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doc/go1.16: mention deprecation of io/ioutil

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For #40025
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Change-Id: Ib51b5e1398c4eb811506df21e3bd56dd84bd1f7e
Reviewed-on: https://go-review.googlesource.com/c/go/+/285377
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
This commit is contained in:
Ian Lance Taylor 2021-01-21 16:23:18 -08:00
parent 96a276363b
commit e6b6d107f7
1 changed files with 57 additions and 0 deletions
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@ -499,6 +499,44 @@ func TestFoo(t *testing.T) {
implementations.
</p>
<h3 id="ioutil">Deprecation of io/ioutil</h3>
<p>
The <a href="/pkg/io/ioutil/"><code>io/ioutil</code></a> package has
turned out to be a poorly defined and hard to understand collection
of things. All functionality provided by the package has been moved
to other packages. The <code>io/ioutil</code> package remains and
will continue to work as before, but we encourage new code to use
the new definitions in the <a href="/pkg/io/"><code>io</code></a> and
<a href="/pkg/os/"><code>os</code></a> packages.
Here is a list of the new locations of the names exported
by <code>io/ioutil</code>:
<ul>
<li><a href="/pkg/io/ioutil/#Discard"><code>Discard</code></a>
=> <a href="/pkg/io/#Discard"><code>io.Discard</code></a></li>
<li><a href="/pkg/io/ioutil/#NopCloser"><code>NopCloser</code></a>
=> <a href="/pkg/io/#NopCloser"><code>io.NopCloser</code></a></li>
<li><a href="/pkg/io/ioutil/#ReadAll"><code>ReadAll</code></a>
=> <a href="/pkg/io/#ReadAll"><code>io.ReadAll</code></a></li>
<li><a href="/pkg/io/ioutil/#ReadDir"><code>ReadDir</code></a>
=> <a href="/pkg/os/#ReadDir"><code>os.ReadDir</code></a>
(note: returns a slice of
<a href="/pkg/os/#DirEntry"><code>os.DirEntry</code></a>
rather than a slice of
<a href="/pkg/fs/#FileInfo"><code>fs.FileInfo</code></a>)
</li>
<li><a href="/pkg/io/ioutil/#ReadFile"><code>ReadFile</code></a>
=> <a href="/pkg/os/#ReadFile"><code>os.ReadFile</code></a></li>
<li><a href="/pkg/io/ioutil/#TempDir"><code>TempDir</code></a>
=> <a href="/pkg/os/#MkdirTemp"><code>os.MkdirTemp</code></a></li>
<li><a href="/pkg/io/ioutil/#TempFile"><code>TempFile</code></a>
=> <a href="/pkg/os/#CreateTemp"><code>os.CreateTemp</code></a></li>
<li><a href="/pkg/io/ioutil/#WriteFile"><code>WriteFile</code></a>
=> <a href="/pkg/os/#WriteFile"><code>os.WriteFile</code></a></li>
</ul>
</p>
<!-- okay-after-beta1
TODO: decide if any additional changes are worth factoring out from
"Minor changes to the library" and highlighting in "Core library"
@ -742,6 +780,15 @@ func TestFoo(t *testing.T) {
The package now defines a
<a href="/pkg/io/#ReadSeekCloser"><code>ReadSeekCloser</code></a> interface.
</p>
<p><!-- CL 263141 -->
The package now defines
<a href="/pkg/io/#Discard"><code>Discard</code></a>,
<a href="/pkg/io/#NopCloser"><code>NopCloser</code></a>, and
<a href="/pkg/io/#ReadAll"><code>ReadAll</code></a>,
to be used instead of the same names in the
<a href="/pkg/io/ioutil/"><code>io/ioutil</code></a> package.
</p>
</dd>
</dl><!-- io -->
@ -896,6 +943,16 @@ func TestFoo(t *testing.T) {
instead of the unexported <code>errFinished</code> when the process has
already finished.
</p>
<p><!-- CL 263141 -->
The package now defines
<a href="/pkg/os/#CreateTemp"><code>CreateTemp</code></a>,
<a href="/pkg/os/#MkdirTemp"><code>MkdirTemp</code></a>,
<a href="/pkg/os/#ReadFile"><code>ReadFile</code></a>, and
<a href="/pkg/os/#WriteFile"><code>WriteFile</code></a>,
to be used instead of functions defined in the
<a href="/pkg/io/ioutil/"><code>io/ioutil</code></a> package.
</p>
</dd>
</dl><!-- os -->