single disjunct constraints are allowed

(always selected as long as choose at least 1 is used for the binaries)

Author: hdavid16

src/macros.jl

@@ -85,7 +85,7 @@ Add disjunction and reformulate.
 function add_disjunction!(m::Model,disj...;reformulation::Symbol,M=missing,ϵ=1e-6,name=missing)
     #run checks
     @assert reformulation in [:big_m, :hull] "Invalid reformulation method passed to keyword argument `:reformulation`. Valid options are :big_m (Big-M Reformulation) and :hull (Hull Reformulation)."
-    @assert length(disj) > 1 "At least 2 disjuncts must be included. If there is an empty disjunct, use `nothing`."
+    # @assert length(disj) > 1 "At least 2 disjuncts must be included. If there is an empty disjunct, use `nothing`."
 
     #create indicator variable
     bin_var = ismissing(name) ? Symbol("disj_",gensym()) : name