AMDG Bruno Lalande wrote:
Hi Joaquin,
Yes you're right, thanks for the advice. I really thought that an optimizing compiler was able to figure out this by itself, that is, transform things like n*n*n*n into (n*n)*(n*n). But a few tests shew me I was wrong.
<snip> With your modification the function is finally much more than a syntactic helper since it runs faster than what an average programmer would type by hand. Shouldn't it be integrated somewhere into Boost ?
There's such a function in Boost.Units. It was originally needed because the the result type depends on the exponent which must therefore be known at compile time. boost::units::quantity<boost::units::SI::area> area = boost::units::pow<2>(3.0 * boost::units::SI::meters); Note that this is not in the trunk yet. In Christ, Steven Watanabe