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From: Paul Rubin <no.email@nospam.invalid>
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Subject: Re: Running a preprocessor from GPS?
Date: Sat, 01 Aug 2015 19:53:47 -0700
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Date: 2015-08-01T19:53:47-07:00
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"Jeffrey R. Carter" <spam.jrcarter.not@spam.not.acm.org> writes:
> Here you've lost me again. A singleton is some hidden state and some operations
> that use that state. If it can be as simple as calling static operations of a
> class, then why do you and the DP book insist on all the complications? If the
> complications are necessary, how can it be that simple?

Singleton is sort of a misnomer.  It sounds like there is always exactly
one instance, but it really means there is either one instance or zero
instances.  There are zero when the program starts, but during the
program's execution it may decide to create one instance.  The scheme
you're describing with packages sounds like the one instance is created
when the program starts.  It doesn't explain how to start with zero
instances, and dynamically create one later.