Allow implicit conversion

Author: milesfrain

src/heaps/binary_heap.jl

@@ -38,7 +38,7 @@ mutable struct BinaryHeap{T, O <: Base.Ordering} <: AbstractHeap{T}
         new{T,O}(O(), Vector{T}())
     end
 
-    function BinaryHeap{T, O}(xs::AbstractVector{T}) where {T,O}
+    function BinaryHeap{T, O}(xs) where {T,O}
         ordering = O()
         valtree = heapify(xs, ordering)
         new{T,O}(ordering, valtree)

test/test_binheap.jl

@@ -23,6 +23,14 @@
             @test true
         end
 
+        @testset "implicit conversion" begin
+            BinaryHeap{Float64, Base.ForwardOrdering}(vs)
+            BinaryMinHeap{Float64}(vs)
+            BinaryMaxHeap{Float64}(vs)
+
+            @test true
+        end
+
         @testset "confirm heap" begin
             @test isheap([1, 2, 3, 4, 7, 9, 10, 14, 8, 16])
             @test isheap([16, 14, 10, 8, 7, 3, 9, 1, 4, 2], Base.Reverse)