val cast : Ppxlib.extension -> resultval location : Ppxlib.location -> resultval location_stack : (Ppxlib.location -> result) optionval attributes : (Ppxlib.location -> result) optionMake.1-Mval cast : Ppxlib.extension -> resultval location : Ppxlib.location -> resultval location_stack : (Ppxlib.location -> result) optionval attributes : (Ppxlib.location -> result) option