Re: Generics vs. O-O?

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

On 08/02/2013 08:36 AM, Alan Jump wrote:
>
> This is going off on a bit of a tangent, but as a new student of the
> language, I  think a case could be made that many stand-alone packages or
> procedures in Ada are singletons, simply because of Ada's inherent strong
> typing. After all, what's a singleton? By definition, to be a singleton
> pattern, two criteria must be met: one and only one instance with a global
> point of access, and initialization on first use. (Source:
> http://sourcemaking.com/design_patterns/singleton)

Right. The "singleton type" is a kludge from languages that confuse the concepts 
of type and module. In Ada, which properly separates these concepts, a singleton 
is simply a package.

-- 
Jeff Carter
"You me on the head hitted."
Never Give a Sucker an Even Break
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