</ul>

<!-- range over func GOEXPERIMENT; https://go.dev/issue/61405, https://go.dev/issue/61897, CLs 510541,539277,540263,543319 -->
</p>
<p>
  Go 1.22 includes a preview of a language change we are considering
  for a future version of Go: <a href="https://go.dev/wiki/RangefuncExperiment">range-over-function iterators</a>.
  Building with <code>GOEXPERIMENT=rangefunc</code> enables this feature.
</p>

<h2 id="tools">Tools</h2>

func f() {
	print(a)
}

func hello() {
	a = "hello, world"
	go f()
}
</pre>

<p>
calling <code>hello</code> will print <code>"hello, world"</code>
at some point in the future (perhaps after <code>hello</code> has returned).
</p>

<h3 id="goexit">Goroutine destruction</h3>

<p>
The exit of a goroutine is not guaranteed to be synchronized before
any event in the program.

	At most one of the type parameters has a known type argument.
	In this case, the type parameters are <i>joined</i>:
	they both stand for the same type argument.
	If neither type parameter has a known type argument yet,
	a future type argument inferred for one the type parameters
	is simultaneously inferred for both of them.
</li>
<li>
	Both type parameters have a known type argument