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From: Matthias Schabel (boost_at_[hidden])
Date: 2007-04-11 15:11:30

> Matthias Schabel wrote:
>> What do you think about proposing to add mpl::unary_plus,
>> mpl::unary_minus, mpl::pow, and mpl::root to the MPL arithmetic
>> operations?
> mpl::negate already exists. There is no point to unary plus. pow
> and root would be good.

Actually, there's nothing preventing someone from defining a unary +
operator that doesn't return the same type as the type it operates
on, to the best of my knowledge, so it is potentially important to
consider that possibility :

struct blah { };
struct blahblah { };

blahblah operator+(const blah&) { return blahblah(); }

 From a notational standpoint, it would be nice to have unary_plus
and unary_minus, although unary_minus would just delegate to negate.


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