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Fix output shape of map and collect #159

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Sep 18, 2020
Merged

Fix output shape of map and collect #159

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6829bca
Fix output shape of map and collect
tkf Sep 17, 2020
26bfade
Fix map and collect on filter etc.
tkf Sep 18, 2020
18e956f
Test and fix empty cases
tkf Sep 18, 2020
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3 changes: 2 additions & 1 deletion src/ThreadsX.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -38,7 +38,8 @@ module Implementations
import SplittablesBase
using ArgCheck: @argcheck, @check
using BangBang: SingletonVector, append!!, push!!, union!!
using Base: Ordering, add_sum, mapreduce_empty, mul_prod, reduce_empty
using Base:
HasShape, IteratorSize, Ordering, add_sum, mapreduce_empty, mul_prod, reduce_empty
using ConstructionBase: setproperties
using InitialValues: asmonoid
using Referenceables: referenceable
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4 changes: 4 additions & 0 deletions src/basesizes.jl
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@@ -1,3 +1,7 @@
default_basesize(n::Integer) = max(1, cld(n, (8 * Threads.nthreads())))
default_basesize(xs) =
default_basesize(SplittablesBase.amount(last(extract_transducer(xs))))

default_basesize(_, _, xs) = default_basesize(xs::AbstractArray)

# TODO: handle `Base.Fix2` etc.
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16 changes: 12 additions & 4 deletions src/map.jl
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Expand Up @@ -3,10 +3,16 @@ __map(f, itr; kwargs...) =
__map(f, itrs...; kwargs...) =
tcollect(MapSplat(f), zip(itrs...); basesize = default_basesize(itrs[1]), kwargs...)

reshape_as(ys, xs) = reshape_as(ys, xs, IteratorSize(xs))
reshape_as(ys, xs, ::IteratorSize) = ys
reshape_as(ys, xs, ::HasShape) = reshape(ys, size(xs))
reshape_as(::Empty{T}, xs, isize::HasShape) where {T<:AbstractVector} =
reshape_as(T(undef, length(xs)), xs, isize)

function _map(f, itr, itrs...; kwargs...)
ys = __map(f, itr, itrs...; kwargs...)
isempty(ys) && return map(f, itr, itrs...)
return ys
return reshape_as(ys, itr)
end

ThreadsX.map(f, itr, itrs...; kwargs...) = _map(f, itr, itrs...; kwargs...)
Expand Down Expand Up @@ -36,8 +42,10 @@ end
struct ConvertTo{T} end
(::ConvertTo{T})(x) where {T} = convert(T, x)

ThreadsX.collect(::Type{T}, itr; kwargs...) where {T} =
tcopy(Map(ConvertTo{T}()), Vector{T}, itr; basesize = default_basesize(itr), kwargs...)
ThreadsX.collect(::Type{T}, itr; kwargs...) where {T} = reshape_as(
tcopy(Map(ConvertTo{T}()), Vector{T}, itr; basesize = default_basesize(itr), kwargs...),
itr,
)

ThreadsX.collect(itr; kwargs...) =
tcollect(itr; basesize = default_basesize(itr), kwargs...)
reshape_as(tcollect(itr; basesize = default_basesize(itr), kwargs...), itr)
3 changes: 0 additions & 3 deletions src/utils.jl
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@@ -1,6 +1,3 @@
default_basesize(n::Integer) = max(1, cld(n, (8 * Threads.nthreads())))
default_basesize(xs) = default_basesize(length(xs))

function adhoc_partition(xs, n)
@check firstindex(xs) == 1
m = cld(length(xs), n)
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10 changes: 10 additions & 0 deletions test/test_with_base.jl
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
module TestWithBase

using Base: splat
using Test
using ThreadsX

Expand All @@ -10,9 +11,16 @@ inc(x) = x + 1
raw_testdata = """
collect(1:10)
collect(Float64, 1:10)
collect(x for x in 1:10 if isodd(x))
collect(Float64, (x for x in 1:10 if isodd(x)))
collect(inc(x) for x in 1:10)
collect(Float64, (inc(x) for x in 1:10))
collect(x * y for x in 1:10, y in 11:20)
collect(Float64, (x * y for x in 1:10, y in 11:20))
collect(x * y for x in 1:0, y in 11:20)
collect(Float64, (x * y for x in 1:0, y in 11:20))
map(inc, 1:10)
map(inc, (x for x in 1:10 if isodd(x)))
map(inc, Float64[])
map(inc, ones(3, 3))
map(inc, ones(3, 0))
Expand All @@ -21,6 +29,8 @@ map(*, 1:10, 11:20)
map(*, ones(3, 3), ones(3, 3))
map(*, ones(3, 0), ones(3, 0))
map(*, ones(0, 3), ones(0, 3))
map(splat(*), Iterators.product(1:10, 11:20))
map(splat(*), Iterators.product(1:0, 11:20))
reduce(+, 1:10)
reduce(+, 1:0)
reduce(+, Bool[])
Expand Down