Support UnitRange(::ClosedInterval)

Author: timholy

src/closed.jl

@@ -100,6 +100,10 @@ function convert(::Type{R}, i::ClosedInterval{I}) where {R<:AbstractUnitRange,I<
     R(minimum(i), maximum(i))
 end
 
+function (::Type{R})(i::ClosedInterval{I}) where {R<:AbstractUnitRange,I<:Integer}
+    R(minimum(i), maximum(i))
+end
+
 range(i::ClosedInterval{I}) where {I<:Integer} = convert(UnitRange{I}, i)
 
 Base.promote_rule(::Type{ClosedInterval{T1}}, ::Type{ClosedInterval{T2}}) where {T1,T2} = ClosedInterval{promote_type(T1, T2)}

test/runtests.jl

@@ -15,6 +15,7 @@ using Compat.Dates
         @test @inferred(convert(UnitRange, I)) === 0:3
         @test @inferred(range(I)) === 0:3
         @test @inferred(convert(UnitRange{Int16}, I)) === Int16(0):Int16(3)
+        @test @inferred(UnitRange{Int16}(I)) === Int16(0):Int16(3)
         J = 3..2
         K = 5..4
         L = 3 ± 2