| <!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 of the Rust file `/home/runner/.cargo/registry/src/github.com-1ecc6299db9ec823/num-traits-0.2.14/src/bounds.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>bounds.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><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="../../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../../dark.css" disabled><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script src="../../crates.js"></script><script defer src="../../main.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script> |
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| </pre><pre class="rust"><code><span class="kw">use</span> <span class="ident">core::num::Wrapping</span>; |
| <span class="kw">use</span> <span class="ident">core</span>::{<span class="ident">f32</span>, <span class="ident">f64</span>}; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">has_i128</span>)]</span> |
| <span class="kw">use</span> <span class="ident">core</span>::{<span class="ident">i128</span>, <span class="ident">u128</span>}; |
| <span class="kw">use</span> <span class="ident">core</span>::{<span class="ident">i16</span>, <span class="ident">i32</span>, <span class="ident">i64</span>, <span class="ident">i8</span>, <span class="ident">isize</span>}; |
| <span class="kw">use</span> <span class="ident">core</span>::{<span class="ident">u16</span>, <span class="ident">u32</span>, <span class="ident">u64</span>, <span class="ident">u8</span>, <span class="ident">usize</span>}; |
| |
| <span class="doccomment">/// Numbers which have upper and lower bounds</span> |
| <span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">Bounded</span> { |
| <span class="comment">// FIXME (#5527): These should be associated constants</span> |
| <span class="doccomment">/// returns the smallest finite number this type can represent</span> |
| <span class="kw">fn</span> <span class="ident">min_value</span>() -> <span class="self">Self</span>; |
| <span class="doccomment">/// returns the largest finite number this type can represent</span> |
| <span class="kw">fn</span> <span class="ident">max_value</span>() -> <span class="self">Self</span>; |
| } |
| |
| <span class="macro">macro_rules!</span> <span class="ident">bounded_impl</span> { |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">ty</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">min</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">max</span>:<span class="ident">expr</span>) => { |
| <span class="kw">impl</span> <span class="ident">Bounded</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span> { |
| <span class="attribute">#[<span class="ident">inline</span>]</span> |
| <span class="kw">fn</span> <span class="ident">min_value</span>() -> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span> { |
| <span class="macro-nonterminal">$</span><span class="macro-nonterminal">min</span> |
| } |
| |
| <span class="attribute">#[<span class="ident">inline</span>]</span> |
| <span class="kw">fn</span> <span class="ident">max_value</span>() -> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span> { |
| <span class="macro-nonterminal">$</span><span class="macro-nonterminal">max</span> |
| } |
| } |
| }; |
| } |
| |
| <span class="macro">bounded_impl!</span>(<span class="ident">usize</span>, <span class="ident">usize::MIN</span>, <span class="ident">usize::MAX</span>); |
| <span class="macro">bounded_impl!</span>(<span class="ident">u8</span>, <span class="ident">u8::MIN</span>, <span class="ident">u8::MAX</span>); |
| <span class="macro">bounded_impl!</span>(<span class="ident">u16</span>, <span class="ident">u16::MIN</span>, <span class="ident">u16::MAX</span>); |
| <span class="macro">bounded_impl!</span>(<span class="ident">u32</span>, <span class="ident">u32::MIN</span>, <span class="ident">u32::MAX</span>); |
| <span class="macro">bounded_impl!</span>(<span class="ident">u64</span>, <span class="ident">u64::MIN</span>, <span class="ident">u64::MAX</span>); |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">has_i128</span>)]</span> |
| <span class="macro">bounded_impl!</span>(<span class="ident">u128</span>, <span class="ident">u128::MIN</span>, <span class="ident">u128::MAX</span>); |
| |
| <span class="macro">bounded_impl!</span>(<span class="ident">isize</span>, <span class="ident">isize::MIN</span>, <span class="ident">isize::MAX</span>); |
| <span class="macro">bounded_impl!</span>(<span class="ident">i8</span>, <span class="ident">i8::MIN</span>, <span class="ident">i8::MAX</span>); |
| <span class="macro">bounded_impl!</span>(<span class="ident">i16</span>, <span class="ident">i16::MIN</span>, <span class="ident">i16::MAX</span>); |
| <span class="macro">bounded_impl!</span>(<span class="ident">i32</span>, <span class="ident">i32::MIN</span>, <span class="ident">i32::MAX</span>); |
| <span class="macro">bounded_impl!</span>(<span class="ident">i64</span>, <span class="ident">i64::MIN</span>, <span class="ident">i64::MAX</span>); |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">has_i128</span>)]</span> |
| <span class="macro">bounded_impl!</span>(<span class="ident">i128</span>, <span class="ident">i128::MIN</span>, <span class="ident">i128::MAX</span>); |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Bounded</span><span class="op">></span> <span class="ident">Bounded</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">fn</span> <span class="ident">min_value</span>() -> <span class="self">Self</span> { |
| <span class="ident">Wrapping</span>(<span class="ident">T::min_value</span>()) |
| } |
| <span class="kw">fn</span> <span class="ident">max_value</span>() -> <span class="self">Self</span> { |
| <span class="ident">Wrapping</span>(<span class="ident">T::max_value</span>()) |
| } |
| } |
| |
| <span class="macro">bounded_impl!</span>(<span class="ident">f32</span>, <span class="ident">f32::MIN</span>, <span class="ident">f32::MAX</span>); |
| |
| <span class="macro">macro_rules!</span> <span class="ident">for_each_tuple_</span> { |
| ( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">m</span>:<span class="ident">ident</span> <span class="op">!</span><span class="op">!</span> ) => ( |
| <span class="macro-nonterminal">$</span><span class="macro">m!</span> { } |
| ); |
| ( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">m</span>:<span class="ident">ident</span> <span class="op">!</span><span class="op">!</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">h</span>:<span class="ident">ident</span>, $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">ident</span>,)<span class="op">*</span> ) => ( |
| <span class="macro-nonterminal">$</span><span class="macro">m!</span> { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">h</span> $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>)<span class="op">*</span> } |
| <span class="macro">for_each_tuple_!</span> { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">m</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="macro">macro_rules!</span> <span class="ident">for_each_tuple</span> { |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">m</span>:<span class="ident">ident</span>) => { |
| <span class="macro">for_each_tuple_!</span> { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">m</span> <span class="op">!</span><span class="op">!</span> <span class="ident">A</span>, <span class="ident">B</span>, <span class="ident">C</span>, <span class="ident">D</span>, <span class="ident">E</span>, <span class="ident">F</span>, <span class="ident">G</span>, <span class="ident">H</span>, <span class="ident">I</span>, <span class="ident">J</span>, <span class="ident">K</span>, <span class="ident">L</span>, <span class="ident">M</span>, <span class="ident">N</span>, <span class="ident">O</span>, <span class="ident">P</span>, <span class="ident">Q</span>, <span class="ident">R</span>, <span class="ident">S</span>, <span class="ident">T</span>, } |
| }; |
| } |
| |
| <span class="macro">macro_rules!</span> <span class="ident">bounded_tuple</span> { |
| ( $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span>)<span class="op">*</span> ) => ( |
| <span class="kw">impl</span><span class="op"><</span>$(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>: <span class="ident">Bounded</span>,)<span class="kw-2">*</span><span class="op">></span> <span class="ident">Bounded</span> <span class="kw">for</span> ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>,)<span class="kw-2">*</span>) { |
| <span class="attribute">#[<span class="ident">inline</span>]</span> |
| <span class="kw">fn</span> <span class="ident">min_value</span>() -> <span class="self">Self</span> { |
| ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name::min_value</span>(),)<span class="kw-2">*</span>) |
| } |
| <span class="attribute">#[<span class="ident">inline</span>]</span> |
| <span class="kw">fn</span> <span class="ident">max_value</span>() -> <span class="self">Self</span> { |
| ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name::max_value</span>(),)<span class="kw-2">*</span>) |
| } |
| } |
| ); |
| } |
| |
| <span class="macro">for_each_tuple!</span>(<span class="ident">bounded_tuple</span>); |
| <span class="macro">bounded_impl!</span>(<span class="ident">f64</span>, <span class="ident">f64::MIN</span>, <span class="ident">f64::MAX</span>); |
| |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">wrapping_bounded</span>() { |
| <span class="macro">macro_rules!</span> <span class="ident">test_wrapping_bounded</span> { |
| ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">ty</span>)<span class="op">+</span>) => { |
| $( |
| <span class="macro">assert_eq!</span>(<span class="op"><</span><span class="ident">Wrapping</span><span class="op"><</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span><span class="op">></span> <span class="kw">as</span> <span class="ident">Bounded</span><span class="op">></span><span class="ident">::min_value</span>().<span class="number">0</span>, <span class="op"><</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span><span class="op">></span><span class="ident">::min_value</span>()); |
| <span class="macro">assert_eq!</span>(<span class="op"><</span><span class="ident">Wrapping</span><span class="op"><</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span><span class="op">></span> <span class="kw">as</span> <span class="ident">Bounded</span><span class="op">></span><span class="ident">::max_value</span>().<span class="number">0</span>, <span class="op"><</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span><span class="op">></span><span class="ident">::max_value</span>()); |
| )<span class="op">+</span> |
| }; |
| } |
| |
| <span class="macro">test_wrapping_bounded!</span>(<span class="ident">usize</span> <span class="ident">u8</span> <span class="ident">u16</span> <span class="ident">u32</span> <span class="ident">u64</span> <span class="ident">isize</span> <span class="ident">i8</span> <span class="ident">i16</span> <span class="ident">i32</span> <span class="ident">i64</span>); |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">has_i128</span>)]</span> |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">wrapping_bounded_i128</span>() { |
| <span class="macro">macro_rules!</span> <span class="ident">test_wrapping_bounded</span> { |
| ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">ty</span>)<span class="op">+</span>) => { |
| $( |
| <span class="macro">assert_eq!</span>(<span class="op"><</span><span class="ident">Wrapping</span><span class="op"><</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span><span class="op">></span> <span class="kw">as</span> <span class="ident">Bounded</span><span class="op">></span><span class="ident">::min_value</span>().<span class="number">0</span>, <span class="op"><</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span><span class="op">></span><span class="ident">::min_value</span>()); |
| <span class="macro">assert_eq!</span>(<span class="op"><</span><span class="ident">Wrapping</span><span class="op"><</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span><span class="op">></span> <span class="kw">as</span> <span class="ident">Bounded</span><span class="op">></span><span class="ident">::max_value</span>().<span class="number">0</span>, <span class="op"><</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span><span class="op">></span><span class="ident">::max_value</span>()); |
| )<span class="op">+</span> |
| }; |
| } |
| |
| <span class="macro">test_wrapping_bounded!</span>(<span class="ident">u128</span> <span class="ident">i128</span>); |
| } |
| |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">wrapping_is_bounded</span>() { |
| <span class="kw">fn</span> <span class="ident">require_bounded</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Bounded</span><span class="op">></span>(<span class="kw">_</span>: <span class="kw-2">&</span><span class="ident">T</span>) {} |
| <span class="ident">require_bounded</span>(<span class="kw-2">&</span><span class="ident">Wrapping</span>(<span class="number">42_u32</span>)); |
| <span class="ident">require_bounded</span>(<span class="kw-2">&</span><span class="ident">Wrapping</span>(<span class="op">-</span><span class="number">42</span>)); |
| } |
| </code></pre></div> |
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