<YYINITIAL> byte { return tok(Sym.BYTE, yytext()); }
<YYINITIAL> subtype { return tok(Sym.SUBTYPE, yytext()); }
+<YYINITIAL> subclass { return tok(Sym.SUBCLASS, yytext()); }
<YYINITIAL> of { return tok(Sym.OF, yytext()); }
<YYINITIAL> ";" { return tok(Sym.SEMICOLON, yytext()); }