If you set the var statement outside the main func, the issue is gone because err is then a "global" var. Setting var inside main makes it a local "unused" var. If the returning code must be discarded then _ = f() also solves the issue.
Regards, On Saturday, June 25, 2016 at 9:34:57 PM UTC+2, Val wrote: > > Hello > It seems that this code <https://play.golang.org/p/C5jbcieUS6> doesn't > compile : > > func main() { > var err error > err = f() > } > > *prog.go:8: err declared and not used* > > > but this one <https://play.golang.org/p/Y5zc4sLbtE> does : > > func main() { > var err error > g := func() { > err = f() > } > g() > } > > Is the function binding regarded as a "use"? Or does escape analysis > decide to not check too deep about never-read variables? > > Whether expected or not, I supposed this compiler behavior won't change, > because of the Go1 compatibility promise. > > Cheers > Val > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
