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</a><h2 class="location"><a href="#">SeedableRng</a></h2><div class="sidebar-elems"><section><div class="block"><h3 class="sidebar-title"><a href="#required-associated-types">Required Associated Types</a></h3><ul><li><a href="#associatedtype.Seed">Seed</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#required-methods">Required Methods</a></h3><ul><li><a href="#tymethod.from_seed">from_seed</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#provided-methods">Provided Methods</a></h3><ul><li><a href="#method.from_entropy">from_entropy</a></li><li><a href="#method.from_rng">from_rng</a></li><li><a href="#method.seed_from_u64">seed_from_u64</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#foreign-impls">Implementations on Foreign Types</a></h3><ul><li><a href="#impl-SeedableRng-for-BlockRng64%3CR%3E">BlockRng64<R></a></li><li><a href="#impl-SeedableRng-for-BlockRng%3CR%3E">BlockRng<R></a></li><li><a href="#impl-SeedableRng-for-ChaCha12Core">ChaCha12Core</a></li><li><a href="#impl-SeedableRng-for-ChaCha12Rng">ChaCha12Rng</a></li><li><a href="#impl-SeedableRng-for-ChaCha20Core">ChaCha20Core</a></li><li><a href="#impl-SeedableRng-for-ChaCha20Rng">ChaCha20Rng</a></li><li><a href="#impl-SeedableRng-for-ChaCha8Core">ChaCha8Core</a></li><li><a href="#impl-SeedableRng-for-ChaCha8Rng">ChaCha8Rng</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#implementors">Implementors</a></h3></div></section><h2 class="location"><a href="index.html">In rand</a></h2><div id="sidebar-vars" data-name="SeedableRng" data-ty="trait" data-relpath=""></div><script defer src="sidebar-items.js"></script></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../rand/index.html">
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<h1 class="fqn"><span class="in-band">Trait <a href="index.html">rand</a>::<wbr><a class="trait" href="#">SeedableRng</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../src/rand_core/lib.rs.html#217-390">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="docblock item-decl"><pre class="rust trait"><code>pub trait SeedableRng {
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type <a href="#associatedtype.Seed" class="associatedtype">Seed</a>: <a class="trait" href="https://doc.rust-lang.org/1.62.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.62.1/core/default/trait.Default.html" title="trait core::default::Default">Default</a> + <a class="trait" href="https://doc.rust-lang.org/1.62.1/core/convert/trait.AsMut.html" title="trait core::convert::AsMut">AsMut</a><<a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.slice.html">[</a><a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.slice.html">]</a>>;
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fn <a href="#tymethod.from_seed" class="fnname">from_seed</a>(seed: Self::<a class="associatedtype" href="trait.SeedableRng.html#associatedtype.Seed" title="type rand::SeedableRng::Seed">Seed</a>) -> Self;
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fn <a href="#method.seed_from_u64" class="fnname">seed_from_u64</a>(state: <a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.u64.html">u64</a>) -> Self { ... }
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<span class="item-spacer"></span> fn <a href="#method.from_rng" class="fnname">from_rng</a><R>(rng: R) -> <a class="enum" href="https://doc.rust-lang.org/1.62.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><Self, <a class="struct" href="struct.Error.html" title="struct rand::Error">Error</a>><br> <span class="where">where<br> R: <a class="trait" href="trait.RngCore.html" title="trait rand::RngCore">RngCore</a></span>,
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{ ... }
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<span class="item-spacer"></span> fn <a href="#method.from_entropy" class="fnname">from_entropy</a>() -> Self { ... }
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}</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A random number generator that can be explicitly seeded.</p>
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<p>This trait encapsulates the low-level functionality common to all
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pseudo-random number generators (PRNGs, or algorithmic generators).</p>
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</div></details><h2 id="required-associated-types" class="small-section-header">Required Associated Types<a href="#required-associated-types" class="anchor"></a></h2><div class="methods"><details class="rustdoc-toggle" open><summary><div id="associatedtype.Seed" class="method has-srclink"><div class="rightside"><a class="srclink" href="../src/rand_core/lib.rs.html#263">source</a></div><h4 class="code-header">type <a href="#associatedtype.Seed" class="associatedtype">Seed</a>: <a class="trait" href="https://doc.rust-lang.org/1.62.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.62.1/core/default/trait.Default.html" title="trait core::default::Default">Default</a> + <a class="trait" href="https://doc.rust-lang.org/1.62.1/core/convert/trait.AsMut.html" title="trait core::convert::AsMut">AsMut</a><<a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.slice.html">[</a><a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.slice.html">]</a>></h4></div></summary><div class="docblock"><p>Seed type, which is restricted to types mutably-dereferencable as <code>u8</code>
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arrays (we recommend <code>[u8; N]</code> for some <code>N</code>).</p>
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<p>It is recommended to seed PRNGs with a seed of at least circa 100 bits,
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which means an array of <code>[u8; 12]</code> or greater to avoid picking RNGs with
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partially overlapping periods.</p>
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<p>For cryptographic RNG’s a seed of 256 bits is recommended, <code>[u8; 32]</code>.</p>
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<h5 id="implementing-seedablerng-for-rngs-with-large-seeds"><a href="#implementing-seedablerng-for-rngs-with-large-seeds">Implementing <code>SeedableRng</code> for RNGs with large seeds</a></h5>
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<p>Note that the required traits <code>core::default::Default</code> and
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<code>core::convert::AsMut<u8></code> are not implemented for large arrays
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<code>[u8; N]</code> with <code>N</code> > 32. To be able to implement the traits required by
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<code>SeedableRng</code> for RNGs with such large seeds, the newtype pattern can be
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used:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">rand_core::SeedableRng</span>;
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<span class="kw">const</span> <span class="ident">N</span>: <span class="ident">usize</span> <span class="op">=</span> <span class="number">64</span>;
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<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">MyRngSeed</span>(<span class="kw">pub</span> [<span class="ident">u8</span>; <span class="ident">N</span>]);
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<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">MyRng</span>(<span class="ident">MyRngSeed</span>);
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<span class="kw">impl</span> <span class="ident">Default</span> <span class="kw">for</span> <span class="ident">MyRngSeed</span> {
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<span class="kw">fn</span> <span class="ident">default</span>() -> <span class="ident">MyRngSeed</span> {
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<span class="ident">MyRngSeed</span>([<span class="number">0</span>; <span class="ident">N</span>])
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}
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}
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<span class="kw">impl</span> <span class="ident">AsMut</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">></span> <span class="kw">for</span> <span class="ident">MyRngSeed</span> {
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<span class="kw">fn</span> <span class="ident">as_mut</span>(<span class="kw-2">&mut</span> <span class="self">self</span>) -> <span class="kw-2">&mut</span> [<span class="ident">u8</span>] {
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<span class="kw-2">&mut</span> <span class="self">self</span>.<span class="number">0</span>
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}
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}
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<span class="kw">impl</span> <span class="ident">SeedableRng</span> <span class="kw">for</span> <span class="ident">MyRng</span> {
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<span class="kw">type</span> <span class="ident">Seed</span> <span class="op">=</span> <span class="ident">MyRngSeed</span>;
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<span class="kw">fn</span> <span class="ident">from_seed</span>(<span class="ident">seed</span>: <span class="ident">MyRngSeed</span>) -> <span class="ident">MyRng</span> {
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<span class="ident">MyRng</span>(<span class="ident">seed</span>)
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}
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}</code></pre></div>
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</div></details></div><h2 id="required-methods" class="small-section-header">Required Methods<a href="#required-methods" class="anchor"></a></h2><div class="methods"><details class="rustdoc-toggle" open><summary><div id="tymethod.from_seed" class="method has-srclink"><div class="rightside"><a class="srclink" href="../src/rand_core/lib.rs.html#290">source</a></div><h4 class="code-header">fn <a href="#tymethod.from_seed" class="fnname">from_seed</a>(seed: Self::<a class="associatedtype" href="trait.SeedableRng.html#associatedtype.Seed" title="type rand::SeedableRng::Seed">Seed</a>) -> Self</h4></div></summary><div class="docblock"><p>Create a new PRNG using the given seed.</p>
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<p>PRNG implementations are allowed to assume that bits in the seed are
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well distributed. That means usually that the number of one and zero
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bits are roughly equal, and values like 0, 1 and (size - 1) are unlikely.
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Note that many non-cryptographic PRNGs will show poor quality output
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if this is not adhered to. If you wish to seed from simple numbers, use
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<code>seed_from_u64</code> instead.</p>
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<p>All PRNG implementations should be reproducible unless otherwise noted:
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given a fixed <code>seed</code>, the same sequence of output should be produced
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on all runs, library versions and architectures (e.g. check endianness).
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Any “value-breaking” changes to the generator should require bumping at
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least the minor version and documentation of the change.</p>
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<p>It is not required that this function yield the same state as a
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reference implementation of the PRNG given equivalent seed; if necessary
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another constructor replicating behaviour from a reference
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implementation can be added.</p>
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<p>PRNG implementations should make sure <code>from_seed</code> never panics. In the
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case that some special values (like an all zero seed) are not viable
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seeds it is preferable to map these to alternative constant value(s),
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for example <code>0xBAD5EEDu32</code> or <code>0x0DDB1A5E5BAD5EEDu64</code> (“odd biases? bad
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seed”). This is assuming only a small number of values must be rejected.</p>
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</div></details></div><h2 id="provided-methods" class="small-section-header">Provided Methods<a href="#provided-methods" class="anchor"></a></h2><div class="methods"><details class="rustdoc-toggle" open><summary><div id="method.seed_from_u64" class="method has-srclink"><div class="rightside"><a class="srclink" href="../src/rand_core/lib.rs.html#306">source</a></div><h4 class="code-header">fn <a href="#method.seed_from_u64" class="fnname">seed_from_u64</a>(state: <a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.u64.html">u64</a>) -> Self</h4></div></summary><div class="docblock"><p>Create a new PRNG using a <code>u64</code> seed.</p>
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<p>This is a convenience-wrapper around <code>from_seed</code> to allow construction
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of any <code>SeedableRng</code> from a simple <code>u64</code> value. It is designed such that
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low Hamming Weight numbers like 0 and 1 can be used and should still
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result in good, independent seeds to the PRNG which is returned.</p>
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<p>This <strong>is not suitable for cryptography</strong>, as should be clear given that
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the input size is only 64 bits.</p>
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<p>Implementations for PRNGs <em>may</em> provide their own implementations of
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this function, but the default implementation should be good enough for
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all purposes. <em>Changing</em> the implementation of this function should be
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considered a value-breaking change.</p>
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</div></details><details class="rustdoc-toggle" open><summary><div id="method.from_rng" class="method has-srclink"><div class="rightside"><a class="srclink" href="../src/rand_core/lib.rs.html#361">source</a></div><h4 class="code-header">fn <a href="#method.from_rng" class="fnname">from_rng</a><R>(rng: R) -> <a class="enum" href="https://doc.rust-lang.org/1.62.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><Self, <a class="struct" href="struct.Error.html" title="struct rand::Error">Error</a>> <span class="where fmt-newline">where<br> R: <a class="trait" href="trait.RngCore.html" title="trait rand::RngCore">RngCore</a>, </span></h4></div></summary><div class="docblock"><p>Create a new PRNG seeded from another <code>Rng</code>.</p>
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<p>This may be useful when needing to rapidly seed many PRNGs from a master
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PRNG, and to allow forking of PRNGs. It may be considered deterministic.</p>
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<p>The master PRNG should be at least as high quality as the child PRNGs.
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When seeding non-cryptographic child PRNGs, we recommend using a
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different algorithm for the master PRNG (ideally a CSPRNG) to avoid
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correlations between the child PRNGs. If this is not possible (e.g.
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forking using small non-crypto PRNGs) ensure that your PRNG has a good
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mixing function on the output or consider use of a hash function with
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<code>from_seed</code>.</p>
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<p>Note that seeding <code>XorShiftRng</code> from another <code>XorShiftRng</code> provides an
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extreme example of what can go wrong: the new PRNG will be a clone
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of the parent.</p>
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<p>PRNG implementations are allowed to assume that a good RNG is provided
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for seeding, and that it is cryptographically secure when appropriate.
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As of <code>rand</code> 0.7 / <code>rand_core</code> 0.5, implementations overriding this
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method should ensure the implementation satisfies reproducibility
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(in prior versions this was not required).</p>
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</div></details><details class="rustdoc-toggle" open><summary><div id="method.from_entropy" class="method has-srclink"><div class="rightside"><a class="srclink" href="../src/rand_core/lib.rs.html#383">source</a></div><h4 class="code-header">fn <a href="#method.from_entropy" class="fnname">from_entropy</a>() -> Self</h4></div></summary><div class="docblock"><p>Creates a new instance of the RNG seeded via <a href="https://docs.rs/getrandom"><code>getrandom</code></a>.</p>
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<p>This method is the recommended way to construct non-deterministic PRNGs
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since it is convenient and secure.</p>
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<p>In case the overhead of using <a href="https://docs.rs/getrandom"><code>getrandom</code></a> to seed <em>many</em> PRNGs is an
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issue, one may prefer to seed from a local PRNG, e.g.
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<code>from_rng(thread_rng()).unwrap()</code>.</p>
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<h5 id="panics"><a href="#panics">Panics</a></h5>
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<p>If <a href="https://docs.rs/getrandom"><code>getrandom</code></a> is unable to provide secure entropy this method will panic.</p>
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</div></details></div><h2 id="foreign-impls" class="small-section-header">Implementations on Foreign Types<a href="#foreign-impls" class="anchor"></a></h2><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-SeedableRng-for-BlockRng64%3CR%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../src/rand_core/block.rs.html#418-435">source</a></span><a href="#impl-SeedableRng-for-BlockRng64%3CR%3E" class="anchor"></a><h3 class="code-header in-band">impl<R> <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a> for <a class="struct" href="../rand_core/block/struct.BlockRng64.html" title="struct rand_core::block::BlockRng64">BlockRng64</a><R> <span class="where fmt-newline">where<br> R: <a class="trait" href="../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a> + <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a>, </span></h3></section></summary><div class="impl-items"><section id="associatedtype.Seed-1" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Seed-1" class="anchor"></a><h4 class="code-header">type <a href="#associatedtype.Seed" class="associatedtype">Seed</a> = <R as <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a>>::<a class="associatedtype" href="trait.SeedableRng.html#associatedtype.Seed" title="type rand::SeedableRng::Seed">Seed</a></h4></section><section id="method.from_seed" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="../src/rand_core/block.rs.html#422">source</a></span><a href="#method.from_seed" class="anchor"></a><h4 class="code-header">fn <a href="#tymethod.from_seed" class="fnname">from_seed</a>(seed: <<a class="struct" href="../rand_core/block/struct.BlockRng64.html" title="struct rand_core::block::BlockRng64">BlockRng64</a><R> as <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a>>::<a class="associatedtype" href="trait.SeedableRng.html#associatedtype.Seed" title="type rand::SeedableRng::Seed">Seed</a>) -> <a class="struct" href="../rand_core/block/struct.BlockRng64.html" title="struct rand_core::block::BlockRng64">BlockRng64</a><R></h4></section><section id="method.seed_from_u64-1" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="../src/rand_core/block.rs.html#427">source</a></span><a href="#method.seed_from_u64-1" class="anchor"></a><h4 class="code-header">fn <a href="#method.seed_from_u64" class="fnname">seed_from_u64</a>(seed: <a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.u64.html">u64</a>) -> <a class="struct" href="../rand_core/block/struct.BlockRng64.html" title="struct rand_core::block::BlockRng64">BlockRng64</a><R></h4></section><section id="method.from_rng-1" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="../src/rand_core/block.rs.html#432">source</a></span><a href="#method.from_rng-1" class="anchor"></a><h4 class="code-header">fn <a href="#method.from_rng" class="fnname">from_rng</a><S>(rng: S) -> <a class="enum" href="https://doc.rust-lang.org/1.62.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="../rand_core/block/struct.BlockRng64.html" title="struct rand_core::block::BlockRng64">BlockRng64</a><R>, <a class="struct" href="struct.Error.html" title="struct rand::Error">Error</a>> <span class="where fmt-newline">where<br> S: <a class="trait" href="trait.RngCore.html" title="trait rand::RngCore">RngCore</a>, </span></h4></section></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-SeedableRng-for-BlockRng%3CR%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../src/rand_core/block.rs.html#243-260">source</a></span><a href="#impl-SeedableRng-for-BlockRng%3CR%3E" class="anchor"></a><h3 class="code-header in-band">impl<R> <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a> for <a class="struct" href="../rand_core/block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a><R> <span class="where fmt-newline">where<br> R: <a class="trait" href="../rand_core/block/trait.BlockRngCore.html" title="trait rand_core::block::BlockRngCore">BlockRngCore</a> + <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a>, </span></h3></section></summary><div class="impl-items"><section id="associatedtype.Seed-2" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Seed-2" class="anchor"></a><h4 class="code-header">type <a href="#associatedtype.Seed" class="associatedtype">Seed</a> = <R as <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a>>::<a class="associatedtype" href="trait.SeedableRng.html#associatedtype.Seed" title="type rand::SeedableRng::Seed">Seed</a></h4></section><section id="method.from_seed-1" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="../src/rand_core/block.rs.html#247">source</a></span><a href="#method.from_seed-1" class="anchor"></a><h4 class="code-header">fn <a href="#tymethod.from_seed" class="fnname">from_seed</a>(seed: <<a class="struct" href="../rand_core/block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a><R> as <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a>>::<a class="associatedtype" href="trait.SeedableRng.html#associatedtype.Seed" title="type rand::SeedableRng::Seed">Seed</a>) -> <a class="struct" href="../rand_core/block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a><R></h4></section><section id="method.seed_from_u64-2" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="../src/rand_core/block.rs.html#252">source</a></span><a href="#method.seed_from_u64-2" class="anchor"></a><h4 class="code-header">fn <a href="#method.seed_from_u64" class="fnname">seed_from_u64</a>(seed: <a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.u64.html">u64</a>) -> <a class="struct" href="../rand_core/block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a><R></h4></section><section id="method.from_rng-2" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="../src/rand_core/block.rs.html#257">source</a></span><a href="#method.from_rng-2" class="anchor"></a><h4 class="code-header">fn <a href="#method.from_rng" class="fnname">from_rng</a><S>(rng: S) -> <a class="enum" href="https://doc.rust-lang.org/1.62.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="../rand_core/block/struct.BlockRng.html" title="struct rand_core::block::BlockRng">BlockRng</a><R>, <a class="struct" href="struct.Error.html" title="struct rand::Error">Error</a>> <span class="where fmt-newline">where<br> S: <a class="trait" href="trait.RngCore.html" title="trait rand::RngCore">RngCore</a>, </span></h4></section></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-SeedableRng-for-ChaCha12Rng" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../src/rand_chacha/chacha.rs.html#344">source</a></span><a href="#impl-SeedableRng-for-ChaCha12Rng" class="anchor"></a><h3 class="code-header in-band">impl <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a> for <a class="struct" href="../rand_chacha/chacha/struct.ChaCha12Rng.html" title="struct rand_chacha::chacha::ChaCha12Rng">ChaCha12Rng</a></h3></section></summary><div class="impl-items"><section id="associatedtype.Seed-3" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Seed-3" class="anchor"></a><h4 class="code-header">type <a href="#associatedtype.Seed" class="associatedtype">Seed</a> = <a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.array.html">[</a><a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.array.html">; 32]</a></h4></section><section id="method.from_seed-2" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="../src/rand_chacha/chacha.rs.html#344">source</a></span><a href="#method.from_seed-2" class="anchor"></a><h4 class="code-header">fn <a href="#tymethod.from_seed" class="fnname">from_seed</a>(seed: <<a class="struct" href="../rand_chacha/chacha/struct.ChaCha12Rng.html" title="struct rand_chacha::chacha::ChaCha12Rng">ChaCha12Rng</a> as <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a>>::<a class="associatedtype" href="trait.SeedableRng.html#associatedtype.Seed" title="type rand::SeedableRng::Seed">Seed</a>) -> <a class="struct" href="../rand_chacha/chacha/struct.ChaCha12Rng.html" title="struct rand_chacha::chacha::ChaCha12Rng">ChaCha12Rng</a></h4></section></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-SeedableRng-for-ChaCha8Rng" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../src/rand_chacha/chacha.rs.html#345">source</a></span><a href="#impl-SeedableRng-for-ChaCha8Rng" class="anchor"></a><h3 class="code-header in-band">impl <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a> for <a class="struct" href="../rand_chacha/chacha/struct.ChaCha8Rng.html" title="struct rand_chacha::chacha::ChaCha8Rng">ChaCha8Rng</a></h3></section></summary><div class="impl-items"><section id="associatedtype.Seed-4" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Seed-4" class="anchor"></a><h4 class="code-header">type <a href="#associatedtype.Seed" class="associatedtype">Seed</a> = <a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.array.html">[</a><a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.array.html">; 32]</a></h4></section><section id="method.from_seed-3" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="../src/rand_chacha/chacha.rs.html#345">source</a></span><a href="#method.from_seed-3" class="anchor"></a><h4 class="code-header">fn <a href="#tymethod.from_seed" class="fnname">from_seed</a>(seed: <<a class="struct" href="../rand_chacha/chacha/struct.ChaCha8Rng.html" title="struct rand_chacha::chacha::ChaCha8Rng">ChaCha8Rng</a> as <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a>>::<a class="associatedtype" href="trait.SeedableRng.html#associatedtype.Seed" title="type rand::SeedableRng::Seed">Seed</a>) -> <a class="struct" href="../rand_chacha/chacha/struct.ChaCha8Rng.html" title="struct rand_chacha::chacha::ChaCha8Rng">ChaCha8Rng</a></h4></section></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-SeedableRng-for-ChaCha12Core" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../src/rand_chacha/chacha.rs.html#344">source</a></span><a href="#impl-SeedableRng-for-ChaCha12Core" class="anchor"></a><h3 class="code-header in-band">impl <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a> for <a class="struct" href="../rand_chacha/chacha/struct.ChaCha12Core.html" title="struct rand_chacha::chacha::ChaCha12Core">ChaCha12Core</a></h3></section></summary><div class="impl-items"><section id="associatedtype.Seed-5" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Seed-5" class="anchor"></a><h4 class="code-header">type <a href="#associatedtype.Seed" class="associatedtype">Seed</a> = <a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.array.html">[</a><a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.array.html">; 32]</a></h4></section><section id="method.from_seed-4" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="../src/rand_chacha/chacha.rs.html#344">source</a></span><a href="#method.from_seed-4" class="anchor"></a><h4 class="code-header">fn <a href="#tymethod.from_seed" class="fnname">from_seed</a>(seed: <<a class="struct" href="../rand_chacha/chacha/struct.ChaCha12Core.html" title="struct rand_chacha::chacha::ChaCha12Core">ChaCha12Core</a> as <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a>>::<a class="associatedtype" href="trait.SeedableRng.html#associatedtype.Seed" title="type rand::SeedableRng::Seed">Seed</a>) -> <a class="struct" href="../rand_chacha/chacha/struct.ChaCha12Core.html" title="struct rand_chacha::chacha::ChaCha12Core">ChaCha12Core</a></h4></section></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-SeedableRng-for-ChaCha20Core" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../src/rand_chacha/chacha.rs.html#343">source</a></span><a href="#impl-SeedableRng-for-ChaCha20Core" class="anchor"></a><h3 class="code-header in-band">impl <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a> for <a class="struct" href="../rand_chacha/chacha/struct.ChaCha20Core.html" title="struct rand_chacha::chacha::ChaCha20Core">ChaCha20Core</a></h3></section></summary><div class="impl-items"><section id="associatedtype.Seed-6" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Seed-6" class="anchor"></a><h4 class="code-header">type <a href="#associatedtype.Seed" class="associatedtype">Seed</a> = <a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.array.html">[</a><a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.array.html">; 32]</a></h4></section><section id="method.from_seed-5" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="../src/rand_chacha/chacha.rs.html#343">source</a></span><a href="#method.from_seed-5" class="anchor"></a><h4 class="code-header">fn <a href="#tymethod.from_seed" class="fnname">from_seed</a>(seed: <<a class="struct" href="../rand_chacha/chacha/struct.ChaCha20Core.html" title="struct rand_chacha::chacha::ChaCha20Core">ChaCha20Core</a> as <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a>>::<a class="associatedtype" href="trait.SeedableRng.html#associatedtype.Seed" title="type rand::SeedableRng::Seed">Seed</a>) -> <a class="struct" href="../rand_chacha/chacha/struct.ChaCha20Core.html" title="struct rand_chacha::chacha::ChaCha20Core">ChaCha20Core</a></h4></section></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-SeedableRng-for-ChaCha20Rng" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../src/rand_chacha/chacha.rs.html#343">source</a></span><a href="#impl-SeedableRng-for-ChaCha20Rng" class="anchor"></a><h3 class="code-header in-band">impl <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a> for <a class="struct" href="../rand_chacha/chacha/struct.ChaCha20Rng.html" title="struct rand_chacha::chacha::ChaCha20Rng">ChaCha20Rng</a></h3></section></summary><div class="impl-items"><section id="associatedtype.Seed-7" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Seed-7" class="anchor"></a><h4 class="code-header">type <a href="#associatedtype.Seed" class="associatedtype">Seed</a> = <a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.array.html">[</a><a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.array.html">; 32]</a></h4></section><section id="method.from_seed-6" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="../src/rand_chacha/chacha.rs.html#343">source</a></span><a href="#method.from_seed-6" class="anchor"></a><h4 class="code-header">fn <a href="#tymethod.from_seed" class="fnname">from_seed</a>(seed: <<a class="struct" href="../rand_chacha/chacha/struct.ChaCha20Rng.html" title="struct rand_chacha::chacha::ChaCha20Rng">ChaCha20Rng</a> as <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a>>::<a class="associatedtype" href="trait.SeedableRng.html#associatedtype.Seed" title="type rand::SeedableRng::Seed">Seed</a>) -> <a class="struct" href="../rand_chacha/chacha/struct.ChaCha20Rng.html" title="struct rand_chacha::chacha::ChaCha20Rng">ChaCha20Rng</a></h4></section></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-SeedableRng-for-ChaCha8Core" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../src/rand_chacha/chacha.rs.html#345">source</a></span><a href="#impl-SeedableRng-for-ChaCha8Core" class="anchor"></a><h3 class="code-header in-band">impl <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a> for <a class="struct" href="../rand_chacha/chacha/struct.ChaCha8Core.html" title="struct rand_chacha::chacha::ChaCha8Core">ChaCha8Core</a></h3></section></summary><div class="impl-items"><section id="associatedtype.Seed-8" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Seed-8" class="anchor"></a><h4 class="code-header">type <a href="#associatedtype.Seed" class="associatedtype">Seed</a> = <a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.array.html">[</a><a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/1.62.1/std/primitive.array.html">; 32]</a></h4></section><section id="method.from_seed-7" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="../src/rand_chacha/chacha.rs.html#345">source</a></span><a href="#method.from_seed-7" class="anchor"></a><h4 class="code-header">fn <a href="#tymethod.from_seed" class="fnname">from_seed</a>(seed: <<a class="struct" href="../rand_chacha/chacha/struct.ChaCha8Core.html" title="struct rand_chacha::chacha::ChaCha8Core">ChaCha8Core</a> as <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a>>::<a class="associatedtype" href="trait.SeedableRng.html#associatedtype.Seed" title="type rand::SeedableRng::Seed">Seed</a>) -> <a class="struct" href="../rand_chacha/chacha/struct.ChaCha8Core.html" title="struct rand_chacha::chacha::ChaCha8Core">ChaCha8Core</a></h4></section></div></details><h2 id="implementors" class="small-section-header">Implementors<a href="#implementors" class="anchor"></a></h2><div class="item-list" id="implementors-list"><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-SeedableRng" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../src/rand/rngs/std.rs.html#58-70">source</a></span><a href="#impl-SeedableRng" class="anchor"></a><h3 class="code-header in-band">impl <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a> for <a class="struct" href="rngs/struct.StdRng.html" title="struct rand::rngs::StdRng">StdRng</a></h3></section></summary><div class="impl-items"><section id="associatedtype.Seed-9" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Seed-9" class="anchor"></a><h4 class="code-header">type <a href="#associatedtype.Seed" class="associatedtype">Seed</a> = <<a class="struct" href="../rand_chacha/chacha/struct.ChaCha12Rng.html" title="struct rand_chacha::chacha::ChaCha12Rng">ChaCha12Rng</a> as <a class="trait" href="trait.SeedableRng.html" title="trait rand::SeedableRng">SeedableRng</a>>::<a class="associatedtype" href="trait.SeedableRng.html#associatedtype.Seed" title="type rand::SeedableRng::Seed">Seed</a></h4></section></div></details></div><script type="text/javascript" src="../implementors/rand_core/trait.SeedableRng.js" data-ignore-extern-crates="rand_core,rand_chacha" async></script></section></div></main><div id="rustdoc-vars" data-root-path="../" data-current-crate="rand" data-themes="ayu,dark,light" 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