Add Base.copy,Base.copymutable for Sorted containers

Author: NHDaly

src/sorted_dict.jl

@@ -535,6 +535,11 @@ function mergetwo!(m::SortedDict{K,D,Ord},
     end
 end
 
+# Standard copy functions use packcopy - that is, they retain elements but not
+# the identical structure.
+Base.copymutable(m::SortedDict) = packcopy(m)
+Base.copy(m::SortedDict) = packcopy(m)
+
 """
     packcopy(sc)
 

src/sorted_multi_dict.jl

@@ -385,6 +385,11 @@ function mergetwo!(m::SortedMultiDict{K,D,Ord},
     end
 end
 
+# Standard copy functions use packcopy - that is, they retain elements but not
+# the identical structure.
+Base.copymutable(m::SortedMultiDict) = packcopy(m)
+Base.copy(m::SortedMultiDict) = packcopy(m)
+
 """
     packcopy(sc)
 

src/sorted_set.jl

@@ -519,6 +519,11 @@ function issubset(iterable, m2::SortedSet)
     return true
 end
 
+# Standard copy functions use packcopy - that is, they retain elements but not
+# the identical structure.
+Base.copymutable(m::SortedSet) = packcopy(m)
+Base.copy(m::SortedSet) = packcopy(m)
+
 """
     packcopy(sc)
 

test/test_sorted_containers.jl

@@ -1717,4 +1717,10 @@ end
     @test pop!(s,50, nothing) == nothing
     @test isempty(s)
 
+    # Test AbstractSet/AbstractDict interface
+    for m in [SortedSet([1,2]), SortedDict(1=>2, 2=>3), SortedMultiDict(1=>2, 1=>3)]
+        # copy()
+        @test isequal(copy(m), m)
+        @test isequal(Base.copymutable(m), m)
+    end
 end