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From: Daryle Walker (dwalker07_at_[hidden])
Date: 2002-11-17 11:45:11

I don't know anything about Boost.Function except what I've seen
checking out the sample documentations. I have some thoughts on the ==
and != operators.

You have poisoned (in)equality operators, because of your safe_bool
type. Are you using a data pointer type, like "void *" that the
IOStreams use for their safe-Boolean type? If so, you should switch to
an even more useless type. I used member-pointers for my modulo class
template (in the Sandbox).

template < int N >
class modulo
     typename modulo self_type;

     int r_;

     typename int self_type::* safe_bool;

     operator safe_bool() const;

Here, I used a safe_bool type that was based on the particular version
of the class template, preventing cross-version comparisons. I have a
valid (in)equality operators; if you don't want that either, then
provide declarations for those operators as member functions, but make
them private.


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