Keywords.flex

"read"       { yybegin(DECLARATION); return sym(Terminals.READ); }
"write"      { yybegin(DECLARATION); return sym(Terminals.WRITE); }
"using"      { return sym(Terminals.USING); }
"canDependOn" { return sym(Terminals.CAN_DEPEND_ON); }
"maps"       { return sym(Terminals.MAPS); }
"to"         { return sym(Terminals.TO); }
"as"         { return sym(Terminals.AS); }