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From: Martin Trenkmann <martin.trenkmann@posteo.de>
Newsgroups: comp.lang.ada
Subject: Re: Implementing character sets for Wide_Character
Date: Fri, 06 Mar 2015 22:02:41 +0100
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Date: 2015-03-06T22:02:41+01:00
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>> I need to implement a containment check for Wide_Character in a wide
>> character set. I have two approaches in mind.
> 
> If you really care about speed, then implement both and measure the
> speed.  It's not clear that the bit map will be faster -- using more
> memory harms cache behavior.

Yes that's true.

> Also take a look at package Ada.Strings.Wide_Maps.
> It contains type Wide_Character_Set, represented as a sorted
> sequence of ranges.  Measure that one, too.

Don't know why I overlooked that package. I don't intend to reinvent the wheel - thanks for the hint.

> Why Wide_Character rather than Wide_Wide_Character?

Because my pretty old character set I have to deal with assigns Japanese characters to 16-bit values.

- Martin