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refactor tuple_of_arrays #144

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refactor tuple_of_arrays #144

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49 changes: 5 additions & 44 deletions src/primitives.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -49,51 +49,12 @@ julia> b,c = tuple_of_arrays(a)
```
"""
function tuple_of_arrays(a)
function first_and_tail(a)
x = map(first,a)
y = map(Base.tail,a)
x, y
if eltype(a) <: Tuple{}
return ()
end
function take(a,::Type{Tuple{T}} where T)
x = map(first,a)
(x,)
end
function take(a,::Type{Tuple{A,B}} where {A,B})
x, y = first_and_tail(a)
t1, = tuple_of_arrays(y)
(x,t1)
end
function take(a,::Type{Tuple{A,B,C}} where {A,B,C})
x, y = first_and_tail(a)
t1,t2 = tuple_of_arrays(y)
(x,t1,t2)
end
function take(a, ::Type{Tuple{A,B,C,D}} where {A,B,C,D})
x, y = first_and_tail(a)
t1, t2, t3 = tuple_of_arrays(y)
(x, t1, t2, t3)
end
function take(a, ::Type{Tuple{A,B,C,D,E}} where {A,B,C,D,E})
x, y = first_and_tail(a)
t1, t2, t3, t4 = tuple_of_arrays(y)
(x, t1, t2, t3, t4)
end
function take(a, ::Type{Tuple{A,B,C,D,E,F}} where {A,B,C,D,E,F})
x, y = first_and_tail(a)
t1, t2, t3, t4, t5 = tuple_of_arrays(y)
(x, t1, t2, t3, t4, t5)
end
function take(a, ::Type{Tuple{A,B,C,D,E,F,G}} where {A,B,C,D,E,F,G})
x, y = first_and_tail(a)
t1, t2, t3, t4, t5, t6 = tuple_of_arrays(y)
(x, t1, t2, t3, t4, t5, t6)
end
# this one is type instable, why? Previous methods for take are for circumvent this issue.
function take(a,::Type)
x, y = first_and_tail(a)
(x,tuple_of_arrays(y)...)
end
take(a,eltype(a))
x = map(first, a)
y = map(Base.tail, a)
return (x, tuple_of_arrays(y)...)
end


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