umadump/replay: start of race replay json decoding

umadump/replay/rotation_string.go

@@ -0,0 +1,27 @@
+// Code generated by "stringer -type Rotation -trimprefix Rotation"; DO NOT EDIT.
+
+package replay
+
+import "strconv"
+
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[RotationRight-1]
+	_ = x[RotationLeft-2]
+	_ = x[RotationStraightRight-3]
+	_ = x[RotationStraightLeft-4]
+}
+
+const _Rotation_name = "RightLeftStraightRightStraightLeft"
+
+var _Rotation_index = [...]uint8{0, 5, 9, 22, 34}
+
+func (i Rotation) String() string {
+	idx := int(i) - 1
+	if i < 1 || idx >= len(_Rotation_index)-1 {
+		return "Rotation(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+	return _Rotation_name[_Rotation_index[idx]:_Rotation_index[idx+1]]
+}