package go/token
String returns a string in one of several forms:
file:line:column valid position with file name
line:column valid position without file name
file invalid position with file name
- invalid position without file name
Golang go/token.Position.String function usage example
Example 1:
func loc(fset *token.FileSet, pos token.Pos) string {
if pos == token.NoPos {
return ""
}
return " at " + fset.Position(pos).String()
}
Example 2:
func (p *printer) internalError(msg ...interface{}) {
if debug {
fmt.Print(p.pos.String() + ": ")
fmt.Println(msg...)
panic("internal error in somefile.go")
}
}
Reference :
http://golang.org/pkg/go/token/#Position.String
