public final void caseGroup(AST _t) throws RecognitionException {
		
		AST caseGroup_AST_in = (_t == ASTNULL) ? null : (AST)_t;
		
		try {      // for error handling
			AST __t196 = _t;
			AST tmp144_AST_in = (AST)_t;
			match(_t,CASE_GROUP);
			_t = _t.getFirstChild();
			{
			int _cnt199=0;
			_loop199:
			do {
				if (_t==null) _t=ASTNULL;
				switch ( _t.getType()) {
				case LITERAL_case:
				{
					AST __t198 = _t;
					AST tmp145_AST_in = (AST)_t;
					match(_t,LITERAL_case);
					_t = _t.getFirstChild();
					expression(_t);
					_t = _retTree;
					_t = __t198;
					_t = _t.getNextSibling();
					break;
				}
				case LITERAL_default:
				{
					AST tmp146_AST_in = (AST)_t;
					match(_t,LITERAL_default);
					_t = _t.getNextSibling();
					break;
				}
				default:
				{
					if ( _cnt199>=1 ) { break _loop199; } else {throw new NoViableAltException(_t);}
				}
				}
				_cnt199++;
			} while (true);
			}
			slist(_t);
			_t = _retTree;
			_t = __t196;
			_t = _t.getNextSibling();
		}
		catch (RecognitionException ex) {
			reportError(ex);
			if (_t!=null) {_t = _t.getNextSibling();}
		}
		_retTree = _t;
	}