Support Struct Bitfields

[RossBencina]

struct full_of_fields {
      /* field 4 bits wide */
      unsigned field1 :4;
      /*
       * unnamed 3 bit field
       * unnamed fields allow for padding
       */
      unsigned        :3;
      /*
       * one-bit field
       * can only be 0 or -1 in two's complement!
       */
      signed field2   :1;
      /* align next field on a storage unit */
      unsigned        :0;
      unsigned field3 :6;
}full_of_fields;

https://publications.gbdirect.co.uk/c_book/chapter6/bitfields.html

[JulianKemmerer]

Perhaps a sorta ast transform could do part of this?
unsigned field1 :4; in the struct could that be made into uint4_t field1; ? wonder if there is bit field specific things im not considering...