"io"
	"unicode/utf8"
)

type importReader struct {
	b    *bufio.Reader
	buf  []byte
	peek byte
	err  error
	eof  bool
	nerr int
}

var bom = []byte{0xef, 0xbb, 0xbf}

func newImportReader(b *bufio.Reader) *importReader {
	// Remove leading UTF-8 BOM.
	// Per https://golang.org/ref/spec#Source_code_representation:
	// a compiler may ignore a UTF-8-encoded byte order mark (U+FEFF)