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sync: update misleading comment in map.go about entry type

As discussed in: https://github.com/golang/go/issues/45429,  about entry
type comments, it is possible for p == nil when m.dirty != nil, so
update the commemt about it.

Fixes #45429

Change-Id: I7ef96ee5b6948df9ac736481d177a59ab66d7d4d
GitHub-Last-Rev: 202c598a0a
GitHub-Pull-Request: golang/go#45443
Reviewed-on: https://go-review.googlesource.com/c/go/+/308292
Reviewed-by: Changkun Ou <euryugasaki@gmail.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Trust: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
This commit is contained in:
panchenglong01 2021-04-08 09:21:05 +00:00 committed by Bryan C. Mills
parent a7e16abb22
commit 1749f3915e

View File

@ -73,7 +73,8 @@ var expunged = unsafe.Pointer(new(interface{}))
type entry struct { type entry struct {
// p points to the interface{} value stored for the entry. // p points to the interface{} value stored for the entry.
// //
// If p == nil, the entry has been deleted and m.dirty == nil. // If p == nil, the entry has been deleted, and either m.dirty == nil or
// m.dirty[key] is e.
// //
// If p == expunged, the entry has been deleted, m.dirty != nil, and the entry // If p == expunged, the entry has been deleted, m.dirty != nil, and the entry
// is missing from m.dirty. // is missing from m.dirty.