Extend generic sparse map[!]/broadcast[!] to sparse vectors and sparse vector/matrix combinations.

Extend generic sparse map[!]/broadcast[!] to sparse vectors and sparse vector/matrix combinations. Do so by introducing a common interface to SparseVector and SparseMatrixCSC for the purposes of map[!]/broadcast[!], and rewriting sparse map[!]/broadcast[!] against that interface. Relocate that code to a separate file/module base/sparse/higherorderfns.jl/SparseArrays.HigherOrderFns, loaded after definition of both SparseVector and SparseMatrixCSC.

Author: Sacha0

base/sparse/abstractsparse.jl

@@ -20,4 +20,4 @@ issparse{T, A<:AbstractSparseMatrix}(S::LinAlg.UnitLowerTriangular{T, A}) = true
 issparse{T, A<:AbstractSparseMatrix}(S::UpperTriangular{T, A}) = true
 issparse{T, A<:AbstractSparseMatrix}(S::LinAlg.UnitUpperTriangular{T, A}) = true
 
-indtype{Tv,Ti}(S::AbstractSparseArray{Tv,Ti}) = Ti
+indtype{Tv,Ti}(S::AbstractSparseArray{Tv,Ti}) = (Base.@_pure_meta; Ti)