8.html">i8</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i8.html">i8</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#53-55' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.signum' class="method"><span id='signum.v-1' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.signum' class='fnname'>signum</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i8.html">i8</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#58-64' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.is_positive' class="method"><span id='is_positive.v-1' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.is_positive' class='fnname'>is_positive</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#67' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.is_negative' class="method"><span id='is_negative.v-1' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.is_negative' class='fnname'>is_negative</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#70' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4></div></span><h3 id='impl-Signed-1' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../num/traits/sign/trait.Signed.html" title="trait num::traits::sign::Signed">Signed</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f64.html">f64</a></code><a href='#impl-Signed-1' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#106-138' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><span class='docblock autohide'><div class='impl-items'><h4 id='method.abs-1' class="method"><span id='abs.v-2' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.abs' class='fnname'>abs</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f64.html">f64</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#109-111' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Computes the absolute value. Returns <code>NAN</code> if the number is <code>NAN</code>.</p>
    39. 

  39. </div><h4 id='method.abs_sub-1' class="method"><span id='abs_sub.v-2' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.abs_sub' class='fnname'>abs_sub</a>(&amp;self, other: &amp;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f64.html">f64</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f64.html">f64</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#117-119' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>The positive difference of two numbers. Returns <code>0.0</code> if the number is
    40. 

  40. less than or equal to <code>other</code>, otherwise the difference between<code>self</code>
    41. 

  41. and <code>other</code> is returned.</p>
    42. 

  42. </div><h4 id='method.signum-1' class="method"><span id='signum.v-2' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.signum' class='fnname'>signum</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f64.html">f64</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#127-129' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><h1 id="returns" class="section-header"><a href="#returns">Returns</a></h1>
    43. 

  43. <ul>
    44. 

  44. <li><code>1.0</code> if the number is positive, <code>+0.0</code> or <code>INFINITY</code></li>
    45. 

  45. <li><code>-1.0</code> if the number is negative, <code>-0.0</code> or <code>NEG_INFINITY</code></li>
    46. 

  46. <li><code>NAN</code> if the number is NaN</li>
    47. 

  47. </ul>
    48. 

  48. </div><h4 id='method.is_positive-1' class="method"><span id='is_positive.v-2' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.is_positive' class='fnname'>is_positive</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#133' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns <code>true</code> if the number is positive, including <code>+0.0</code> and <code>INFINITY</code></p>
    49. 

  49. </div><h4 id='method.is_negative-1' class="method"><span id='is_negative.v-2' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.is_negative' class='fnname'>is_negative</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#137' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns <code>true</code> if the number is negative, including <code>-0.0</code> and <code>NEG_INFINITY</code></p>
    50. 

  50. </div></div></span><h3 id='impl-Signed-2' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../num/traits/sign/trait.Signed.html" title="trait num::traits::sign::Signed">Signed</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i64.html">i64</a></code><a href='#impl-Signed-2' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#46-71' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><span class='docblock autohide'><div class='impl-items'><h4 id='method.abs-2' class="method"><span id='abs.v-3' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.abs' class='fnname'>abs</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i64.html">i64</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#48-50' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.abs_sub-2' class="method"><span id='abs_sub.v-3' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.abs_sub' class='fnname'>abs_sub</a>(&amp;self, other: &amp;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i64.html">i64</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i64.html">i64</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#53-55' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.signum-2' class="method"><span id='signum.v-3' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.signum' class='fnname'>signum</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i64.html">i64</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#58-64' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.is_positive-2' class="method"><span id='is_positive.v-3' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.is_positive' class='fnname'>is_positive</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#67' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.is_negative-2' class="method"><span id='is_negative.v-3' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.is_negative' class='fnname'>is_negative</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#70' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4></div></span><h3 id='impl-Signed-3' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl&lt;T&gt; <a class="trait" href="../num/traits/sign/trait.Signed.html" title="trait num::traits::sign::Signed">Signed</a> 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;T: <a class="trait" href="../num/traits/sign/trait.Signed.html" title="trait num::traits::sign::Signed">Signed</a>,<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="../num/traits/trait.Num.html" title="trait num::traits::Num">Num</a>,<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.Neg.html" title="trait core::ops::arith::Neg">Neg</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;&lt;<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; as <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/arith/trait.Neg.html" title="trait core::ops::arith::Neg">Neg</a>&gt;::<a class="type" href="https://doc.rust-lang.org/nightly/core/ops/arith/trait.Neg.html#associatedtype.Output" title="type core::ops::arith::Neg::Output">Output</a> == <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;,&nbsp;</span></code><a href='#impl-Signed-3' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#80-102' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><span class='docblock autohide'><div class='impl-items'><h4 id='method.abs-3' class="method"><span id='abs.v-4' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.abs' class='fnname'>abs</a>(&amp;self) -&gt; <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;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#83-85' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.abs_sub-3' class="method"><span id='abs_sub.v-4' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.abs_sub' class='fnname'>abs_sub</a>(&amp;self, other: &amp;<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="struct" href="https://doc.rust-lang.org/nightly/core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a>&lt;T&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#88-90' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.signum-3' class="method"><span id='signum.v-4' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.signum' class='fnname'>signum</a>(&amp;self) -&gt; <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;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#93-95' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.is_positive-3' class="method"><span id='is_positive.v-4' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.is_positive' class='fnname'>is_positive</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#98' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.is_negative-3' class="method"><span id='is_negative.v-4' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.is_negative' class='fnname'>is_negative</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#101' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4></div></span><h3 id='impl-Signed-4' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../num/traits/sign/trait.Signed.html" title="trait num::traits::sign::Signed">Signed</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f32.html">f32</a></code><a href='#impl-Signed-4' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#106-138' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><span class='docblock autohide'><div class='impl-items'><h4 id='method.abs-4' class="method"><span id='abs.v-5' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.abs' class='fnname'>abs</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f32.html">f32</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#109-111' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Computes the absolute value. Returns <code>NAN</code> if the number is <code>NAN</code>.</p>
    51. 

  51. </div><h4 id='method.abs_sub-4' class="method"><span id='abs_sub.v-5' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.abs_sub' class='fnname'>abs_sub</a>(&amp;self, other: &amp;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f32.html">f32</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f32.html">f32</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#117-119' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>The positive difference of two numbers. Returns <code>0.0</code> if the number is
    52. 

  52. less than or equal to <code>other</code>, otherwise the difference between<code>self</code>
    53. 

  53. and <code>other</code> is returned.</p>
    54. 

  54. </div><h4 id='method.signum-4' class="method"><span id='signum.v-5' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.signum' class='fnname'>signum</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f32.html">f32</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#127-129' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><h1 id="returns-1" class="section-header"><a href="#returns-1">Returns</a></h1>
    55. 

  55. <ul>
    56. 

  56. <li><code>1.0</code> if the number is positive, <code>+0.0</code> or <code>INFINITY</code></li>
    57. 

  57. <li><code>-1.0</code> if the number is negative, <code>-0.0</code> or <code>NEG_INFINITY</code></li>
    58. 

  58. <li><code>NAN</code> if the number is NaN</li>
    59. 

  59. </ul>
    60. 

  60. </div><h4 id='method.is_positive-4' class="method"><span id='is_positive.v-5' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.is_positive' class='fnname'>is_positive</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#133' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns <code>true</code> if the number is positive, including <code>+0.0</code> and <code>INFINITY</code></p>
    61. 

  61. </div><h4 id='method.is_negative-4' class="method"><span id='is_negative.v-5' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.is_negative' class='fnname'>is_negative</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#137' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns <code>true</code> if the number is negative, including <code>-0.0</code> and <code>NEG_INFINITY</code></p>
    62. 

  62. </div></div></span><h3 id='impl-Signed-5' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../num/traits/sign/trait.Signed.html" title="trait num::traits::sign::Signed">Signed</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.isize.html">isize</a></code><a href='#impl-Signed-5' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#46-71' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><span class='docblock autohide'><div class='impl-items'><h4 id='method.abs-5' class="method"><span id='abs.v-6' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.abs' class='fnname'>abs</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.isize.html">isize</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#48-50' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.abs_sub-5' class="method"><span id='abs_sub.v-6' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.abs_sub' class='fnname'>abs_sub</a>(&amp;self, other: &amp;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.isize.html">isize</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.isize.html">isize</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#53-55' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.signum-5' class="method"><span id='signum.v-6' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.signum' class='fnname'>signum</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.isize.html">isize</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#58-64' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.is_positive-5' class="method"><span id='is_positive.v-6' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.is_positive' class='fnname'>is_positive</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#67' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.is_negative-5' class="method"><span id='is_negative.v-6' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.is_negative' class='fnname'>is_negative</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#70' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4></div></span><h3 id='impl-Signed-6' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../num/traits/sign/trait.Signed.html" title="trait num::traits::sign::Signed">Signed</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i16.html">i16</a></code><a href='#impl-Signed-6' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#46-71' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><span class='docblock autohide'><div class='impl-items'><h4 id='method.abs-6' class="method"><span id='abs.v-7' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.abs' class='fnname'>abs</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i16.html">i16</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#48-50' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.abs_sub-6' class="method"><span id='abs_sub.v-7' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.abs_sub' class='fnname'>abs_sub</a>(&amp;self, other: &amp;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i16.html">i16</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i16.html">i16</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#53-55' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.signum-6' class="method"><span id='signum.v-7' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.signum' class='fnname'>signum</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i16.html">i16</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#58-64' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.is_positive-6' class="method"><span id='is_positive.v-7' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.is_positive' class='fnname'>is_positive</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#67' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.is_negative-6' class="method"><span id='is_negative.v-7' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.is_negative' class='fnname'>is_negative</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#70' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4></div></span><h3 id='impl-Signed-7' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../num/traits/sign/trait.Signed.html" title="trait num::traits::sign::Signed">Signed</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i128.html">i128</a></code><a href='#impl-Signed-7' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#46-71' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><span class='docblock autohide'><div class='impl-items'><h4 id='method.abs-7' class="method"><span id='abs.v-8' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.abs' class='fnname'>abs</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i128.html">i128</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#48-50' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.abs_sub-7' class="method"><span id='abs_sub.v-8' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.abs_sub' class='fnname'>abs_sub</a>(&amp;self, other: &amp;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i128.html">i128</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i128.html">i128</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#53-55' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.signum-7' class="method"><span id='signum.v-8' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.signum' class='fnname'>signum</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i128.html">i128</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#58-64' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.is_positive-7' class="method"><span id='is_positive.v-8' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.is_positive' class='fnname'>is_positive</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#67' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.is_negative-7' class="method"><span id='is_negative.v-8' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.is_negative' class='fnname'>is_negative</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#70' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4></div></span><h3 id='impl-Signed-8' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../num/traits/sign/trait.Signed.html" title="trait num::traits::sign::Signed">Signed</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i32.html">i32</a></code><a href='#impl-Signed-8' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#46-71' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><span class='docblock autohide'><div class='impl-items'><h4 id='method.abs-8' class="method"><span id='abs.v-9' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.abs' class='fnname'>abs</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i32.html">i32</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#48-50' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.abs_sub-8' class="method"><span id='abs_sub.v-9' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.abs_sub' class='fnname'>abs_sub</a>(&amp;self, other: &amp;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i32.html">i32</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i32.html">i32</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#53-55' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.signum-8' class="method"><span id='signum.v-9' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.signum' class='fnname'>signum</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i32.html">i32</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#58-64' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.is_positive-8' class="method"><span id='is_positive.v-9' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.is_positive' class='fnname'>is_positive</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#67' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><h4 id='method.is_negative-8' class="method"><span id='is_negative.v-9' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.is_negative' class='fnname'>is_negative</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/sign.rs.html#70' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4></div></span>
    63. 

  63.         <h2 id='implementors' class='small-section-header'>
    64. 

  64.           Implementors<a href='#implementors' class='anchor'></a>
    65. 

  65.         </h2>
    66. 

  66.         <ul class='item-list' id='implementors-list'>
    67. 

  67.     <li><table class='table-display'><tbody><tr><td><code>impl Signed for <a class="struct" href="../num/bigint/struct.BigInt.html" title="struct num::bigint::BigInt">BigInt</a></code><td><div class='out-of-band'><a class='srclink' href='../src/num_bigint/bigint.rs.html#268-304' title='goto source code'>[src]</a></div></td></tr></tbody></table></li>
    68. 

  68. <li><table class='table-display'><tbody><tr><td><code>impl&lt;T&gt; Signed for <a class="struct" href="../num/rational/struct.Ratio.html" title="struct num::rational::Ratio">Ratio</a>&lt;T&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> + <a class="trait" href="../num/integer/trait.Integer.html" title="trait num::integer::Integer">Integer</a> + <a class="trait" href="../num/traits/sign/trait.Signed.html" title="trait num::traits::sign::Signed">Signed</a>,&nbsp;</span></code><td><div class='out-of-band'><a class='srclink' href='../src/num_rational/lib.rs.html#766-807' title='goto source code'>[src]</a></div></td></tr></tbody></table></li>
    69. 

  69. </ul><script type="text/javascript">window.inlined_types=new Set([]);</script><script type="text/javascript" async
    70. 

  70.                          src="../implementors/num_traits/sign/trait.Signed.js">
    71. 

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    72.