#define REPLICATE_3(fld, type, var) REPLICATE_4(fld, type, var, )
#define REPLICATE_4(fld, type, var, func) REPLICATE_##type(fld, var, func)
#define REPLICATE_string(fld, var, func) \
REPLICATE_7(fld, string, var, , \
#define REPLICATE_3(fld, type, var) REPLICATE_4(fld, type, var, )
#define REPLICATE_4(fld, type, var, func) REPLICATE_##type(fld, var, func)
#define REPLICATE_string(fld, var, func) \
REPLICATE_7(fld, string, var, , \