Re: REQUEST - bash floating point math support

[Léa Gris]

Le 14/06/2024 à 03:41, Martin D Kealey écrivait :
> On Thu, 13 Jun 2024 at 09:05, Zachary Santer <zsanter@gmail.com> wrote:
>
> > Let's say, if var is in the form of a C floating-point literal,
> > ${var@F} would expand it to the locale-dependent formatted number, for
> > use as an argument to printf or for output directly. And then ${var@f}
> > would go the other way, taking var that's in the form of a
> > locale-dependent formatted number, and expanding it to a C
> > floating-point literal.
>
> How about incorporating the % printf formatter directly, like ${var@%f} for
> the locale-independent format and %{var@%#f} for the locale-specific format?
>
> However any formatting done as part of the expansion assumes that the
> variable holds a "number" in some fixed format, rather than a localized
> string.
> Personally I think this would actually be a good idea, but it would be
> quite a lot bigger project than simply added FP support.
>
> -Martin

Another elegant option would be to expand the existing variables' i flag 
to tell the variable is numeric rather than integer.

Then have printf handle argument variables with the numeric flag as 
using the LC_NUMERIC=C floating-point format with dot radix point.

Expanding the existing i flag would also ensure numerical expressions 
would handle the same value format.

The David method: Take down multiple issues with one stone.



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