export sigexp()

[jmkuhn]

sigexp(x::DecimalFloatingPoint) is an internal function that returns (significand:IntXX, exponent::Int). The returned significand is always >= 0. When I use this function I have already checked for NaN and Inf so this internal version doesn't return useful values if passed NaN or Inf.

I suggest exporting a modified version of this that returns (sign::DecXX, significand::DecXX, exponent::Int)

julia> sigexp(d64"-1.234")
(-1.0, 1234.0, -3)

julia> sigexp(d64"NaN")
(NaN, NaN, 0)

julia> sigexp(d64"-Inf")
(-1.0, Inf, 0)

An alternative would be to have it return (sign::Int, significand::IntXX, exponent::Int) and throw an exception if passed NaN or Inf.

@quinnj