From ed08ee98f5d7ad65bbd1f5414f5b448e0d2dc78c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Beno=C3=AEt=20Legat?= <benoit.legat@gmail.com>
Date: Thu, 18 Jul 2019 20:24:29 -0600
Subject: [PATCH 1/2] Fix broadcast for scalar sets

---
 src/sets.jl  |  2 ++
 test/sets.jl | 19 ++++++++++++++++++-
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/sets.jl b/src/sets.jl
index 61e2b73681..9ff4b316ea 100644
--- a/src/sets.jl
+++ b/src/sets.jl
@@ -37,6 +37,8 @@ Abstract supertype for subsets of ``\\mathbb{R}``.
 """
 abstract type AbstractScalarSet <: AbstractSet end
 
+Base.broadcastable(set::AbstractScalarSet) = Ref(set)
+
 dimension(s::AbstractScalarSet) = 1
 
 """
diff --git a/test/sets.jl b/test/sets.jl
index deb82310e8..8d8ff60bc7 100644
--- a/test/sets.jl
+++ b/test/sets.jl
@@ -1,3 +1,10 @@
+using Test
+
+using MathOptInterface
+const MOI = MathOptInterface
+
+include("dummy.jl")
+
 """
     MutLessThan{T<:Real} <: MOI.AbstractScalarSet
 
@@ -32,7 +39,17 @@ Base.copy(mlt::MutLessThan) = MutLessThan(Base.copy(mlt.upper))
             @test s3.set.upper ≈ 4.0
             s3_copy.set.upper = 5.0
             @test s3.set.upper ≈ 4.0
-            @test s3_copy.set.upper ≈ 5.0    
+            @test s3_copy.set.upper ≈ 5.0
+        end
+    end
+    @testset "Broadcast" begin
+        model = DummyModelWithAdd()
+        x = MOI.add_variables(model, 3)
+        cis = MOI.add_constraint.(model, x, MOI.EqualTo(0.0))
+        @test length(cis) == 3
+        for i in 1:3
+            @test cis[i] == MOI.ConstraintIndex{MOI.SingleVariable,
+                                                MOI.EqualTo{Float64}}(0)
         end
     end
 end

From 9a830682c5693087405e2e233d0f6f53060f164d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Beno=C3=AEt=20Legat?= <benoit.legat@gmail.com>
Date: Thu, 18 Jul 2019 21:23:34 -0600
Subject: [PATCH 2/2] Address comments

---
 test/sets.jl | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/test/sets.jl b/test/sets.jl
index 8d8ff60bc7..6e7a2613bd 100644
--- a/test/sets.jl
+++ b/test/sets.jl
@@ -46,10 +46,8 @@ Base.copy(mlt::MutLessThan) = MutLessThan(Base.copy(mlt.upper))
         model = DummyModelWithAdd()
         x = MOI.add_variables(model, 3)
         cis = MOI.add_constraint.(model, x, MOI.EqualTo(0.0))
+        @test cis isa Vector{MOI.ConstraintIndex{MOI.SingleVariable,
+                                                 MOI.EqualTo{Float64}}}
         @test length(cis) == 3
-        for i in 1:3
-            @test cis[i] == MOI.ConstraintIndex{MOI.SingleVariable,
-                                                MOI.EqualTo{Float64}}(0)
-        end
     end
 end