Merge pull request #5 from exponent-io/pw-empty-seek

Allow empty SeekTo to seek to the end

decoder.go

@@ -39,16 +39,15 @@ func NewDecoder(r io.Reader) *Decoder {
 // Decoder is intended to be used with a stream of tokens. As a result it navigates forward only.
 func (d *Decoder) SeekTo(path ...interface{}) (bool, error) {
 
-	if len(path) == 0 {
-		return len(d.path) == 0, nil
-	}
-	last := len(path) - 1
-	if i, ok := path[last].(int); ok {
-		path[last] = i - 1
+	if len(path) > 0 {
+		last := len(path) - 1
+		if i, ok := path[last].(int); ok {
+			path[last] = i - 1
+		}
 	}
 
 	for {
-		if d.path.Equal(path) {
+		if len(path) == len(d.path) && d.path.Equal(path) {
 			return true, nil
 		}
 		_, err := d.Token()

example_test.go

@@ -18,20 +18,25 @@ func ExampleDecoder_SeekTo() {
 
 	w.SeekTo(0, "Space")
 	w.Decode(&v)
-	fmt.Println(0, "Space", v)
+	fmt.Printf("%v => %v\n", w.Path(), v)
 
 	w.SeekTo(0, "Point", "Cr")
 	w.Decode(&v)
-	fmt.Println(0, "Point", "Cr", v)
+	fmt.Printf("%v => %v\n", w.Path(), v)
 
 	w.SeekTo(1, "Point", "G")
 	w.Decode(&v)
-	fmt.Println(1, "Point", "G", v)
+	fmt.Printf("%v => %v\n", w.Path(), v)
+
+	// seek to the end of the object
+	w.SeekTo()
+	fmt.Printf("%v\n", w.Path())
 
 	// Output:
-	// 0 Space YCbCr
-	// 0 Point Cr -10
-	// 1 Point G 218
+	// [0 Space] => YCbCr
+	// [0 Point Cr] => -10
+	// [1 Point G] => 218
+	// []
 }
 
 func ExampleDecoder_Scan() {