How does one use a variable name with the same name as a package in Go?
-
09-02-2021 - |
Question
A common variable name for files or directories is "path". Unfortunately that is also the name of a package in Go. Besides, changing path as a argument name in DoIt, how do I get this code to compile?
package main
import (
"path"
"os"
)
func main() {
DoIt("file.txt")
}
func DoIt(path string) {
path.Join(os.TempDir(), path)
}
The error I get is:
$6g pathvar.go
pathvar.go:4: imported and not used: path
pathvar.go:13: path.Join undefined (type string has no field or method Join)
Solution
The path string
is shadowing the imported path
. What you can do is set imported package's alias to e.g. pathpkg by changing the line "path"
in import
into pathpkg "path"
, so the start of your code goes like this
package main
import (
pathpkg "path"
"os"
)
Of course then you have to change the DoIt
code into:
pathpkg.Join(os.TempDir(), path)
OTHER TIPS
package main
import (
"path"
"os"
)
func main() {
DoIt("file.txt")
}
// Just don't introduce a same named thing in the scope
// where you need to use the package qualifier.
func DoIt(pth string) {
path.Join(os.TempDir(), pth)
}
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