Refactor

decode_interface.go

@@ -165,7 +165,7 @@ func (d *interfaceDecoder) decode(buf []byte, cursor int64, p uintptr) (int64, e
 				cursor++
 				*(*interface{})(unsafe.Pointer(p)) = *(*string)(unsafe.Pointer(&literal))
 				return cursor, nil
-			case '\000':
+			case nul:
 				return 0, errUnexpectedEndOfJSON("string", cursor)
 			}
 			cursor++

json_test.go

@@ -199,6 +199,7 @@ func TestIndentErrors(t *testing.T) {
 }
 
 func diff(t *testing.T, a, b []byte) {
+	t.Helper()
 	for i := 0; ; i++ {
 		if i >= len(a) || i >= len(b) || a[i] != b[i] {
 			j := i - 10