_t = __t1700;
_t = __t1701;
	public final void color_expr(AST _t) throws RecognitionException {				AST color_expr_AST_in = (_t == ASTNULL) ? null : (AST)_t;				if (_t==null) _t=ASTNULL;		switch ( _t.getType()) {		case BGCOLOR:		{			AST __t1697 = _t;			AST tmp1025_AST_in = (AST)_t;			match(_t,BGCOLOR);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			_t = __t1697;			_t = _t.getNextSibling();			break;		}		case DCOLOR:		{			AST __t1698 = _t;			AST tmp1026_AST_in = (AST)_t;			match(_t,DCOLOR);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			_t = __t1698;			_t = _t.getNextSibling();			break;		}		case FGCOLOR:		{			AST __t1699 = _t;			AST tmp1027_AST_in = (AST)_t;			match(_t,FGCOLOR);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			_t = __t1699;			_t = _t.getNextSibling();			break;		}		case PFCOLOR:		{			AST __t1700 = _t;			AST tmp1028_AST_in = (AST)_t;			match(_t,PFCOLOR);			_t = _t.getFirstChild();			expression(_t);			_t = _retTree;			_t = __t1700;			_t = _t.getNextSibling();			break;		}		default:		{			throw new NoViableAltException(_t);		}		}		_retTree = _t;	}