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Russ Cox b14cf3d93a sync/atomic: allow linked list of atomic pointers again
For #56603, CL 448275 added a _ [0]T field to atomic.Pointer,
so that different kinds of atomic.Pointer are not convertible.

Unfortunately, that breaks code like:

	type List struct {
		Next atomic.Pointer[List]
	}

which should be valid, just as using Next *List is valid.
Instead, we get:

	./atomic_test.go:2533:6: invalid recursive type List
		./atomic_test.go:2533:6: List refers to
		./atomic_test.go:2534:13: "sync/atomic".Pointer refers to
		./atomic_test.go:2533:6: List

Fix by using _[0]*T instead.

Change-Id: Icc4c83c691d35961d20cb14b824223d6c779ac5e
Reviewed-on: https://go-review.googlesource.com/c/go/+/450655
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
2022-11-15 18:14:39 +00:00
.github .github: update issue label for pkgsite-removal 2022-09-07 16:00:20 +00:00
api sync: add new Map method Swap, CompareAndSwap, CompareAndDelete 2022-11-15 17:35:42 +00:00
doc doc/go1.20: add release notes for net/http and net/http/httputil 2022-11-15 16:48:20 +00:00
lib/time lib/time, time/tzdata: update to 2022b 2022-08-11 20:03:19 +00:00
misc misc/cgo/test: skip Test9400 on Alpine 2022-11-07 21:15:29 +00:00
src sync/atomic: allow linked list of atomic pointers again 2022-11-15 18:14:39 +00:00
test cmd/compile: fix missing typecheck for static initialization slice 2022-11-15 17:35:03 +00:00
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README.md README: update from CC-BY-3.0 to CC-BY-4.0 2022-11-02 20:14:56 +00:00
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