Merge pull request #5 from JuliaArrays/teh/indices

Support indices

Author: timholy

src/MappedArrays.jl

@@ -48,6 +48,7 @@ of_eltype{S,T}(::T, data::AbstractArray{S}) = of_eltype(T, data)
 
 Base.parent(A::AbstractMappedArray) = A.data
 Base.size(A::AbstractMappedArray) = size(A.data)
+Base.indices(A::AbstractMappedArray) = indices(A.data)
 parenttype{T,N,A,F}(::Type{ReadonlyMappedArray{T,N,A,F}}) = A
 parenttype{T,N,A,F,Finv}(::Type{MappedArray{T,N,A,F,Finv}}) = A
 Base.linearindexing{MA<:AbstractMappedArray}(::Type{MA}) = Base.linearindexing(parenttype(MA))

test/REQUIRE

@@ -1 +1,2 @@
 FixedPointNumbers
+OffsetArrays

test/runtests.jl

@@ -1,4 +1,4 @@
-using MappedArrays, FixedPointNumbers
+using MappedArrays, FixedPointNumbers, OffsetArrays
 using Base.Test
 
 a = [1,4,9,16]
@@ -57,3 +57,11 @@ b = @inferred(of_eltype(Float64, a))
 @test b === a
 b = @inferred(of_eltype(0.0, a))
 @test b === a
+
+# OffsetArrays
+a = OffsetArray(randn(5), -2:2)
+aabs = mappedarray(abs, a)
+@test indices(aabs) == (-2:2,)
+for i = -2:2
+    @test aabs[i] == abs(a[i])
+end