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Define mapfoldl/foldl for static arrays #750

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Mar 3, 2020
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Define mapfoldl/foldl for static arrays #750

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Define mapfoldl/foldl for static arrays
tkf Feb 27, 2020
cf9a190
Link to specialization tips in the Julia manual
tkf Mar 3, 2020
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Link to specialization tips in the Julia manual
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@tkf
tkf committed Mar 3, 2020
commit cf9a19014dcc01f34f37b13b384486f71fed1a55
6 changes: 5 additions & 1 deletion src/mapreduce.jl
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Expand Up @@ -202,7 +202,11 @@ reduce(::typeof(hcat), A::StaticArray{<:Tuple,<:StaticVecOrMatLike}) =
## (map)foldl ##
################

@inline mapfoldl(f, op::R, a::StaticArray; init = _InitialValue()) where {R} =
# Using `where {R}` to force specialization. See:
# https://docs.julialang.org/en/v1.5-dev/manual/performance-tips/#Be-aware-of-when-Julia-avoids-specializing-1
# https://github.com/JuliaLang/julia/pull/33917

@inline mapfoldl(f::F, op::R, a::StaticArray; init = _InitialValue()) where {F,R} =
_mapfoldl(f, op, :, init, Size(a), a)
@inline foldl(op::R, a::StaticArray; init = _InitialValue()) where {R} =
_foldl(op, a, :, init)
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