Re: Ok - WHAT are those "Maps.Identity" things ???

["Jeffrey R.Carter" <spam.jrcarter.not@spam.acm.org.not>]

On 2022-01-05 01:54, 1.AAC0831 wrote:
> 
> The docs say to use Index(source,substr,<something>,<something-identity>)

I don't know what "docs" you mean. Anyone using Ada should be familiar with its 
standard library, which is documented in Annex A of the ARM at

http://www.ada-auth.org/standards/aarm12_w_tc1/html/AA-A.html

(I provide the link to the AARM as the annotations are sometimes useful.)

The documentation for Ada.Strings.Fixed is at

http://www.ada-auth.org/standards/aarm12_w_tc1/html/AA-A-4-3.html

and lists 6 functions named Index (and 2 for Index_Non_Blank). Of these I mostly 
use the one at paragraph 9:

9  function Index (Source   : in String;
                    Pattern  : in String;
                    Going    : in Direction := Forward;
                    Mapping  : in Maps.Character_Mapping
                                 := Maps.Identity)
       return Natural;

with the defaults for the last 2 parameters. Occasionally I've used a Going => 
Backward,

The Mapping/Test parameters are for specialized needs, such as case-insensitive 
matching or folding accented characters together, and the default will work if 
you don't need anything like that.

-- 
Jeff Carter
"When and now is this guitar piece from Stottlemeyer?
Yes, it's with Mr. Dog in Gertrude's pinball forest."
The World's Funniest Joke
133