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comparison index.jl @ 96:0743e1247384 cell_based_test

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Add Index type for keeping track of regions
author Jonatan Werpers <jonatan@werpers.com>
date Tue, 05 Feb 2019 14:57:02 +0100
parents
children 50273f745f05
comparison
equal deleted inserted replaced
95:9d53ecca34f7 96:0743e1247384
1 abstract type Region end
2 struct Interior <: Region end
3 struct Lower <: Region end
4 struct Upper <: Region end
5
6 struct Index{R<:Region, T<:Integer}
7 i::T
8
9 Index{R,T}(i::T) where {R<:Region,T<:Integer} = new{R,T}(i)
10 Index{R}(i::T) where {R<:Region,T<:Integer} = new{R,T}(i)
11 Index(i::T, ::Type{R}) where {R<:Region,T<:Integer} = Index{R,T}(i)
12 Index(t::Tuple{T, DataType}) where {R<:Region,T<:Integer} = Index{t[2],T}(t[1]) # TBD: This is not very specific in what types are allowed in t[2]. Can this be fixed?
13 end
14
15 # Index(R::Type{<:Region}) = Index{R}
16
17 ## Vill kunna skriva
18 ## IndexTupleType(Int, (Lower, Interior))
19 Index(R::Type{<:Region}, T::Type{<:Integer}) = Index{R,T}
20 IndexTupleType(T::Type{<:Integer},R::NTuple{N, DataType} where N) = Tuple{Index.(R, T)...}
21
22 Base.convert(::Type{T}, i::Index{R,T} where R) where T = i.i
23 Base.convert(::Type{CartesianIndex}, I::NTuple{N,Index} where N) = CartesianIndex(convert.(Int, I))
24
25 Base.Int(I::Index) = I.i
26
27 function Index(i::Integer, boundary_width::Integer, dim_size::Integer)
28 if 0 < i <= boundary_width
29 return Index{Lower}(i)
30 elseif boundary_width < i <= dim_size-boundary_width
31 return Index{Interior}(i)
32 elseif dim_size-boundary_width < i <= dim_size
33 return Index{Upper}(i)
34 else
35 error("Bounds error") # TODO: Make this more standard
36 end
37 end
38
39 IndexTuple(t::Vararg{Tuple{T, DataType}}) where T<:Integer = Index.(t)