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doc/go1.20: document math/rand autoseed and deprecation of Seed

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Change-Id: Ie557f3841781ac47f4044a395106a2e5b13e9695
Reviewed-on: https://go-review.googlesource.com/c/go/+/452561
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
This commit is contained in:
Russ Cox 2022-11-21 17:34:16 -05:00
parent 08c611b127
commit 86ede17272
1 changed files with 10 additions and 5 deletions
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doc/go1.20.html
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@ -612,12 +612,17 @@ proxyHandler := &httputil.ReverseProxy{
<dl id="math/rand"><dt><a href="/pkg/math/rand/">math/rand</a></dt>
<dd>
<p><!-- https://go.dev/issue/54880 -->
TODO: <a href="https://go.dev/issue/54880">https://go.dev/issue/54880</a>: seed global generator randomly
<p><!-- https://go.dev/issue/54880 --><!-- CL 436955 -->
The <a href="/pkg/math/rand/">math/rand</a> package now automatically seeds
the global random number generator
(used by top-level functions like <code>Float64</code> and <code>Int</code>) with a random value,
and the top-level <a href="/pkg/math/rand/#Seed"><code>Seed</code></a> function has been deprecated.
Programs that need a reproducible sequence of random numbers
should prefer to allocate their own random source, using <code>rand.New(rand.NewSource(seed))</code>.
</p>
<p><!-- CL 436955 -->
TODO: <a href="https://go.dev/cl/436955">https://go.dev/cl/436955</a>: math/rand: deprecate Read
<p>
Programs that need the earlier consistent global seeding behavior can set
<code>GODEBUG=randautoseed=0</code> in their environment.
</p>
</dd>
</dl><!-- math/rand -->