Mercurial > repos > public > sbplib_julia
diff src/Grids/grid.jl @ 1476:62f9d0387a2a feature/grids/componentview
Introduce a view type and implement sliced indexing for the components.
author | Jonatan Werpers <jonatan@werpers.com> |
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date | Fri, 01 Dec 2023 14:58:05 +0100 |
parents | 76b190ca9a27 |
children | 06dec7b68f82 553111a15506 |
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--- a/src/Grids/grid.jl Fri Dec 01 13:36:47 2023 +0100 +++ b/src/Grids/grid.jl Fri Dec 01 14:58:05 2023 +0100 @@ -40,12 +40,38 @@ component_type(T::Type) = eltype(eltype(T)) component_type(t) = component_type(typeof(t)) -function componentview(gf, component_index...) - A = reinterpret(reshape, component_type(gf), gf) +componentview(gf, component_index...) = ArrayComponentView(gf, component_index) + +struct ArrayComponentView{CT,T,D,AT <: AbstractArray{T,D}, IT} <: AbstractArray{CT,D} + v::AT + component_index::IT + + function ArrayComponentView(v, component_index) + CT = typeof(first(v)[component_index...]) + return new{CT, eltype(v), ndims(v), typeof(v), typeof(component_index)}(v,component_index) + end +end - component_linear_index = LinearIndices(first(gf))[component_index...] - return @view A[component_linear_index,:,:] -end +Base.size(cv) = size(cv.v) +Base.getindex(cv::ArrayComponentView, i::Int) = cv.v[i][cv.component_index...] +Base.getindex(cv::ArrayComponentView, I::Vararg{Int}) = cv.v[I...][cv.component_index...] +IndexStyle(::Type{<:ArrayComponentView{<:Any,<:Any,AT}}) where AT = IndexStyle(AT) + +# TODO: Implement the remaining optional methods from the array interface +# setindex!(A, v, i::Int) +# setindex!(A, v, I::Vararg{Int, N}) +# iterate +# length(A) +# similar(A) +# similar(A, ::Type{S}) +# similar(A, dims::Dims) +# similar(A, ::Type{S}, dims::Dims) +# # Non-traditional indices +# axes(A) +# similar(A, ::Type{S}, inds) +# similar(T::Union{Type,Function}, inds) + +# TODO: Implement a more general ComponentView that can handle non-AbstractArrays. """ refine(g::Grid, r)