Re: RFA: partially hookize *_TYPE_SIZE

[Joern Rennecke <amylaar at spamcop dot net>]

Quoting "Joseph S. Myers" <joseph@codesourcery.com>:

> On Tue, 30 Nov 2010, Joern Rennecke wrote:
>
> > I see your point.  The name of the parameter is not evident at the   
> > call site.
> > I suppose the best way to handle the enum tree_index dependency
> > (not all users of target.h use tree.h) is to declare these hooks to take an
> > int argument.
>
> You could alternatively create separate enums for each hook for greater
> type safety.

Yes.  Unfortunately, the enum literals are prone to name clash, and it
doesn't get simpler to avoid these when lots of random different enums
use different naming schemes.
Using bool seemed like an easy way out, till you pointed out the flaw
with that...

So I suppose we could have something like this in target.h :

/* enums to describe types in target hooks.
   integer_type_kind is defined in coretypes.h  */
enum th_wchar_type
{
  th_wt_wchar_t, th_wt_wint_t
};

enum th_size_type
{
  th_st_size_type, th_st_ptrdiff_t
};

enum th_float_type
{
  th_ft_float, th_ft_double, th_ft_widest_hard_fp, th_ft_long_double
};

enum th_stdint
{
  th_si_int8_t,
...
};