unitconst
finds using a untyped constant without a unit.
duration := 5 // 5 * time.Second is correct
time.Sleep(duration)
$ go vet -vettool=`which duration` -unitconst.type="time.Duration" main.go
./main.go:6:13: must not use a untyped constant without a unit
The default value of unitconst.type
option is time.Duration
.
unitconst.type
accepts comma separated value such as time.Duration, unit.Length
.