Fix behavior of copy and similar (#12)

Author: MilesCranmer

src/ReadOnlyArrays.jl

@@ -69,7 +69,7 @@ Base.iterate(x::ReadOnlyArray, args...) = iterate(x.parent, args...)
 
 Base.length(x::ReadOnlyArray) = length(x.parent)
 
-Base.similar(x::ReadOnlyArray) = similar(x.parent) |> ReadOnlyArray
+Base.similar(x::ReadOnlyArray) = similar(x.parent)
 
 Base.axes(x::ReadOnlyArray) = axes(x.parent)
 

test/runtests.jl

@@ -51,6 +51,12 @@ end
         fa = f()
         @test fa isa ReadOnlyArray{Float64,2}
         @test fa == x
+
+        a = ReadOnly([1, 2])
+        @test typeof(similar(a)) === Vector{Int64}
+
+        @test copy(a) == [1, 2]
+        @test typeof(copy(a)) === Vector{Int64}
     end
 end