Add show(::IO, ::_VectorNonlinearOracle) (#501)

Author: odow

ext/IpoptMathOptInterfaceExt/MOI_wrapper.jl

@@ -164,6 +164,16 @@ MOI.dimension(s::_VectorNonlinearOracle) = s.input_dimension
 
 MOI.copy(s::_VectorNonlinearOracle) = s
 
+function Base.show(io::IO, s::_VectorNonlinearOracle)
+    println(io, "Ipopt._VectorNonlinearOracle(;")
+    println(io, "    dimension = ", s.input_dimension, ",")
+    println(io, "    l = ", s.l, ",")
+    println(io, "    u = ", s.u, ",")
+    println(io, "    ...,")
+    print(io, ")")
+    return
+end
+
 """
     Optimizer()
 

test/MOI_wrapper.jl

@@ -886,6 +886,7 @@ function test_vector_nonlinear_oracle()
             return
         end,
     )
+    @test occursin("Ipopt._VectorNonlinearOracle(;", sprint(show, set))
     @test MOI.dimension(set) == 5
     @test MOI.copy(set) === set
     model = Ipopt.Optimizer()