Add support for distance_to_set and the Parameter set (#2889)

Author: guimarqu

src/Utilities/distance_to_set.jl

@@ -109,6 +109,15 @@ function distance_to_set(
     return abs(set.value - x)
 end
 
+# This is the minimal L2-norm.
+function distance_to_set(
+    ::ProjectionUpperBoundDistance,
+    x::T,
+    set::MOI.Parameter{T},
+) where {T<:Number}
+    return abs(set.value - x)
+end
+
 # This is the minimal L2-norm.
 function distance_to_set(
     ::ProjectionUpperBoundDistance,

test/Utilities/distance_to_set.jl

@@ -61,6 +61,12 @@ function test_equalto()
     return
 end
 
+function test_parameter()
+    _test_set(MOI.Parameter(2.0), 1.0 => 1.0)
+    _test_set(MOI.Parameter(0.5), 1.0 => 0.5)
+    return
+end
+
 function test_interval()
     _test_set(MOI.Interval(1.0, 2.0), 1.0 => 0.0, 0.5 => 0.5, 2.75 => 0.75)
     return