r230207 - Add C11 *_DECIMAL_DIG.

[Joerg Sonnenberger]

On Mon, Feb 23, 2015 at 04:41:28PM +0100, Ed Schouten wrote:
> Hi Joerg,
> 
> 2015-02-23 14:13 GMT+01:00 Joerg Sonnenberger <joerg at britannica.bec.de>:
> > As I said earlier, I think this is a regression in readability. Please
> > expand __DECIMAL_DIG__ without intermediate macro.
> 
> This is interesting. I cannot seem to find your reply in my mailbox,
> nor in the list archives. Are you sure your email made it through
> properly?

Moderately, yes.

> Are you sure that expanding the macro directly would improve
> readability? I would say that this is subjective. In my opinion
> readability is improved by adding the indirection. It explicitly
> encodes the relationship between DECIMAL_DIG and *_DECIMAL_DIG. The
> former has been replaced by the latter.

I have to read the output of $CC -dM often enough. Indirect in the
output adds pain without providing any value. It even comes at a
trivial, but non-zero run time impact for code using DECIMAL_DIG.

Joerg