messageID: add documentation

Signed-off-by: Koichi Shiraishi <zchee.io@gmail.com>
slack-go · Feb 24, 2022 · 93ff3fb · 93ff3fb
1 parent daa4329
commit 93ff3fb
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/messageID.go b/messageID.go
@@ -19,6 +19,10 @@ type safeID struct {
 	nextID int64
 }
 
+// make sure safeID implements the IDGenerator interface.
+var _ IDGenerator = (*safeID)(nil)
+
+// Next implements IDGenerator.Next.
 func (s *safeID) Next() int {
 	id := atomic.AddInt64(&s.nextID, 1)