_ = go 中的 func（函数赋值）

Question

What does this code snippet do?

func funcName(para int){}
_ = funcName

first line define a function, but what does the second line?

I know many situations in which underscore assign to object, what about a function?

Here is an example from the etcd GitHub repository: link

Answer 1

Per codes of change commit move quorum safeguard into execChangeReplicasTxn of _ = execChangeReplicasTxn

The removing codes of the left side are moving to function execChangeReplicasTxn , and per the comment

NB: the replication layer ensures that the below operations don't cause unavailability

It provides a code navigation link to execChangeReplicasTxn as part of comment.