[boost] [mpl] arithmetic feature request

From: Matthias Schabel (boost_at_[hidden])
Date: 2007-04-21 01:50:44

It would be nice if we could represent all compile-time algebraic  
operations in Boost.Units using MPL arithmetic. At present, MPL  
supports negate, adds, subtracts, times, divides. Boost.Units  
additionally would require :

1) unary_plus - the compile-time equivalent of operator+(T)
2) unary_minus - the compile-time equivalent of operator-(T); this is  
identical to current mpl::negate, but it would be nice to have it for  
notational consistency with unary_plus
3) power<T,U> (or pow<T,U>) - the compile-time equivalent of pow(T,U)
4) root<T,U> - the compile-time equivalent of pow(T,1/U); can be  
implemented with power<T,U>, but this is a nicer syntax

to eliminate its remaining compile-time algebra operators. Any  
thoughts on whether this would be a worthwhile addition to MPL?

Matthias