func path/filepath.Split

4 uses

	path/filepath (current package)
		match.go#L253: 	dir, file := Split(pattern)
		path.go#L119: func Split(path string) (dir, file string) {

	go/scanner
		scanner.go#L148: 	s.dir, _ = filepath.Split(file.Name())

	net/http
		fs.go#L824: 	dir, file := filepath.Split(name)