JuliaOpt/JuMP.jl — pull request #215 by joehuchette (2014-07-03 15:55:09+00:00)
Title: RFC: New approach to operators

Tried to reimplement as much of the operator overloading as possible using ``promote_type`` and ``convert`` methods. Ended up being a bit messier than I hoped, so not sure if this is an improvement over what we had before.