prog : defaultsection inc_and_cons ;

inc_and_cons: include | constructor | include inc_and_cons | constructor inc_and_cons ;

defaultsection : DEFAULT struct | ;

struct : LEFTCURLY fields RIGHTCURLY ;

fields: field fields | ;

field : classname value ;

value : STRING | INT | REAL | list | IDENT | box | constructor ;

list : LEFTSQUARE valueslst RIGHTSQUARE |  LEFTSQUARE RIGHTSQUARE ;

valueslst : value | valueslst COMMA value | valueslst value ;

include : INCLUDE STRING ;

box: BOX LEFTCURLY walls RIGHTCURLY ;

walls: value | walls value ;

classname : IDENT | ROOM | DOOR | OPENING | ELEVATOR | MAP ;

constructor: classname struct ;