From: Gregg N 

Paul Ranson wrote:
> FWIW I think an initial underbar on an identifier is reserved for the
> implementation, so bad practice for the user to use.

It's been a while since I looked at that, but I think such identifiers are
reserved only at file scope unless the underscore is followed by another
underscore or an uppercase character, in which case they are reserved in
any context. The rules may actually be more baroque than that. To be safe,
as you said, it's best to avoid defining names with leading underscores.

> I'm not sure what Geo's requirement was, but if it boils down to a
> class with simple methods then it's a reasonable expectation. In this
> case the template magic is trivial.

Agreed.

Gregg

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