Re: Ada Strings Libraries for the clueless.

[Mark Biggar <mark.a.biggar@attbi.com>]

Caffeine Junky wrote:
> Recently I've actually taken the time to peruse the Ada.Strings section
> of the Ada LRM. Lot's of nifty functions there, although I'm somewhat
> fuzzy on what exactly they do. Probably because I havent bothered to play
> with Strings at all until recently. Example..
> 
> Ada.Strings.Fixed
> 
> 	function Index (Source : in String; Pattern : in String;
> 				 Going : in Direction := Forward;
> 				 Mapping : in Maps.Character_Mapping := Maps.Identity)
> 	return Natural;
> 
> 
> Now, the gist of this function is pretty clear. It looks at a String and
> returns the number of how many Characters are in the string(I'm
> assuming.) But what's this "Pattern" string I'm supposed to pass to it? 
> Does it only count the characters in the String that match the Pattern given
> in the Pattern variable?

No, it searchs the string Source for the leftmost occurence of a
substring that is equal to Pattern and returns the index of the
start of that substring.

-- 
Mark Biggar
mark.a.biggar@attbi.com