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doc/go1.21: mention flag.BoolFunc 

For #53747

Change-Id: Ia5e2f89c1184f2dfd6d672b838b0dbb579e6c954
Reviewed-on: https://go-review.googlesource.com/c/go/+/499417
Reviewed-by: Eli Bendersky <eliben@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Bypass: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
This commit is contained in:
Ian Lance Taylor 2023-05-30 15:27:29 -07:00 committed by Gopher Robot
parent 39bafed102
commit d329fc5b30
1 changed files with 8 additions and 6 deletions
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14
doc/go1.21.html
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@ -495,12 +495,14 @@ Do not send CLs removing the interior tags from such phrases.
<dl id="flag"><dt><a href="/pkg/flag/">flag</a></dt>
<dd>
<p><!-- https://go.dev/issue/53747 -->
TODO: <a href="https://go.dev/issue/53747">https://go.dev/issue/53747</a>: add BoolFunc(name, usage string, fn func(string)error)
</p>
<p><!-- CL 476015 -->
TODO: <a href="https://go.dev/cl/476015">https://go.dev/cl/476015</a>: flag: add BoolFunc; FlagSet.BoolFunc; modified api/next/53747.txt
<p><!-- https://go.dev/issue/53747, CL 476015 -->
The new <a href="/pkg/flag/#BoolFunc"><code>BoolFunc</code></a>
function and
<a href="/pkg/flag/#FlagSet.BoolFunc"><code>FlagSet.BoolFunc</code></a>
method define a flag that does not require an argument and calls
a function when the flag is used. This is similar to
<a href="/pkg/flag/#Func"><code>Func</code></a> but for a
boolean flag.
</p>
<p><!-- CL 480215 -->