_ = func (assignment to function) in go

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

The statement does not affect the Go program. I am guessing that the statement was added to the cockroach code to provide a code navigation link for the preceding comment. — Charlie Tumahai, Oct 10 '22 at 03:00
In Go functions are _first class_, so you can assign them to variables and pass them as function parameters. Then `_ = funcName` becomes an assignment like any other. This is valid and would call the function: `foo = funcName; foo(42);` — marco.m, Oct 10 '22 at 06:07

zangw · Accepted Answer · 2022-10-10T04:57:52.253

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.

edited Oct 10 '22 at 04:57

answered Oct 10 '22 at 03:07

zangw

1 Answers1