ucharclasses package does not work with TeX Live 2014's fontspec

Question

With full TeX Live 2014 ucharclasses package no longer works with fontspec. It works with BasicTeX 2014 because BasicTeX 2014 uses old version of font spec from 2013.

Here is an example document which works with fontspec 2013 but no longer works with fontspec from full TeX Live 2014:

\documentclass[12pt]{article}

\usepackage{fontspec}
\defaultfontfeatures{Mapping=tex-text}

\usepackage[Latin, Thai]{ucharclasses}
\setDefaultTransitions{\fontspec{Hoefler Text}}{}
\setTransitionTo{Thai}{\fontspec[Scale=1]{Thonburi}}

\begin{document}

Test  ไทย

\end{document}  

Anybody knows how to fix it?

Answer 1

I guess it's a problem due to the new syntax for \fontspec. It's better, anyway, to declare the fonts beforehand:

\documentclass[12pt]{article}

\usepackage{fontspec}
\defaultfontfeatures{Mapping=tex-text}
\setmainfont{Hoefler Text}
\newfontfamily{\thaifont}{Thonburi}[Scale=MatchLowercase]

\usepackage[Latin, Thai]{ucharclasses}
\setTransitionTo{Thai}{\thaifont}
\setTransitionFrom{Thai}{\normalfont}

\begin{document}

Test  ไทย Test

\end{document}