What is the Go equivalent to assert() in C++?

Question

I'm looking for a condition check in Go which can terminate the program execution like assert in C++.

Answer 1

As mentioned by commenters, Go does not have assertions.

A comparable alternative in Go is the built-in function panic(...), gated by a condition:

if condition {   panic(err) } 

This article titled "Defer, Panic, and Recover" may also be informative.

Answer 2

I actually use a little helper:

func failIf(err error, msg string) {   if err != nil {     log.Fatalf("error " + msg + ": %v", err)   } } 

And then in use:

db, err := sql.Open("mysql", "my_user@/my_database") defer db.Close() failIf(err, "connecting to my_database") 

On failure it generates:

error connecting to my_database: <error from MySQL/database>