🚀 go-pugleaf

hi!

has anyone implemented any functions in Gofer to do any of the following on Floats:

sqrt exp log sin atan erf

the sqrt is easy, but the limited support for Floats in Gofer means that the others
are hard to do adequately.

btw, i don't mind if you've use `primitive' to define them in the interpreter itself.
even if you don't have code, hints would be good. i don't have problems with the
numerical analysis, but the absence of functions to return the exponent and mantissa
of a Float is a real problem. (perhaps Mark Jones might consider defining such
functions a la Haskell in the next release?)

many thanks!

	bert.