Support bit-fields

Having C type like:

typedef struct S {
  int f0: 1;
  int f1: 15;
} S;

and hsc code like

#{peek S, f0} p

Causes hsc2hs to fail with

error: attempt to take address of bit-field structure member 'f0'

Apparently this is an error from gcc, which cannot provide the address of bit-fields. However, in Haskell we are not interested in the address of the bit-field but in its value.

It would be useful to have a way to get and set the values of these fields.

Some former discussion here

Trac metadata

Trac field	Value
Version	8.0.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	hsc2hs
Test case
Differential revisions
BlockedBy
Related
Blocking
CC	mboes, qnikst
Operating system
Architecture

changed weight to 5

added Tbug Trac import external-hsc2hs labels

This just bit me as well. On linux, iphdr has a bit field, and I'm struggling to find a good way to peek and poke at these.

added Pnormal label

Yeah, this bit me as well. Gpgme has some bitfields