Remove the macro interface?

[dpsanders]

With #212 most functionality (currently except for variables) will be available using the symbol interface.

Can we then remove the macro interface? cc @schillic

[schillic]

(I am not sure whether the question was to me.) I do not know what the macro interface is, sorry.

[dpsanders]

Sorry I wasn't clear. I was referring to the following:

Macro interface (old):

C = @constraint x^2 + y^2 <= 1

Symbolic interface (new):

vars = @variables x, y
C = Constraint(x^2 + y^2 <= 1, vars)

The macro interface tried to be too clever by extracting the variables for you, but does not allow enough control. I would like to get rid of it.

However in model.jl in #212 I started to add a model and macro interface that is JuMP-like.
(In fact I believe there is now support in JuMP or JuMP-related packages for a constraint programming interface like this already, so we should probably not add one here.)