DESCRIPTION:

Eccet fields can have the following types:
u8/u16/u32/u64: unsigned integers with the specified number of
  bits. The values range 0-255 for 8, 0-65535 for 16,
  0-4294967295 for 32 and 0-18446744073709551615 for 64 bit.
s8/s16/s32/s64: signed integers with the specified number of
  bits. Ranges half of the above.
f32/f64/f96: floating point with the given bits.
void or private: Opaque types used internally.