1147 lines
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1147 lines
93 KiB
HTML
<!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="Source to the Rust file `/Users/sambuc/.cargo/registry/src/github.com-1ecc6299db9ec823/num-traits-0.2.11/src/lib.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>lib.rs.html -- source</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><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="shortcut icon" href="../../favicon.ico"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc source"><!--[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">☰</div><a href='../../num_traits/index.html'><div class='logo-container'><img src='../../rust-logo.png' alt='logo'></div></a></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"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><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"><pre class="line-numbers"><span id="1"> 1</span>
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<span id="421">421</span>
|
||
<span id="422">422</span>
|
||
<span id="423">423</span>
|
||
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|
||
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|
||
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|
||
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|
||
<span id="428">428</span>
|
||
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|
||
<span id="430">430</span>
|
||
<span id="431">431</span>
|
||
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|
||
<span id="433">433</span>
|
||
<span id="434">434</span>
|
||
<span id="435">435</span>
|
||
<span id="436">436</span>
|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
<span id="445">445</span>
|
||
<span id="446">446</span>
|
||
<span id="447">447</span>
|
||
<span id="448">448</span>
|
||
<span id="449">449</span>
|
||
<span id="450">450</span>
|
||
<span id="451">451</span>
|
||
<span id="452">452</span>
|
||
<span id="453">453</span>
|
||
<span id="454">454</span>
|
||
<span id="455">455</span>
|
||
<span id="456">456</span>
|
||
<span id="457">457</span>
|
||
<span id="458">458</span>
|
||
<span id="459">459</span>
|
||
<span id="460">460</span>
|
||
<span id="461">461</span>
|
||
<span id="462">462</span>
|
||
<span id="463">463</span>
|
||
<span id="464">464</span>
|
||
<span id="465">465</span>
|
||
<span id="466">466</span>
|
||
<span id="467">467</span>
|
||
<span id="468">468</span>
|
||
<span id="469">469</span>
|
||
<span id="470">470</span>
|
||
<span id="471">471</span>
|
||
<span id="472">472</span>
|
||
<span id="473">473</span>
|
||
<span id="474">474</span>
|
||
<span id="475">475</span>
|
||
<span id="476">476</span>
|
||
<span id="477">477</span>
|
||
<span id="478">478</span>
|
||
<span id="479">479</span>
|
||
<span id="480">480</span>
|
||
<span id="481">481</span>
|
||
<span id="482">482</span>
|
||
<span id="483">483</span>
|
||
<span id="484">484</span>
|
||
<span id="485">485</span>
|
||
<span id="486">486</span>
|
||
<span id="487">487</span>
|
||
<span id="488">488</span>
|
||
<span id="489">489</span>
|
||
<span id="490">490</span>
|
||
<span id="491">491</span>
|
||
<span id="492">492</span>
|
||
<span id="493">493</span>
|
||
<span id="494">494</span>
|
||
<span id="495">495</span>
|
||
<span id="496">496</span>
|
||
<span id="497">497</span>
|
||
<span id="498">498</span>
|
||
<span id="499">499</span>
|
||
<span id="500">500</span>
|
||
<span id="501">501</span>
|
||
<span id="502">502</span>
|
||
<span id="503">503</span>
|
||
<span id="504">504</span>
|
||
<span id="505">505</span>
|
||
<span id="506">506</span>
|
||
<span id="507">507</span>
|
||
<span id="508">508</span>
|
||
<span id="509">509</span>
|
||
<span id="510">510</span>
|
||
<span id="511">511</span>
|
||
<span id="512">512</span>
|
||
<span id="513">513</span>
|
||
<span id="514">514</span>
|
||
<span id="515">515</span>
|
||
<span id="516">516</span>
|
||
<span id="517">517</span>
|
||
<span id="518">518</span>
|
||
<span id="519">519</span>
|
||
<span id="520">520</span>
|
||
<span id="521">521</span>
|
||
<span id="522">522</span>
|
||
<span id="523">523</span>
|
||
<span id="524">524</span>
|
||
<span id="525">525</span>
|
||
<span id="526">526</span>
|
||
<span id="527">527</span>
|
||
<span id="528">528</span>
|
||
<span id="529">529</span>
|
||
<span id="530">530</span>
|
||
<span id="531">531</span>
|
||
<span id="532">532</span>
|
||
<span id="533">533</span>
|
||
<span id="534">534</span>
|
||
<span id="535">535</span>
|
||
<span id="536">536</span>
|
||
<span id="537">537</span>
|
||
<span id="538">538</span>
|
||
<span id="539">539</span>
|
||
<span id="540">540</span>
|
||
<span id="541">541</span>
|
||
<span id="542">542</span>
|
||
<span id="543">543</span>
|
||
<span id="544">544</span>
|
||
<span id="545">545</span>
|
||
<span id="546">546</span>
|
||
<span id="547">547</span>
|
||
<span id="548">548</span>
|
||
<span id="549">549</span>
|
||
<span id="550">550</span>
|
||
<span id="551">551</span>
|
||
<span id="552">552</span>
|
||
<span id="553">553</span>
|
||
<span id="554">554</span>
|
||
<span id="555">555</span>
|
||
<span id="556">556</span>
|
||
<span id="557">557</span>
|
||
<span id="558">558</span>
|
||
<span id="559">559</span>
|
||
<span id="560">560</span>
|
||
<span id="561">561</span>
|
||
<span id="562">562</span>
|
||
<span id="563">563</span>
|
||
<span id="564">564</span>
|
||
<span id="565">565</span>
|
||
<span id="566">566</span>
|
||
<span id="567">567</span>
|
||
<span id="568">568</span>
|
||
<span id="569">569</span>
|
||
<span id="570">570</span>
|
||
<span id="571">571</span>
|
||
<span id="572">572</span>
|
||
</pre><div class="example-wrap"><pre class="rust ">
|
||
<span class="comment">// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT</span>
|
||
<span class="comment">// file at the top-level directory of this distribution and at</span>
|
||
<span class="comment">// http://rust-lang.org/COPYRIGHT.</span>
|
||
<span class="comment">//</span>
|
||
<span class="comment">// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or</span>
|
||
<span class="comment">// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span>
|
||
<span class="comment">// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your</span>
|
||
<span class="comment">// option. This file may not be copied, modified, or distributed</span>
|
||
<span class="comment">// except according to those terms.</span>
|
||
|
||
<span class="doccomment">//! Numeric traits for generic mathematics</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! ## Compatibility</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! The `num-traits` crate is tested for rustc 1.8 and greater.</span>
|
||
|
||
<span class="attribute">#![<span class="ident">doc</span>(<span class="ident">html_root_url</span> <span class="op">=</span> <span class="string">"https://docs.rs/num-traits/0.2"</span>)]</span>
|
||
<span class="attribute">#![<span class="ident">deny</span>(<span class="ident">unconditional_recursion</span>)]</span>
|
||
<span class="attribute">#![<span class="ident">no_std</span>]</span>
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>)]</span>
|
||
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">std</span>;
|
||
|
||
<span class="comment">// Only `no_std` builds actually use `libm`.</span>
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">all</span>(<span class="ident">not</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>), <span class="ident">feature</span> <span class="op">=</span> <span class="string">"libm"</span>))]</span>
|
||
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">libm</span>;
|
||
|
||
<span class="kw">use</span> <span class="ident">core</span>::<span class="ident">fmt</span>;
|
||
<span class="kw">use</span> <span class="ident">core</span>::<span class="ident">num</span>::<span class="ident">Wrapping</span>;
|
||
<span class="kw">use</span> <span class="ident">core</span>::<span class="ident">ops</span>::{<span class="ident">Add</span>, <span class="ident">Div</span>, <span class="ident">Mul</span>, <span class="ident">Rem</span>, <span class="ident">Sub</span>};
|
||
<span class="kw">use</span> <span class="ident">core</span>::<span class="ident">ops</span>::{<span class="ident">AddAssign</span>, <span class="ident">DivAssign</span>, <span class="ident">MulAssign</span>, <span class="ident">RemAssign</span>, <span class="ident">SubAssign</span>};
|
||
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">bounds</span>::<span class="ident">Bounded</span>;
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>, <span class="ident">feature</span> <span class="op">=</span> <span class="string">"libm"</span>))]</span>
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">float</span>::<span class="ident">Float</span>;
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">float</span>::<span class="ident">FloatConst</span>;
|
||
<span class="comment">// pub use real::{FloatCore, Real}; // NOTE: Don't do this, it breaks `use num_traits::*;`.</span>
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">cast</span>::{<span class="ident">cast</span>, <span class="ident">AsPrimitive</span>, <span class="ident">FromPrimitive</span>, <span class="ident">NumCast</span>, <span class="ident">ToPrimitive</span>};
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">identities</span>::{<span class="ident">one</span>, <span class="ident">zero</span>, <span class="ident">One</span>, <span class="ident">Zero</span>};
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">int</span>::<span class="ident">PrimInt</span>;
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">ops</span>::<span class="ident">checked</span>::{
|
||
<span class="ident">CheckedAdd</span>, <span class="ident">CheckedDiv</span>, <span class="ident">CheckedMul</span>, <span class="ident">CheckedNeg</span>, <span class="ident">CheckedRem</span>, <span class="ident">CheckedShl</span>, <span class="ident">CheckedShr</span>, <span class="ident">CheckedSub</span>,
|
||
};
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">ops</span>::<span class="ident">inv</span>::<span class="ident">Inv</span>;
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">ops</span>::<span class="ident">mul_add</span>::{<span class="ident">MulAdd</span>, <span class="ident">MulAddAssign</span>};
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">ops</span>::<span class="ident">saturating</span>::<span class="ident">Saturating</span>;
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">ops</span>::<span class="ident">wrapping</span>::{<span class="ident">WrappingAdd</span>, <span class="ident">WrappingMul</span>, <span class="ident">WrappingShl</span>, <span class="ident">WrappingShr</span>, <span class="ident">WrappingSub</span>};
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">pow</span>::{<span class="ident">checked_pow</span>, <span class="ident">pow</span>, <span class="ident">Pow</span>};
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">sign</span>::{<span class="ident">abs</span>, <span class="ident">abs_sub</span>, <span class="ident">signum</span>, <span class="ident">Signed</span>, <span class="ident">Unsigned</span>};
|
||
|
||
<span class="attribute">#[<span class="ident">macro_use</span>]</span>
|
||
<span class="kw">mod</span> <span class="ident">macros</span>;
|
||
|
||
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">bounds</span>;
|
||
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">cast</span>;
|
||
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">float</span>;
|
||
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">identities</span>;
|
||
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">int</span>;
|
||
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">ops</span>;
|
||
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">pow</span>;
|
||
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">real</span>;
|
||
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">sign</span>;
|
||
|
||
<span class="doccomment">/// The base trait for numeric types, covering `0` and `1` values,</span>
|
||
<span class="doccomment">/// comparisons, basic numeric operations, and string conversion.</span>
|
||
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">Num</span>: <span class="ident">PartialEq</span> <span class="op">+</span> <span class="ident">Zero</span> <span class="op">+</span> <span class="ident">One</span> <span class="op">+</span> <span class="ident">NumOps</span> {
|
||
<span class="kw">type</span> <span class="ident">FromStrRadixErr</span>;
|
||
|
||
<span class="doccomment">/// Convert from a string and radix <= 36.</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// # Examples</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// ```rust</span>
|
||
<span class="doccomment">/// use num_traits::Num;</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// let result = <i32 as Num>::from_str_radix("27", 10);</span>
|
||
<span class="doccomment">/// assert_eq!(result, Ok(27));</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// let result = <i32 as Num>::from_str_radix("foo", 10);</span>
|
||
<span class="doccomment">/// assert!(result.is_err());</span>
|
||
<span class="doccomment">/// ```</span>
|
||
<span class="kw">fn</span> <span class="ident">from_str_radix</span>(<span class="ident">str</span>: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">radix</span>: <span class="ident">u32</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span>, <span class="self">Self</span>::<span class="ident">FromStrRadixErr</span><span class="op">></span>;
|
||
}
|
||
|
||
<span class="doccomment">/// The trait for types implementing basic numeric operations</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// This is automatically implemented for types which implement the operators.</span>
|
||
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">NumOps</span><span class="op"><</span><span class="ident">Rhs</span> <span class="op">=</span> <span class="self">Self</span>, <span class="ident">Output</span> <span class="op">=</span> <span class="self">Self</span><span class="op">></span>:
|
||
<span class="ident">Add</span><span class="op"><</span><span class="ident">Rhs</span>, <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Output</span><span class="op">></span>
|
||
<span class="op">+</span> <span class="ident">Sub</span><span class="op"><</span><span class="ident">Rhs</span>, <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Output</span><span class="op">></span>
|
||
<span class="op">+</span> <span class="ident">Mul</span><span class="op"><</span><span class="ident">Rhs</span>, <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Output</span><span class="op">></span>
|
||
<span class="op">+</span> <span class="ident">Div</span><span class="op"><</span><span class="ident">Rhs</span>, <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Output</span><span class="op">></span>
|
||
<span class="op">+</span> <span class="ident">Rem</span><span class="op"><</span><span class="ident">Rhs</span>, <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Output</span><span class="op">></span>
|
||
{
|
||
}
|
||
|
||
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">Rhs</span>, <span class="ident">Output</span><span class="op">></span> <span class="ident">NumOps</span><span class="op"><</span><span class="ident">Rhs</span>, <span class="ident">Output</span><span class="op">></span> <span class="kw">for</span> <span class="ident">T</span> <span class="kw">where</span>
|
||
<span class="ident">T</span>: <span class="ident">Add</span><span class="op"><</span><span class="ident">Rhs</span>, <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Output</span><span class="op">></span>
|
||
<span class="op">+</span> <span class="ident">Sub</span><span class="op"><</span><span class="ident">Rhs</span>, <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Output</span><span class="op">></span>
|
||
<span class="op">+</span> <span class="ident">Mul</span><span class="op"><</span><span class="ident">Rhs</span>, <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Output</span><span class="op">></span>
|
||
<span class="op">+</span> <span class="ident">Div</span><span class="op"><</span><span class="ident">Rhs</span>, <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Output</span><span class="op">></span>
|
||
<span class="op">+</span> <span class="ident">Rem</span><span class="op"><</span><span class="ident">Rhs</span>, <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Output</span><span class="op">></span>
|
||
{
|
||
}
|
||
|
||
<span class="doccomment">/// The trait for `Num` types which also implement numeric operations taking</span>
|
||
<span class="doccomment">/// the second operand by reference.</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// This is automatically implemented for types which implement the operators.</span>
|
||
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">NumRef</span>: <span class="ident">Num</span> <span class="op">+</span> <span class="kw">for</span><span class="op"><</span><span class="lifetime">'r</span><span class="op">></span> <span class="ident">NumOps</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'r</span> <span class="self">Self</span><span class="op">></span> {}
|
||
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">NumRef</span> <span class="kw">for</span> <span class="ident">T</span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">Num</span> <span class="op">+</span> <span class="kw">for</span><span class="op"><</span><span class="lifetime">'r</span><span class="op">></span> <span class="ident">NumOps</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'r</span> <span class="ident">T</span><span class="op">></span> {}
|
||
|
||
<span class="doccomment">/// The trait for references which implement numeric operations, taking the</span>
|
||
<span class="doccomment">/// second operand either by value or by reference.</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// This is automatically implemented for types which implement the operators.</span>
|
||
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">RefNum</span><span class="op"><</span><span class="ident">Base</span><span class="op">></span>: <span class="ident">NumOps</span><span class="op"><</span><span class="ident">Base</span>, <span class="ident">Base</span><span class="op">></span> <span class="op">+</span> <span class="kw">for</span><span class="op"><</span><span class="lifetime">'r</span><span class="op">></span> <span class="ident">NumOps</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'r</span> <span class="ident">Base</span>, <span class="ident">Base</span><span class="op">></span> {}
|
||
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">Base</span><span class="op">></span> <span class="ident">RefNum</span><span class="op"><</span><span class="ident">Base</span><span class="op">></span> <span class="kw">for</span> <span class="ident">T</span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">NumOps</span><span class="op"><</span><span class="ident">Base</span>, <span class="ident">Base</span><span class="op">></span> <span class="op">+</span> <span class="kw">for</span><span class="op"><</span><span class="lifetime">'r</span><span class="op">></span> <span class="ident">NumOps</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'r</span> <span class="ident">Base</span>, <span class="ident">Base</span><span class="op">></span> {}
|
||
|
||
<span class="doccomment">/// The trait for types implementing numeric assignment operators (like `+=`).</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// This is automatically implemented for types which implement the operators.</span>
|
||
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">NumAssignOps</span><span class="op"><</span><span class="ident">Rhs</span> <span class="op">=</span> <span class="self">Self</span><span class="op">></span>:
|
||
<span class="ident">AddAssign</span><span class="op"><</span><span class="ident">Rhs</span><span class="op">></span> <span class="op">+</span> <span class="ident">SubAssign</span><span class="op"><</span><span class="ident">Rhs</span><span class="op">></span> <span class="op">+</span> <span class="ident">MulAssign</span><span class="op"><</span><span class="ident">Rhs</span><span class="op">></span> <span class="op">+</span> <span class="ident">DivAssign</span><span class="op"><</span><span class="ident">Rhs</span><span class="op">></span> <span class="op">+</span> <span class="ident">RemAssign</span><span class="op"><</span><span class="ident">Rhs</span><span class="op">></span>
|
||
{
|
||
}
|
||
|
||
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">Rhs</span><span class="op">></span> <span class="ident">NumAssignOps</span><span class="op"><</span><span class="ident">Rhs</span><span class="op">></span> <span class="kw">for</span> <span class="ident">T</span> <span class="kw">where</span>
|
||
<span class="ident">T</span>: <span class="ident">AddAssign</span><span class="op"><</span><span class="ident">Rhs</span><span class="op">></span> <span class="op">+</span> <span class="ident">SubAssign</span><span class="op"><</span><span class="ident">Rhs</span><span class="op">></span> <span class="op">+</span> <span class="ident">MulAssign</span><span class="op"><</span><span class="ident">Rhs</span><span class="op">></span> <span class="op">+</span> <span class="ident">DivAssign</span><span class="op"><</span><span class="ident">Rhs</span><span class="op">></span> <span class="op">+</span> <span class="ident">RemAssign</span><span class="op"><</span><span class="ident">Rhs</span><span class="op">></span>
|
||
{
|
||
}
|
||
|
||
<span class="doccomment">/// The trait for `Num` types which also implement assignment operators.</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// This is automatically implemented for types which implement the operators.</span>
|
||
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">NumAssign</span>: <span class="ident">Num</span> <span class="op">+</span> <span class="ident">NumAssignOps</span> {}
|
||
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">NumAssign</span> <span class="kw">for</span> <span class="ident">T</span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">Num</span> <span class="op">+</span> <span class="ident">NumAssignOps</span> {}
|
||
|
||
<span class="doccomment">/// The trait for `NumAssign` types which also implement assignment operations</span>
|
||
<span class="doccomment">/// taking the second operand by reference.</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// This is automatically implemented for types which implement the operators.</span>
|
||
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">NumAssignRef</span>: <span class="ident">NumAssign</span> <span class="op">+</span> <span class="kw">for</span><span class="op"><</span><span class="lifetime">'r</span><span class="op">></span> <span class="ident">NumAssignOps</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'r</span> <span class="self">Self</span><span class="op">></span> {}
|
||
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">NumAssignRef</span> <span class="kw">for</span> <span class="ident">T</span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">NumAssign</span> <span class="op">+</span> <span class="kw">for</span><span class="op"><</span><span class="lifetime">'r</span><span class="op">></span> <span class="ident">NumAssignOps</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'r</span> <span class="ident">T</span><span class="op">></span> {}
|
||
|
||
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">int_trait_impl</span> {
|
||
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> <span class="kw">for</span> $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">ty</span>)<span class="kw-2">*</span>) <span class="op">=</span><span class="op">></span> ($(
|
||
<span class="kw">impl</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span> {
|
||
<span class="kw">type</span> <span class="ident">FromStrRadixErr</span> <span class="op">=</span> ::<span class="ident">core</span>::<span class="ident">num</span>::<span class="ident">ParseIntError</span>;
|
||
<span class="attribute">#[<span class="ident">inline</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">from_str_radix</span>(<span class="ident">s</span>: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">radix</span>: <span class="ident">u32</span>)
|
||
<span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span>, ::<span class="ident">core</span>::<span class="ident">num</span>::<span class="ident">ParseIntError</span><span class="op">></span>
|
||
{
|
||
<span class="op"><</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span><span class="op">></span>::<span class="ident">from_str_radix</span>(<span class="ident">s</span>, <span class="ident">radix</span>)
|
||
}
|
||
}
|
||
)<span class="kw-2">*</span>)
|
||
}
|
||
<span class="macro">int_trait_impl</span><span class="macro">!</span>(<span class="ident">Num</span> <span class="kw">for</span> <span class="ident">usize</span> <span class="ident">u8</span> <span class="ident">u16</span> <span class="ident">u32</span> <span class="ident">u64</span> <span class="ident">isize</span> <span class="ident">i8</span> <span class="ident">i16</span> <span class="ident">i32</span> <span class="ident">i64</span>);
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">has_i128</span>)]</span>
|
||
<span class="macro">int_trait_impl</span><span class="macro">!</span>(<span class="ident">Num</span> <span class="kw">for</span> <span class="ident">u128</span> <span class="ident">i128</span>);
|
||
|
||
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Num</span><span class="op">></span> <span class="ident">Num</span> <span class="kw">for</span> <span class="ident">Wrapping</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>
|
||
<span class="kw">where</span>
|
||
<span class="ident">Wrapping</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>: <span class="ident">Add</span><span class="op"><</span><span class="ident">Output</span> <span class="op">=</span> <span class="ident">Wrapping</span><span class="op"><</span><span class="ident">T</span><span class="op">></span><span class="op">></span>
|
||
<span class="op">+</span> <span class="ident">Sub</span><span class="op"><</span><span class="ident">Output</span> <span class="op">=</span> <span class="ident">Wrapping</span><span class="op"><</span><span class="ident">T</span><span class="op">></span><span class="op">></span>
|
||
<span class="op">+</span> <span class="ident">Mul</span><span class="op"><</span><span class="ident">Output</span> <span class="op">=</span> <span class="ident">Wrapping</span><span class="op"><</span><span class="ident">T</span><span class="op">></span><span class="op">></span>
|
||
<span class="op">+</span> <span class="ident">Div</span><span class="op"><</span><span class="ident">Output</span> <span class="op">=</span> <span class="ident">Wrapping</span><span class="op"><</span><span class="ident">T</span><span class="op">></span><span class="op">></span>
|
||
<span class="op">+</span> <span class="ident">Rem</span><span class="op"><</span><span class="ident">Output</span> <span class="op">=</span> <span class="ident">Wrapping</span><span class="op"><</span><span class="ident">T</span><span class="op">></span><span class="op">></span>,
|
||
{
|
||
<span class="kw">type</span> <span class="ident">FromStrRadixErr</span> <span class="op">=</span> <span class="ident">T</span>::<span class="ident">FromStrRadixErr</span>;
|
||
<span class="kw">fn</span> <span class="ident">from_str_radix</span>(<span class="ident">str</span>: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">radix</span>: <span class="ident">u32</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span>, <span class="self">Self</span>::<span class="ident">FromStrRadixErr</span><span class="op">></span> {
|
||
<span class="ident">T</span>::<span class="ident">from_str_radix</span>(<span class="ident">str</span>, <span class="ident">radix</span>).<span class="ident">map</span>(<span class="ident">Wrapping</span>)
|
||
}
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span>
|
||
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">FloatErrorKind</span> {
|
||
<span class="ident">Empty</span>,
|
||
<span class="ident">Invalid</span>,
|
||
}
|
||
<span class="comment">// FIXME: core::num::ParseFloatError is stable in 1.0, but opaque to us,</span>
|
||
<span class="comment">// so there's not really any way for us to reuse it.</span>
|
||
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span>
|
||
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">ParseFloatError</span> {
|
||
<span class="kw">pub</span> <span class="ident">kind</span>: <span class="ident">FloatErrorKind</span>,
|
||
}
|
||
|
||
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">ParseFloatError</span> {
|
||
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-</span><span class="op">></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
|
||
<span class="kw">let</span> <span class="ident">description</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">kind</span> {
|
||
<span class="ident">FloatErrorKind</span>::<span class="ident">Empty</span> <span class="op">=</span><span class="op">></span> <span class="string">"cannot parse float from empty string"</span>,
|
||
<span class="ident">FloatErrorKind</span>::<span class="ident">Invalid</span> <span class="op">=</span><span class="op">></span> <span class="string">"invalid float literal"</span>,
|
||
};
|
||
|
||
<span class="ident">description</span>.<span class="ident">fmt</span>(<span class="ident">f</span>)
|
||
}
|
||
}
|
||
|
||
<span class="comment">// FIXME: The standard library from_str_radix on floats was deprecated, so we're stuck</span>
|
||
<span class="comment">// with this implementation ourselves until we want to make a breaking change.</span>
|
||
<span class="comment">// (would have to drop it from `Num` though)</span>
|
||
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">float_trait_impl</span> {
|
||
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> <span class="kw">for</span> $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">ident</span>)<span class="kw-2">*</span>) <span class="op">=</span><span class="op">></span> ($(
|
||
<span class="kw">impl</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span> {
|
||
<span class="kw">type</span> <span class="ident">FromStrRadixErr</span> <span class="op">=</span> <span class="ident">ParseFloatError</span>;
|
||
|
||
<span class="kw">fn</span> <span class="ident">from_str_radix</span>(<span class="ident">src</span>: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">radix</span>: <span class="ident">u32</span>)
|
||
<span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span>, <span class="self">Self</span>::<span class="ident">FromStrRadixErr</span><span class="op">></span>
|
||
{
|
||
<span class="kw">use</span> <span class="self">self</span>::<span class="ident">FloatErrorKind</span>::<span class="kw-2">*</span>;
|
||
<span class="kw">use</span> <span class="self">self</span>::<span class="ident">ParseFloatError</span> <span class="kw">as</span> <span class="ident">PFE</span>;
|
||
|
||
<span class="comment">// Special values</span>
|
||
<span class="kw">match</span> <span class="ident">src</span> {
|
||
<span class="string">"inf"</span> <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">core</span>::<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>::<span class="ident">INFINITY</span>),
|
||
<span class="string">"-inf"</span> <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">core</span>::<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>::<span class="ident">NEG_INFINITY</span>),
|
||
<span class="string">"NaN"</span> <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">core</span>::<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>::<span class="ident">NAN</span>),
|
||
<span class="kw">_</span> <span class="op">=</span><span class="op">></span> {},
|
||
}
|
||
|
||
<span class="kw">fn</span> <span class="ident">slice_shift_char</span>(<span class="ident">src</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Option</span><span class="op"><</span>(<span class="ident">char</span>, <span class="kw-2">&</span><span class="ident">str</span>)<span class="op">></span> {
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">chars</span> <span class="op">=</span> <span class="ident">src</span>.<span class="ident">chars</span>();
|
||
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">ch</span>) <span class="op">=</span> <span class="ident">chars</span>.<span class="ident">next</span>() {
|
||
<span class="prelude-val">Some</span>((<span class="ident">ch</span>, <span class="ident">chars</span>.<span class="ident">as_str</span>()))
|
||
} <span class="kw">else</span> {
|
||
<span class="prelude-val">None</span>
|
||
}
|
||
}
|
||
|
||
<span class="kw">let</span> (<span class="ident">is_positive</span>, <span class="ident">src</span>) <span class="op">=</span> <span class="kw">match</span> <span class="ident">slice_shift_char</span>(<span class="ident">src</span>) {
|
||
<span class="prelude-val">None</span> <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">PFE</span> { <span class="ident">kind</span>: <span class="ident">Empty</span> }),
|
||
<span class="prelude-val">Some</span>((<span class="string">'-'</span>, <span class="string">""</span>)) <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">PFE</span> { <span class="ident">kind</span>: <span class="ident">Empty</span> }),
|
||
<span class="prelude-val">Some</span>((<span class="string">'-'</span>, <span class="ident">src</span>)) <span class="op">=</span><span class="op">></span> (<span class="bool-val">false</span>, <span class="ident">src</span>),
|
||
<span class="prelude-val">Some</span>((<span class="kw">_</span>, <span class="kw">_</span>)) <span class="op">=</span><span class="op">></span> (<span class="bool-val">true</span>, <span class="ident">src</span>),
|
||
};
|
||
|
||
<span class="comment">// The significand to accumulate</span>
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">sig</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">is_positive</span> { <span class="number">0.0</span> } <span class="kw">else</span> { <span class="op">-</span><span class="number">0.0</span> };
|
||
<span class="comment">// Necessary to detect overflow</span>
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">prev_sig</span> <span class="op">=</span> <span class="ident">sig</span>;
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">cs</span> <span class="op">=</span> <span class="ident">src</span>.<span class="ident">chars</span>().<span class="ident">enumerate</span>();
|
||
<span class="comment">// Exponent prefix and exponent index offset</span>
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">exp_info</span> <span class="op">=</span> <span class="prelude-val">None</span>::<span class="op"><</span>(<span class="ident">char</span>, <span class="ident">usize</span>)<span class="op">></span>;
|
||
|
||
<span class="comment">// Parse the integer part of the significand</span>
|
||
<span class="kw">for</span> (<span class="ident">i</span>, <span class="ident">c</span>) <span class="kw">in</span> <span class="ident">cs</span>.<span class="ident">by_ref</span>() {
|
||
<span class="kw">match</span> <span class="ident">c</span>.<span class="ident">to_digit</span>(<span class="ident">radix</span>) {
|
||
<span class="prelude-val">Some</span>(<span class="ident">digit</span>) <span class="op">=</span><span class="op">></span> {
|
||
<span class="comment">// shift significand one digit left</span>
|
||
<span class="ident">sig</span> <span class="op">=</span> <span class="ident">sig</span> <span class="op">*</span> (<span class="ident">radix</span> <span class="kw">as</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>);
|
||
|
||
<span class="comment">// add/subtract current digit depending on sign</span>
|
||
<span class="kw">if</span> <span class="ident">is_positive</span> {
|
||
<span class="ident">sig</span> <span class="op">=</span> <span class="ident">sig</span> <span class="op">+</span> ((<span class="ident">digit</span> <span class="kw">as</span> <span class="ident">isize</span>) <span class="kw">as</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>);
|
||
} <span class="kw">else</span> {
|
||
<span class="ident">sig</span> <span class="op">=</span> <span class="ident">sig</span> <span class="op">-</span> ((<span class="ident">digit</span> <span class="kw">as</span> <span class="ident">isize</span>) <span class="kw">as</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>);
|
||
}
|
||
|
||
<span class="comment">// Detect overflow by comparing to last value, except</span>
|
||
<span class="comment">// if we've not seen any non-zero digits.</span>
|
||
<span class="kw">if</span> <span class="ident">prev_sig</span> <span class="op">!</span><span class="op">=</span> <span class="number">0.0</span> {
|
||
<span class="kw">if</span> <span class="ident">is_positive</span> <span class="kw-2">&</span><span class="op">&</span> <span class="ident">sig</span> <span class="op"><</span><span class="op">=</span> <span class="ident">prev_sig</span>
|
||
{ <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">core</span>::<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>::<span class="ident">INFINITY</span>); }
|
||
<span class="kw">if</span> <span class="op">!</span><span class="ident">is_positive</span> <span class="kw-2">&</span><span class="op">&</span> <span class="ident">sig</span> <span class="op">></span><span class="op">=</span> <span class="ident">prev_sig</span>
|
||
{ <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">core</span>::<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>::<span class="ident">NEG_INFINITY</span>); }
|
||
|
||
<span class="comment">// Detect overflow by reversing the shift-and-add process</span>
|
||
<span class="kw">if</span> <span class="ident">is_positive</span> <span class="kw-2">&</span><span class="op">&</span> (<span class="ident">prev_sig</span> <span class="op">!</span><span class="op">=</span> (<span class="ident">sig</span> <span class="op">-</span> <span class="ident">digit</span> <span class="kw">as</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>) <span class="op">/</span> <span class="ident">radix</span> <span class="kw">as</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>)
|
||
{ <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">core</span>::<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>::<span class="ident">INFINITY</span>); }
|
||
<span class="kw">if</span> <span class="op">!</span><span class="ident">is_positive</span> <span class="kw-2">&</span><span class="op">&</span> (<span class="ident">prev_sig</span> <span class="op">!</span><span class="op">=</span> (<span class="ident">sig</span> <span class="op">+</span> <span class="ident">digit</span> <span class="kw">as</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>) <span class="op">/</span> <span class="ident">radix</span> <span class="kw">as</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>)
|
||
{ <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">core</span>::<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>::<span class="ident">NEG_INFINITY</span>); }
|
||
}
|
||
<span class="ident">prev_sig</span> <span class="op">=</span> <span class="ident">sig</span>;
|
||
},
|
||
<span class="prelude-val">None</span> <span class="op">=</span><span class="op">></span> <span class="kw">match</span> <span class="ident">c</span> {
|
||
<span class="string">'e'</span> <span class="op">|</span> <span class="string">'E'</span> <span class="op">|</span> <span class="string">'p'</span> <span class="op">|</span> <span class="string">'P'</span> <span class="op">=</span><span class="op">></span> {
|
||
<span class="ident">exp_info</span> <span class="op">=</span> <span class="prelude-val">Some</span>((<span class="ident">c</span>, <span class="ident">i</span> <span class="op">+</span> <span class="number">1</span>));
|
||
<span class="kw">break</span>; <span class="comment">// start of exponent</span>
|
||
},
|
||
<span class="string">'.'</span> <span class="op">=</span><span class="op">></span> {
|
||
<span class="kw">break</span>; <span class="comment">// start of fractional part</span>
|
||
},
|
||
<span class="kw">_</span> <span class="op">=</span><span class="op">></span> {
|
||
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">PFE</span> { <span class="ident">kind</span>: <span class="ident">Invalid</span> });
|
||
},
|
||
},
|
||
}
|
||
}
|
||
|
||
<span class="comment">// If we are not yet at the exponent parse the fractional</span>
|
||
<span class="comment">// part of the significand</span>
|
||
<span class="kw">if</span> <span class="ident">exp_info</span>.<span class="ident">is_none</span>() {
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">power</span> <span class="op">=</span> <span class="number">1.0</span>;
|
||
<span class="kw">for</span> (<span class="ident">i</span>, <span class="ident">c</span>) <span class="kw">in</span> <span class="ident">cs</span>.<span class="ident">by_ref</span>() {
|
||
<span class="kw">match</span> <span class="ident">c</span>.<span class="ident">to_digit</span>(<span class="ident">radix</span>) {
|
||
<span class="prelude-val">Some</span>(<span class="ident">digit</span>) <span class="op">=</span><span class="op">></span> {
|
||
<span class="comment">// Decrease power one order of magnitude</span>
|
||
<span class="ident">power</span> <span class="op">=</span> <span class="ident">power</span> <span class="op">/</span> (<span class="ident">radix</span> <span class="kw">as</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>);
|
||
<span class="comment">// add/subtract current digit depending on sign</span>
|
||
<span class="ident">sig</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">is_positive</span> {
|
||
<span class="ident">sig</span> <span class="op">+</span> (<span class="ident">digit</span> <span class="kw">as</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>) <span class="op">*</span> <span class="ident">power</span>
|
||
} <span class="kw">else</span> {
|
||
<span class="ident">sig</span> <span class="op">-</span> (<span class="ident">digit</span> <span class="kw">as</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>) <span class="op">*</span> <span class="ident">power</span>
|
||
};
|
||
<span class="comment">// Detect overflow by comparing to last value</span>
|
||
<span class="kw">if</span> <span class="ident">is_positive</span> <span class="kw-2">&</span><span class="op">&</span> <span class="ident">sig</span> <span class="op"><</span> <span class="ident">prev_sig</span>
|
||
{ <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">core</span>::<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>::<span class="ident">INFINITY</span>); }
|
||
<span class="kw">if</span> <span class="op">!</span><span class="ident">is_positive</span> <span class="kw-2">&</span><span class="op">&</span> <span class="ident">sig</span> <span class="op">></span> <span class="ident">prev_sig</span>
|
||
{ <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">core</span>::<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>::<span class="ident">NEG_INFINITY</span>); }
|
||
<span class="ident">prev_sig</span> <span class="op">=</span> <span class="ident">sig</span>;
|
||
},
|
||
<span class="prelude-val">None</span> <span class="op">=</span><span class="op">></span> <span class="kw">match</span> <span class="ident">c</span> {
|
||
<span class="string">'e'</span> <span class="op">|</span> <span class="string">'E'</span> <span class="op">|</span> <span class="string">'p'</span> <span class="op">|</span> <span class="string">'P'</span> <span class="op">=</span><span class="op">></span> {
|
||
<span class="ident">exp_info</span> <span class="op">=</span> <span class="prelude-val">Some</span>((<span class="ident">c</span>, <span class="ident">i</span> <span class="op">+</span> <span class="number">1</span>));
|
||
<span class="kw">break</span>; <span class="comment">// start of exponent</span>
|
||
},
|
||
<span class="kw">_</span> <span class="op">=</span><span class="op">></span> {
|
||
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">PFE</span> { <span class="ident">kind</span>: <span class="ident">Invalid</span> });
|
||
},
|
||
},
|
||
}
|
||
}
|
||
}
|
||
|
||
<span class="comment">// Parse and calculate the exponent</span>
|
||
<span class="kw">let</span> <span class="ident">exp</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">exp_info</span> {
|
||
<span class="prelude-val">Some</span>((<span class="ident">c</span>, <span class="ident">offset</span>)) <span class="op">=</span><span class="op">></span> {
|
||
<span class="kw">let</span> <span class="ident">base</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">c</span> {
|
||
<span class="string">'E'</span> <span class="op">|</span> <span class="string">'e'</span> <span class="kw">if</span> <span class="ident">radix</span> <span class="op">=</span><span class="op">=</span> <span class="number">10</span> <span class="op">=</span><span class="op">></span> <span class="number">10.0</span>,
|
||
<span class="string">'P'</span> <span class="op">|</span> <span class="string">'p'</span> <span class="kw">if</span> <span class="ident">radix</span> <span class="op">=</span><span class="op">=</span> <span class="number">16</span> <span class="op">=</span><span class="op">></span> <span class="number">2.0</span>,
|
||
<span class="kw">_</span> <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">PFE</span> { <span class="ident">kind</span>: <span class="ident">Invalid</span> }),
|
||
};
|
||
|
||
<span class="comment">// Parse the exponent as decimal integer</span>
|
||
<span class="kw">let</span> <span class="ident">src</span> <span class="op">=</span> <span class="kw-2">&</span><span class="ident">src</span>[<span class="ident">offset</span>..];
|
||
<span class="kw">let</span> (<span class="ident">is_positive</span>, <span class="ident">exp</span>) <span class="op">=</span> <span class="kw">match</span> <span class="ident">slice_shift_char</span>(<span class="ident">src</span>) {
|
||
<span class="prelude-val">Some</span>((<span class="string">'-'</span>, <span class="ident">src</span>)) <span class="op">=</span><span class="op">></span> (<span class="bool-val">false</span>, <span class="ident">src</span>.<span class="ident">parse</span>::<span class="op"><</span><span class="ident">usize</span><span class="op">></span>()),
|
||
<span class="prelude-val">Some</span>((<span class="string">'+'</span>, <span class="ident">src</span>)) <span class="op">=</span><span class="op">></span> (<span class="bool-val">true</span>, <span class="ident">src</span>.<span class="ident">parse</span>::<span class="op"><</span><span class="ident">usize</span><span class="op">></span>()),
|
||
<span class="prelude-val">Some</span>((<span class="kw">_</span>, <span class="kw">_</span>)) <span class="op">=</span><span class="op">></span> (<span class="bool-val">true</span>, <span class="ident">src</span>.<span class="ident">parse</span>::<span class="op"><</span><span class="ident">usize</span><span class="op">></span>()),
|
||
<span class="prelude-val">None</span> <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">PFE</span> { <span class="ident">kind</span>: <span class="ident">Invalid</span> }),
|
||
};
|
||
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>)]</span>
|
||
<span class="kw">fn</span> <span class="ident">pow</span>(<span class="ident">base</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>, <span class="ident">exp</span>: <span class="ident">usize</span>) <span class="op">-</span><span class="op">></span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span> {
|
||
<span class="ident">Float</span>::<span class="ident">powi</span>(<span class="ident">base</span>, <span class="ident">exp</span> <span class="kw">as</span> <span class="ident">i32</span>)
|
||
}
|
||
<span class="comment">// otherwise uses the generic `pow` from the root</span>
|
||
|
||
<span class="kw">match</span> (<span class="ident">is_positive</span>, <span class="ident">exp</span>) {
|
||
(<span class="bool-val">true</span>, <span class="prelude-val">Ok</span>(<span class="ident">exp</span>)) <span class="op">=</span><span class="op">></span> <span class="ident">pow</span>(<span class="ident">base</span>, <span class="ident">exp</span>),
|
||
(<span class="bool-val">false</span>, <span class="prelude-val">Ok</span>(<span class="ident">exp</span>)) <span class="op">=</span><span class="op">></span> <span class="number">1.0</span> <span class="op">/</span> <span class="ident">pow</span>(<span class="ident">base</span>, <span class="ident">exp</span>),
|
||
(<span class="kw">_</span>, <span class="prelude-val">Err</span>(<span class="kw">_</span>)) <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">PFE</span> { <span class="ident">kind</span>: <span class="ident">Invalid</span> }),
|
||
}
|
||
},
|
||
<span class="prelude-val">None</span> <span class="op">=</span><span class="op">></span> <span class="number">1.0</span>, <span class="comment">// no exponent</span>
|
||
};
|
||
|
||
<span class="prelude-val">Ok</span>(<span class="ident">sig</span> <span class="op">*</span> <span class="ident">exp</span>)
|
||
}
|
||
}
|
||
)<span class="kw-2">*</span>)
|
||
}
|
||
<span class="macro">float_trait_impl</span><span class="macro">!</span>(<span class="ident">Num</span> <span class="kw">for</span> <span class="ident">f32</span> <span class="ident">f64</span>);
|
||
|
||
<span class="doccomment">/// A value bounded by a minimum and a maximum</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// If input is less than min then this returns min.</span>
|
||
<span class="doccomment">/// If input is greater than max then this returns max.</span>
|
||
<span class="doccomment">/// Otherwise this returns input.</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// **Panics** in debug mode if `!(min <= max)`.</span>
|
||
<span class="attribute">#[<span class="ident">inline</span>]</span>
|
||
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">clamp</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">PartialOrd</span><span class="op">></span>(<span class="ident">input</span>: <span class="ident">T</span>, <span class="ident">min</span>: <span class="ident">T</span>, <span class="ident">max</span>: <span class="ident">T</span>) <span class="op">-</span><span class="op">></span> <span class="ident">T</span> {
|
||
<span class="macro">debug_assert</span><span class="macro">!</span>(<span class="ident">min</span> <span class="op"><</span><span class="op">=</span> <span class="ident">max</span>, <span class="string">"min must be less than or equal to max"</span>);
|
||
<span class="kw">if</span> <span class="ident">input</span> <span class="op"><</span> <span class="ident">min</span> {
|
||
<span class="ident">min</span>
|
||
} <span class="kw">else</span> <span class="kw">if</span> <span class="ident">input</span> <span class="op">></span> <span class="ident">max</span> {
|
||
<span class="ident">max</span>
|
||
} <span class="kw">else</span> {
|
||
<span class="ident">input</span>
|
||
}
|
||
}
|
||
|
||
<span class="doccomment">/// A value bounded by a minimum value</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// If input is less than min then this returns min.</span>
|
||
<span class="doccomment">/// Otherwise this returns input.</span>
|
||
<span class="doccomment">/// `clamp_min(std::f32::NAN, 1.0)` preserves `NAN` different from `f32::min(std::f32::NAN, 1.0)`.</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// **Panics** in debug mode if `!(min == min)`. (This occurs if `min` is `NAN`.)</span>
|
||
<span class="attribute">#[<span class="ident">inline</span>]</span>
|
||
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">clamp_min</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">PartialOrd</span><span class="op">></span>(<span class="ident">input</span>: <span class="ident">T</span>, <span class="ident">min</span>: <span class="ident">T</span>) <span class="op">-</span><span class="op">></span> <span class="ident">T</span> {
|
||
<span class="macro">debug_assert</span><span class="macro">!</span>(<span class="ident">min</span> <span class="op">=</span><span class="op">=</span> <span class="ident">min</span>, <span class="string">"min must not be NAN"</span>);
|
||
<span class="kw">if</span> <span class="ident">input</span> <span class="op"><</span> <span class="ident">min</span> {
|
||
<span class="ident">min</span>
|
||
} <span class="kw">else</span> {
|
||
<span class="ident">input</span>
|
||
}
|
||
}
|
||
|
||
<span class="doccomment">/// A value bounded by a maximum value</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// If input is greater than max then this returns max.</span>
|
||
<span class="doccomment">/// Otherwise this returns input.</span>
|
||
<span class="doccomment">/// `clamp_max(std::f32::NAN, 1.0)` preserves `NAN` different from `f32::max(std::f32::NAN, 1.0)`.</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// **Panics** in debug mode if `!(max == max)`. (This occurs if `max` is `NAN`.)</span>
|
||
<span class="attribute">#[<span class="ident">inline</span>]</span>
|
||
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">clamp_max</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">PartialOrd</span><span class="op">></span>(<span class="ident">input</span>: <span class="ident">T</span>, <span class="ident">max</span>: <span class="ident">T</span>) <span class="op">-</span><span class="op">></span> <span class="ident">T</span> {
|
||
<span class="macro">debug_assert</span><span class="macro">!</span>(<span class="ident">max</span> <span class="op">=</span><span class="op">=</span> <span class="ident">max</span>, <span class="string">"max must not be NAN"</span>);
|
||
<span class="kw">if</span> <span class="ident">input</span> <span class="op">></span> <span class="ident">max</span> {
|
||
<span class="ident">max</span>
|
||
} <span class="kw">else</span> {
|
||
<span class="ident">input</span>
|
||
}
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">clamp_test</span>() {
|
||
<span class="comment">// Int test</span>
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">1</span>, <span class="ident">clamp</span>(<span class="number">1</span>, <span class="op">-</span><span class="number">1</span>, <span class="number">2</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="op">-</span><span class="number">1</span>, <span class="ident">clamp</span>(<span class="op">-</span><span class="number">2</span>, <span class="op">-</span><span class="number">1</span>, <span class="number">2</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">2</span>, <span class="ident">clamp</span>(<span class="number">3</span>, <span class="op">-</span><span class="number">1</span>, <span class="number">2</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">1</span>, <span class="ident">clamp_min</span>(<span class="number">1</span>, <span class="op">-</span><span class="number">1</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="op">-</span><span class="number">1</span>, <span class="ident">clamp_min</span>(<span class="op">-</span><span class="number">2</span>, <span class="op">-</span><span class="number">1</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="op">-</span><span class="number">1</span>, <span class="ident">clamp_max</span>(<span class="number">1</span>, <span class="op">-</span><span class="number">1</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="op">-</span><span class="number">2</span>, <span class="ident">clamp_max</span>(<span class="op">-</span><span class="number">2</span>, <span class="op">-</span><span class="number">1</span>));
|
||
|
||
<span class="comment">// Float test</span>
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">1.0</span>, <span class="ident">clamp</span>(<span class="number">1.0</span>, <span class="op">-</span><span class="number">1.0</span>, <span class="number">2.0</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="op">-</span><span class="number">1.0</span>, <span class="ident">clamp</span>(<span class="op">-</span><span class="number">2.0</span>, <span class="op">-</span><span class="number">1.0</span>, <span class="number">2.0</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">2.0</span>, <span class="ident">clamp</span>(<span class="number">3.0</span>, <span class="op">-</span><span class="number">1.0</span>, <span class="number">2.0</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">1.0</span>, <span class="ident">clamp_min</span>(<span class="number">1.0</span>, <span class="op">-</span><span class="number">1.0</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="op">-</span><span class="number">1.0</span>, <span class="ident">clamp_min</span>(<span class="op">-</span><span class="number">2.0</span>, <span class="op">-</span><span class="number">1.0</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="op">-</span><span class="number">1.0</span>, <span class="ident">clamp_max</span>(<span class="number">1.0</span>, <span class="op">-</span><span class="number">1.0</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="op">-</span><span class="number">2.0</span>, <span class="ident">clamp_max</span>(<span class="op">-</span><span class="number">2.0</span>, <span class="op">-</span><span class="number">1.0</span>));
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">clamp</span>(::<span class="ident">core</span>::<span class="ident">f32</span>::<span class="ident">NAN</span>, <span class="op">-</span><span class="number">1.0</span>, <span class="number">1.0</span>).<span class="ident">is_nan</span>());
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">clamp_min</span>(::<span class="ident">core</span>::<span class="ident">f32</span>::<span class="ident">NAN</span>, <span class="number">1.0</span>).<span class="ident">is_nan</span>());
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">clamp_max</span>(::<span class="ident">core</span>::<span class="ident">f32</span>::<span class="ident">NAN</span>, <span class="number">1.0</span>).<span class="ident">is_nan</span>());
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="attribute">#[<span class="ident">should_panic</span>]</span>
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">debug_assertions</span>)]</span>
|
||
<span class="kw">fn</span> <span class="ident">clamp_nan_min</span>() {
|
||
<span class="ident">clamp</span>(<span class="number">0.</span>, ::<span class="ident">core</span>::<span class="ident">f32</span>::<span class="ident">NAN</span>, <span class="number">1.</span>);
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="attribute">#[<span class="ident">should_panic</span>]</span>
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">debug_assertions</span>)]</span>
|
||
<span class="kw">fn</span> <span class="ident">clamp_nan_max</span>() {
|
||
<span class="ident">clamp</span>(<span class="number">0.</span>, <span class="op">-</span><span class="number">1.</span>, ::<span class="ident">core</span>::<span class="ident">f32</span>::<span class="ident">NAN</span>);
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="attribute">#[<span class="ident">should_panic</span>]</span>
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">debug_assertions</span>)]</span>
|
||
<span class="kw">fn</span> <span class="ident">clamp_nan_min_max</span>() {
|
||
<span class="ident">clamp</span>(<span class="number">0.</span>, ::<span class="ident">core</span>::<span class="ident">f32</span>::<span class="ident">NAN</span>, ::<span class="ident">core</span>::<span class="ident">f32</span>::<span class="ident">NAN</span>);
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="attribute">#[<span class="ident">should_panic</span>]</span>
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">debug_assertions</span>)]</span>
|
||
<span class="kw">fn</span> <span class="ident">clamp_min_nan_min</span>() {
|
||
<span class="ident">clamp_min</span>(<span class="number">0.</span>, ::<span class="ident">core</span>::<span class="ident">f32</span>::<span class="ident">NAN</span>);
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="attribute">#[<span class="ident">should_panic</span>]</span>
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">debug_assertions</span>)]</span>
|
||
<span class="kw">fn</span> <span class="ident">clamp_max_nan_max</span>() {
|
||
<span class="ident">clamp_max</span>(<span class="number">0.</span>, ::<span class="ident">core</span>::<span class="ident">f32</span>::<span class="ident">NAN</span>);
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">from_str_radix_unwrap</span>() {
|
||
<span class="comment">// The Result error must impl Debug to allow unwrap()</span>
|
||
|
||
<span class="kw">let</span> <span class="ident">i</span>: <span class="ident">i32</span> <span class="op">=</span> <span class="ident">Num</span>::<span class="ident">from_str_radix</span>(<span class="string">"0"</span>, <span class="number">10</span>).<span class="ident">unwrap</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">i</span>, <span class="number">0</span>);
|
||
|
||
<span class="kw">let</span> <span class="ident">f</span>: <span class="ident">f32</span> <span class="op">=</span> <span class="ident">Num</span>::<span class="ident">from_str_radix</span>(<span class="string">"0.0"</span>, <span class="number">10</span>).<span class="ident">unwrap</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="number">0.0</span>);
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">from_str_radix_multi_byte_fail</span>() {
|
||
<span class="comment">// Ensure parsing doesn't panic, even on invalid sign characters</span>
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">f32</span>::<span class="ident">from_str_radix</span>(<span class="string">"™0.2"</span>, <span class="number">10</span>).<span class="ident">is_err</span>());
|
||
|
||
<span class="comment">// Even when parsing the exponent sign</span>
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">f32</span>::<span class="ident">from_str_radix</span>(<span class="string">"0.2E™1"</span>, <span class="number">10</span>).<span class="ident">is_err</span>());
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">wrapping_is_num</span>() {
|
||
<span class="kw">fn</span> <span class="ident">require_num</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Num</span><span class="op">></span>(<span class="kw">_</span>: <span class="kw-2">&</span><span class="ident">T</span>) {}
|
||
<span class="ident">require_num</span>(<span class="kw-2">&</span><span class="ident">Wrapping</span>(<span class="number">42_u32</span>));
|
||
<span class="ident">require_num</span>(<span class="kw-2">&</span><span class="ident">Wrapping</span>(<span class="op">-</span><span class="number">42</span>));
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">wrapping_from_str_radix</span>() {
|
||
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">test_wrapping_from_str_radix</span> {
|
||
($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">ty</span>)<span class="op">+</span>) <span class="op">=</span><span class="op">></span> {
|
||
$(
|
||
<span class="kw">for</span> <span class="kw-2">&</span>(<span class="ident">s</span>, <span class="ident">r</span>) <span class="kw">in</span> <span class="kw-2">&</span>[(<span class="string">"42"</span>, <span class="number">10</span>), (<span class="string">"42"</span>, <span class="number">2</span>), (<span class="string">"-13.0"</span>, <span class="number">10</span>), (<span class="string">"foo"</span>, <span class="number">10</span>)] {
|
||
<span class="kw">let</span> <span class="ident">w</span> <span class="op">=</span> <span class="ident">Wrapping</span>::<span class="op"><</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span><span class="op">></span>::<span class="ident">from_str_radix</span>(<span class="ident">s</span>, <span class="ident">r</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">w</span><span class="op">|</span> <span class="ident">w</span>.<span class="number">0</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">w</span>, <span class="op"><</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span> <span class="kw">as</span> <span class="ident">Num</span><span class="op">></span>::<span class="ident">from_str_radix</span>(<span class="ident">s</span>, <span class="ident">r</span>));
|
||
}
|
||
)<span class="op">+</span>
|
||
};
|
||
}
|
||
|
||
<span class="macro">test_wrapping_from_str_radix</span><span class="macro">!</span>(<span class="ident">usize</span> <span class="ident">u8</span> <span class="ident">u16</span> <span class="ident">u32</span> <span class="ident">u64</span> <span class="ident">isize</span> <span class="ident">i8</span> <span class="ident">i16</span> <span class="ident">i32</span> <span class="ident">i64</span>);
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">check_num_ops</span>() {
|
||
<span class="kw">fn</span> <span class="ident">compute</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Num</span> <span class="op">+</span> <span class="ident">Copy</span><span class="op">></span>(<span class="ident">x</span>: <span class="ident">T</span>, <span class="ident">y</span>: <span class="ident">T</span>) <span class="op">-</span><span class="op">></span> <span class="ident">T</span> {
|
||
<span class="ident">x</span> <span class="op">*</span> <span class="ident">y</span> <span class="op">/</span> <span class="ident">y</span> <span class="op">%</span> <span class="ident">y</span> <span class="op">+</span> <span class="ident">y</span> <span class="op">-</span> <span class="ident">y</span>
|
||
}
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">compute</span>(<span class="number">1</span>, <span class="number">2</span>), <span class="number">1</span>)
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">check_numref_ops</span>() {
|
||
<span class="kw">fn</span> <span class="ident">compute</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">NumRef</span><span class="op">></span>(<span class="ident">x</span>: <span class="ident">T</span>, <span class="ident">y</span>: <span class="kw-2">&</span><span class="ident">T</span>) <span class="op">-</span><span class="op">></span> <span class="ident">T</span> {
|
||
<span class="ident">x</span> <span class="op">*</span> <span class="ident">y</span> <span class="op">/</span> <span class="ident">y</span> <span class="op">%</span> <span class="ident">y</span> <span class="op">+</span> <span class="ident">y</span> <span class="op">-</span> <span class="ident">y</span>
|
||
}
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">compute</span>(<span class="number">1</span>, <span class="kw-2">&</span><span class="number">2</span>), <span class="number">1</span>)
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">check_refnum_ops</span>() {
|
||
<span class="kw">fn</span> <span class="ident">compute</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Copy</span><span class="op">></span>(<span class="ident">x</span>: <span class="kw-2">&</span><span class="ident">T</span>, <span class="ident">y</span>: <span class="ident">T</span>) <span class="op">-</span><span class="op">></span> <span class="ident">T</span>
|
||
<span class="kw">where</span>
|
||
<span class="kw">for</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span>: <span class="ident">RefNum</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
|
||
{
|
||
<span class="kw-2">&</span>(<span class="kw-2">&</span>(<span class="kw-2">&</span>(<span class="kw-2">&</span>(<span class="ident">x</span> <span class="op">*</span> <span class="ident">y</span>) <span class="op">/</span> <span class="ident">y</span>) <span class="op">%</span> <span class="ident">y</span>) <span class="op">+</span> <span class="ident">y</span>) <span class="op">-</span> <span class="ident">y</span>
|
||
}
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">compute</span>(<span class="kw-2">&</span><span class="number">1</span>, <span class="number">2</span>), <span class="number">1</span>)
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">check_refref_ops</span>() {
|
||
<span class="kw">fn</span> <span class="ident">compute</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>(<span class="ident">x</span>: <span class="kw-2">&</span><span class="ident">T</span>, <span class="ident">y</span>: <span class="kw-2">&</span><span class="ident">T</span>) <span class="op">-</span><span class="op">></span> <span class="ident">T</span>
|
||
<span class="kw">where</span>
|
||
<span class="kw">for</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span>: <span class="ident">RefNum</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
|
||
{
|
||
<span class="kw-2">&</span>(<span class="kw-2">&</span>(<span class="kw-2">&</span>(<span class="kw-2">&</span>(<span class="ident">x</span> <span class="op">*</span> <span class="ident">y</span>) <span class="op">/</span> <span class="ident">y</span>) <span class="op">%</span> <span class="ident">y</span>) <span class="op">+</span> <span class="ident">y</span>) <span class="op">-</span> <span class="ident">y</span>
|
||
}
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">compute</span>(<span class="kw-2">&</span><span class="number">1</span>, <span class="kw-2">&</span><span class="number">2</span>), <span class="number">1</span>)
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">check_numassign_ops</span>() {
|
||
<span class="kw">fn</span> <span class="ident">compute</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">NumAssign</span> <span class="op">+</span> <span class="ident">Copy</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="ident">x</span>: <span class="ident">T</span>, <span class="ident">y</span>: <span class="ident">T</span>) <span class="op">-</span><span class="op">></span> <span class="ident">T</span> {
|
||
<span class="ident">x</span> <span class="kw-2">*</span><span class="op">=</span> <span class="ident">y</span>;
|
||
<span class="ident">x</span> <span class="op">/</span><span class="op">=</span> <span class="ident">y</span>;
|
||
<span class="ident">x</span> <span class="op">%</span><span class="op">=</span> <span class="ident">y</span>;
|
||
<span class="ident">x</span> <span class="op">+</span><span class="op">=</span> <span class="ident">y</span>;
|
||
<span class="ident">x</span> <span class="op">-</span><span class="op">=</span> <span class="ident">y</span>;
|
||
<span class="ident">x</span>
|
||
}
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">compute</span>(<span class="number">1</span>, <span class="number">2</span>), <span class="number">1</span>)
|
||
}
|
||
|
||
<span class="comment">// TODO test `NumAssignRef`, but even the standard numeric types don't</span>
|
||
<span class="comment">// implement this yet. (see rust pr41336)</span>
|
||
</pre></div>
|
||
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