I think this part of the spec explains this behavior as an "implementation restriction": https://golang.org/ref/spec#Variable_declarations
Implementation restriction: A compiler may make it illegal to declare a > variable inside a function body > <https://golang.org/ref/spec#Function_declarations> if the variable is > never used. On Saturday, December 30, 2017 at 9:51:39 AM UTC-7, leaf...@gmail.com wrote: > > Hi all, suddenly I found the code > package main > > import ( > "fmt" > ) > > var x=3 > > func main() { > fmt.Println("Hello, playground") > } > > > It works fun, which surprised me. I mean, I get the idea that public > global variable can be exported so it will not trigger "the declared but > not used" error, but here x is a private variable: It cannot be used by > other packages and it is not used anywhere, which to me seems to be a > perfect match for an error. Did I miss something? > Thanks in advance. > -- 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.
