| <!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 `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/ahash-0.7.6/src/random_state.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>random_state.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" href="../../normalize.css"><link rel="stylesheet" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../ayu.css" disabled><link rel="stylesheet" href="../../dark.css" disabled><link rel="stylesheet" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../ahash/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../ahash/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="attribute">#[cfg(all(feature = <span class="string">"runtime-rng"</span>, not(all(feature = <span class="string">"compile-time-rng"</span>, test))))] |
| </span><span class="kw">use </span><span class="kw">crate</span>::convert::Convert; |
| <span class="attribute">#[cfg(feature = <span class="string">"specialize"</span>)] |
| </span><span class="kw">use </span><span class="kw">crate</span>::BuildHasherExt; |
| |
| <span class="attribute">#[cfg(any( |
| all(any(target_arch = <span class="string">"x86"</span>, target_arch = <span class="string">"x86_64"</span>), target_feature = <span class="string">"aes"</span>, not(miri)), |
| all(any(target_arch = <span class="string">"arm"</span>, target_arch = <span class="string">"aarch64"</span>), target_feature = <span class="string">"crypto"</span>, not(miri), feature = <span class="string">"stdsimd"</span>) |
| ))] |
| </span><span class="kw">pub use </span><span class="kw">crate</span>::aes_hash::<span class="kw-2">*</span>; |
| |
| <span class="attribute">#[cfg(not(any( |
| all(any(target_arch = <span class="string">"x86"</span>, target_arch = <span class="string">"x86_64"</span>), target_feature = <span class="string">"aes"</span>, not(miri)), |
| all(any(target_arch = <span class="string">"arm"</span>, target_arch = <span class="string">"aarch64"</span>), target_feature = <span class="string">"crypto"</span>, not(miri), feature = <span class="string">"stdsimd"</span>) |
| )))] |
| </span><span class="kw">pub use </span><span class="kw">crate</span>::fallback_hash::<span class="kw-2">*</span>; |
| |
| <span class="attribute">#[cfg(all(feature = <span class="string">"compile-time-rng"</span>, any(not(feature = <span class="string">"runtime-rng"</span>), test)))] |
| </span><span class="kw">use </span>const_random::const_random; |
| <span class="kw">use </span>core::any::{Any, TypeId}; |
| <span class="kw">use </span>core::fmt; |
| <span class="kw">use </span>core::hash::BuildHasher; |
| <span class="attribute">#[cfg(feature = <span class="string">"specialize"</span>)] |
| </span><span class="kw">use </span>core::hash::Hash; |
| <span class="kw">use </span>core::hash::Hasher; |
| |
| <span class="attribute">#[cfg(not(feature = <span class="string">"std"</span>))] |
| </span><span class="kw">extern crate </span>alloc; |
| <span class="attribute">#[cfg(feature = <span class="string">"std"</span>)] |
| </span><span class="kw">extern crate </span>std <span class="kw">as </span>alloc; |
| |
| <span class="kw">use </span>alloc::boxed::Box; |
| <span class="kw">use </span>core::sync::atomic::{AtomicUsize, Ordering}; |
| <span class="attribute">#[cfg(not(all(target_arch = <span class="string">"arm"</span>, target_os = <span class="string">"none"</span>)))] |
| </span><span class="kw">use </span>once_cell::race::OnceBox; |
| |
| <span class="attribute">#[cfg(any( |
| all(any(target_arch = <span class="string">"x86"</span>, target_arch = <span class="string">"x86_64"</span>), target_feature = <span class="string">"aes"</span>, not(miri)), |
| all(any(target_arch = <span class="string">"arm"</span>, target_arch = <span class="string">"aarch64"</span>), target_feature = <span class="string">"crypto"</span>, not(miri), feature = <span class="string">"stdsimd"</span>) |
| ))] |
| </span><span class="kw">use </span><span class="kw">crate</span>::aes_hash::<span class="kw-2">*</span>; |
| <span class="attribute">#[cfg(not(any( |
| all(any(target_arch = <span class="string">"x86"</span>, target_arch = <span class="string">"x86_64"</span>), target_feature = <span class="string">"aes"</span>, not(miri)), |
| all(any(target_arch = <span class="string">"arm"</span>, target_arch = <span class="string">"aarch64"</span>), target_feature = <span class="string">"crypto"</span>, not(miri), feature = <span class="string">"stdsimd"</span>) |
| )))] |
| </span><span class="kw">use </span><span class="kw">crate</span>::fallback_hash::<span class="kw-2">*</span>; |
| |
| <span class="attribute">#[cfg(not(all(target_arch = <span class="string">"arm"</span>, target_os = <span class="string">"none"</span>)))] |
| </span><span class="kw">static </span>RAND_SOURCE: OnceBox<Box<<span class="kw">dyn </span>RandomSource + Send + Sync>> = OnceBox::new(); |
| |
| <span class="doccomment">/// A supplier of Randomness used for different hashers. |
| /// See [RandomState.set_random_source]. |
| </span><span class="kw">pub trait </span>RandomSource { |
| |
| <span class="kw">fn </span>get_fixed_seeds(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="lifetime">'static </span>[[u64; <span class="number">4</span>]; <span class="number">2</span>]; |
| |
| <span class="kw">fn </span>gen_hasher_seed(<span class="kw-2">&</span><span class="self">self</span>) -> usize; |
| |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const </span>PI: [u64; <span class="number">4</span>] = [ |
| <span class="number">0x243f_6a88_85a3_08d3</span>, |
| <span class="number">0x1319_8a2e_0370_7344</span>, |
| <span class="number">0xa409_3822_299f_31d0</span>, |
| <span class="number">0x082e_fa98_ec4e_6c89</span>, |
| ]; |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const </span>PI2: [u64; <span class="number">4</span>] = [ |
| <span class="number">0x4528_21e6_38d0_1377</span>, |
| <span class="number">0xbe54_66cf_34e9_0c6c</span>, |
| <span class="number">0xc0ac_29b7_c97c_50dd</span>, |
| <span class="number">0x3f84_d5b5_b547_0917</span>, |
| ]; |
| |
| <span class="kw">struct </span>DefaultRandomSource { |
| counter: AtomicUsize, |
| } |
| |
| <span class="kw">impl </span>DefaultRandomSource { |
| <span class="kw">fn </span>new() -> DefaultRandomSource { |
| DefaultRandomSource { |
| counter: AtomicUsize::new(<span class="kw-2">&</span>PI <span class="kw">as </span><span class="kw-2">*const </span><span class="kw">_ as </span>usize), |
| } |
| } |
| |
| <span class="kw">const fn </span>default() -> DefaultRandomSource { |
| DefaultRandomSource { |
| counter: AtomicUsize::new(PI[<span class="number">3</span>] <span class="kw">as </span>usize), |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>RandomSource <span class="kw">for </span>DefaultRandomSource { |
| |
| <span class="attribute">#[cfg(all(feature = <span class="string">"runtime-rng"</span>, not(all(feature = <span class="string">"compile-time-rng"</span>, test))))] |
| </span><span class="kw">fn </span>get_fixed_seeds(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="lifetime">'static </span>[[u64; <span class="number">4</span>]; <span class="number">2</span>] { |
| <span class="kw">static </span>SEEDS: OnceBox<[[u64; <span class="number">4</span>]; <span class="number">2</span>]> = OnceBox::new(); |
| |
| SEEDS.get_or_init(|| { |
| <span class="kw">let </span><span class="kw-2">mut </span>result: [u8; <span class="number">64</span>] = [<span class="number">0</span>; <span class="number">64</span>]; |
| getrandom::getrandom(<span class="kw-2">&mut </span>result).expect(<span class="string">"getrandom::getrandom() failed."</span>); |
| Box::new(result.convert()) |
| }) |
| } |
| |
| <span class="attribute">#[cfg(all(feature = <span class="string">"compile-time-rng"</span>, any(not(feature = <span class="string">"runtime-rng"</span>), test)))] |
| </span><span class="kw">fn </span>get_fixed_seeds(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="lifetime">'static </span>[[u64; <span class="number">4</span>]; <span class="number">2</span>] { |
| <span class="kw">const </span>RAND: [[u64; <span class="number">4</span>]; <span class="number">2</span>] = [ |
| [ |
| <span class="macro">const_random!</span>(u64), |
| <span class="macro">const_random!</span>(u64), |
| <span class="macro">const_random!</span>(u64), |
| <span class="macro">const_random!</span>(u64), |
| ], [ |
| <span class="macro">const_random!</span>(u64), |
| <span class="macro">const_random!</span>(u64), |
| <span class="macro">const_random!</span>(u64), |
| <span class="macro">const_random!</span>(u64), |
| ] |
| ]; |
| <span class="kw-2">&</span>RAND |
| } |
| |
| <span class="attribute">#[cfg(all(not(feature = <span class="string">"runtime-rng"</span>), not(feature = <span class="string">"compile-time-rng"</span>)))] |
| </span><span class="kw">fn </span>get_fixed_seeds(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="lifetime">'static </span>[[u64; <span class="number">4</span>]; <span class="number">2</span>] { |
| <span class="kw-2">&</span>[PI, PI2] |
| } |
| |
| <span class="attribute">#[cfg(not(all(target_arch = <span class="string">"arm"</span>, target_os = <span class="string">"none"</span>)))] |
| </span><span class="kw">fn </span>gen_hasher_seed(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="kw">let </span>stack = <span class="self">self </span><span class="kw">as </span><span class="kw-2">*const </span><span class="kw">_ as </span>usize; |
| <span class="self">self</span>.counter.fetch_add(stack, Ordering::Relaxed) |
| } |
| |
| <span class="attribute">#[cfg(all(target_arch = <span class="string">"arm"</span>, target_os = <span class="string">"none"</span>))] |
| </span><span class="kw">fn </span>gen_hasher_seed(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="kw">let </span>stack = <span class="self">self </span><span class="kw">as </span><span class="kw-2">*const </span><span class="kw">_ as </span>usize; |
| <span class="kw">let </span>previous = <span class="self">self</span>.counter.load(Ordering::Relaxed); |
| <span class="kw">let </span>new = previous.wrapping_add(stack); |
| <span class="self">self</span>.counter.store(new, Ordering::Relaxed); |
| new |
| } |
| } |
| |
| <span class="doccomment">/// Provides a [Hasher] factory. This is typically used (e.g. by [HashMap]) to create |
| /// [AHasher]s in order to hash the keys of the map. See `build_hasher` below. |
| /// |
| /// [build_hasher]: ahash:: |
| /// [Hasher]: std::hash::Hasher |
| /// [BuildHasher]: std::hash::BuildHasher |
| /// [HashMap]: std::collections::HashMap |
| </span><span class="attribute">#[derive(Clone)] |
| </span><span class="kw">pub struct </span>RandomState { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) k0: u64, |
| <span class="kw">pub</span>(<span class="kw">crate</span>) k1: u64, |
| <span class="kw">pub</span>(<span class="kw">crate</span>) k2: u64, |
| <span class="kw">pub</span>(<span class="kw">crate</span>) k3: u64, |
| } |
| |
| <span class="kw">impl </span>fmt::Debug <span class="kw">for </span>RandomState { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| f.pad(<span class="string">"RandomState { .. }"</span>) |
| } |
| } |
| |
| <span class="kw">impl </span>RandomState { |
| |
| <span class="doccomment">/// Provides an optional way to manually supply a source of randomness for Hasher keys. |
| /// |
| /// The provided [RandomSource] will be used to be used as a source of randomness by [RandomState] to generate new states. |
| /// If this method is not invoked the standard source of randomness is used as described in the Readme. |
| /// |
| /// The source of randomness can only be set once, and must be set before the first RandomState is created. |
| /// If the source has already been specified `Err` is returned with a `bool` indicating if the set failed because |
| /// method was previously invoked (true) or if the default source is already being used (false). |
| </span><span class="attribute">#[cfg(not(all(target_arch = <span class="string">"arm"</span>, target_os = <span class="string">"none"</span>)))] |
| </span><span class="kw">pub fn </span>set_random_source(source: <span class="kw">impl </span>RandomSource + Send + Sync + <span class="lifetime">'static</span>) -> <span class="prelude-ty">Result</span><(), bool> { |
| RAND_SOURCE.set(Box::new(Box::new(source))).map_err(|s| s.as_ref().type_id() != TypeId::of::<<span class="kw-2">&</span>DefaultRandomSource>()) |
| } |
| |
| <span class="attribute">#[inline] |
| #[cfg(not(all(target_arch = <span class="string">"arm"</span>, target_os = <span class="string">"none"</span>)))] |
| </span><span class="kw">fn </span>get_src() -> <span class="kw-2">&</span><span class="lifetime">'static </span><span class="kw">dyn </span>RandomSource { |
| RAND_SOURCE.get_or_init(|| Box::new(Box::new(DefaultRandomSource::new()))).as_ref() |
| } |
| |
| <span class="attribute">#[inline] |
| #[cfg(all(target_arch = <span class="string">"arm"</span>, target_os = <span class="string">"none"</span>))] |
| </span><span class="kw">fn </span>get_src() -> <span class="kw-2">&</span><span class="lifetime">'static </span><span class="kw">dyn </span>RandomSource { |
| <span class="kw">static </span>RAND_SOURCE: DefaultRandomSource = DefaultRandomSource::default(); |
| <span class="kw-2">&</span>RAND_SOURCE |
| } |
| |
| <span class="doccomment">/// Use randomly generated keys |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>new() -> RandomState { |
| <span class="kw">let </span>src = <span class="self">Self</span>::get_src(); |
| <span class="kw">let </span>fixed = src.get_fixed_seeds(); |
| <span class="self">Self</span>::from_keys(<span class="kw-2">&</span>fixed[<span class="number">0</span>], <span class="kw-2">&</span>fixed[<span class="number">1</span>], src.gen_hasher_seed()) |
| } |
| |
| <span class="doccomment">/// Allows for supplying seeds, but each time it is called the resulting state will be different. |
| /// This is done using a static counter, so it can safely be used with a fixed keys. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>generate_with(k0: u64, k1: u64, k2: u64, k3: u64) -> RandomState { |
| <span class="kw">let </span>src = <span class="self">Self</span>::get_src(); |
| <span class="kw">let </span>fixed = src.get_fixed_seeds(); |
| RandomState::from_keys(<span class="kw-2">&</span>fixed[<span class="number">0</span>], <span class="kw-2">&</span>[k0, k1, k2, k3], src.gen_hasher_seed()) |
| } |
| |
| <span class="kw">fn </span>from_keys(a: <span class="kw-2">&</span>[u64; <span class="number">4</span>], b: <span class="kw-2">&</span>[u64; <span class="number">4</span>], c: usize) -> RandomState { |
| <span class="kw">let </span><span class="kw-2">&</span>[k0, k1, k2, k3] = a; |
| <span class="kw">let </span><span class="kw-2">mut </span>hasher = AHasher::from_random_state(<span class="kw-2">&</span>RandomState { k0, k1, k2, k3 }); |
| hasher.write_usize(c); |
| <span class="kw">let </span>mix = |k: u64| { |
| <span class="kw">let </span><span class="kw-2">mut </span>h = hasher.clone(); |
| h.write_u64(k); |
| h.finish() |
| }; |
| RandomState { |
| k0: mix(b[<span class="number">0</span>]), |
| k1: mix(b[<span class="number">1</span>]), |
| k2: mix(b[<span class="number">2</span>]), |
| k3: mix(b[<span class="number">3</span>]), |
| } |
| } |
| |
| <span class="doccomment">/// Internal. Used by Default. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>with_fixed_keys() -> RandomState { |
| <span class="kw">let </span>[k0, k1, k2, k3] = <span class="self">Self</span>::get_src().get_fixed_seeds()[<span class="number">0</span>]; |
| RandomState { k0, k1, k2, k3 } |
| } |
| |
| <span class="doccomment">/// Allows for explicitly setting a seed to used. |
| /// |
| /// Note: This method does not require the provided seed to be strong. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>with_seed(key: usize) -> RandomState { |
| <span class="kw">let </span>fixed = <span class="self">Self</span>::get_src().get_fixed_seeds(); |
| RandomState::from_keys(<span class="kw-2">&</span>fixed[<span class="number">0</span>], <span class="kw-2">&</span>fixed[<span class="number">1</span>], key) |
| } |
| |
| <span class="doccomment">/// Allows for explicitly setting the seeds to used. |
| /// |
| /// Note: This method is robust against 0s being passed for one or more of the parameters |
| /// or the same value being passed for more than one parameter. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub const fn </span>with_seeds(k0: u64, k1: u64, k2: u64, k3: u64) -> RandomState { |
| RandomState { k0: k0 ^ PI2[<span class="number">0</span>], k1: k1 ^ PI2[<span class="number">1</span>], k2: k2 ^ PI2[<span class="number">2</span>], k3: k3 ^ PI2[<span class="number">3</span>] } |
| } |
| } |
| |
| <span class="kw">impl </span>Default <span class="kw">for </span>RandomState { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>default() -> <span class="self">Self </span>{ |
| <span class="self">Self</span>::new() |
| } |
| } |
| |
| <span class="kw">impl </span>BuildHasher <span class="kw">for </span>RandomState { |
| <span class="kw">type </span>Hasher = AHasher; |
| |
| <span class="doccomment">/// Constructs a new [AHasher] with keys based on this [RandomState] object. |
| /// This means that two different [RandomState]s will will generate |
| /// [AHasher]s that will return different hashcodes, but [Hasher]s created from the same [BuildHasher] |
| /// will generate the same hashes for the same input data. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use ahash::{AHasher, RandomState}; |
| /// use std::hash::{Hasher, BuildHasher}; |
| /// |
| /// let build_hasher = RandomState::new(); |
| /// let mut hasher_1 = build_hasher.build_hasher(); |
| /// let mut hasher_2 = build_hasher.build_hasher(); |
| /// |
| /// hasher_1.write_u32(1234); |
| /// hasher_2.write_u32(1234); |
| /// |
| /// assert_eq!(hasher_1.finish(), hasher_2.finish()); |
| /// |
| /// let other_build_hasher = RandomState::new(); |
| /// let mut different_hasher = other_build_hasher.build_hasher(); |
| /// different_hasher.write_u32(1234); |
| /// assert_ne!(different_hasher.finish(), hasher_1.finish()); |
| /// ``` |
| /// [Hasher]: std::hash::Hasher |
| /// [BuildHasher]: std::hash::BuildHasher |
| /// [HashMap]: std::collections::HashMap |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">fn </span>build_hasher(<span class="kw-2">&</span><span class="self">self</span>) -> AHasher { |
| AHasher::from_random_state(<span class="self">self</span>) |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"specialize"</span>)] |
| </span><span class="kw">impl </span>BuildHasherExt <span class="kw">for </span>RandomState { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>hash_as_u64<T: Hash + <span class="question-mark">?</span>Sized>(<span class="kw-2">&</span><span class="self">self</span>, value: <span class="kw-2">&</span>T) -> u64 { |
| <span class="kw">let </span><span class="kw-2">mut </span>hasher = AHasherU64 { |
| buffer: <span class="self">self</span>.k0, |
| pad: <span class="self">self</span>.k1, |
| }; |
| value.hash(<span class="kw-2">&mut </span>hasher); |
| hasher.finish() |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>hash_as_fixed_length<T: Hash + <span class="question-mark">?</span>Sized>(<span class="kw-2">&</span><span class="self">self</span>, value: <span class="kw-2">&</span>T) -> u64 { |
| <span class="kw">let </span><span class="kw-2">mut </span>hasher = AHasherFixed(<span class="self">self</span>.build_hasher()); |
| value.hash(<span class="kw-2">&mut </span>hasher); |
| hasher.finish() |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>hash_as_str<T: Hash + <span class="question-mark">?</span>Sized>(<span class="kw-2">&</span><span class="self">self</span>, value: <span class="kw-2">&</span>T) -> u64 { |
| <span class="kw">let </span><span class="kw-2">mut </span>hasher = AHasherStr(<span class="self">self</span>.build_hasher()); |
| value.hash(<span class="kw-2">&mut </span>hasher); |
| hasher.finish() |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>test { |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_unique() { |
| <span class="kw">let </span>a = RandomState::new(); |
| <span class="kw">let </span>b = RandomState::new(); |
| <span class="macro">assert_ne!</span>(a.build_hasher().finish(), b.build_hasher().finish()); |
| } |
| |
| <span class="attribute">#[cfg(all(feature = <span class="string">"runtime-rng"</span>, not(all(feature = <span class="string">"compile-time-rng"</span>, test))))] |
| #[test] |
| </span><span class="kw">fn </span>test_not_pi() { |
| <span class="macro">assert_ne!</span>(PI, RandomState::get_src().get_fixed_seeds()[<span class="number">0</span>]); |
| } |
| |
| <span class="attribute">#[cfg(all(feature = <span class="string">"compile-time-rng"</span>, any(not(feature = <span class="string">"runtime-rng"</span>), test)))] |
| #[test] |
| </span><span class="kw">fn </span>test_not_pi_const() { |
| <span class="macro">assert_ne!</span>(PI, RandomState::get_src().get_fixed_seeds()[<span class="number">0</span>]); |
| } |
| |
| <span class="attribute">#[cfg(all(not(feature = <span class="string">"runtime-rng"</span>), not(feature = <span class="string">"compile-time-rng"</span>)))] |
| #[test] |
| </span><span class="kw">fn </span>test_pi() { |
| <span class="macro">assert_eq!</span>(PI, RandomState::get_src().get_fixed_seeds()[<span class="number">0</span>]); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_with_seeds_const() { |
| <span class="kw">const </span>_CONST_RANDOM_STATE: RandomState = RandomState::with_seeds(<span class="number">17</span>, <span class="number">19</span>, <span class="number">21</span>, <span class="number">23</span>); |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="ahash" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
