add Adapt Ext (#36)

* add adapt ext

* remove `import Adapt` outside conditional code

Project.toml

@@ -22,13 +22,15 @@ SplittablesBase = "171d559e-b47b-412a-8079-5efa626c420e"
 Tables = "bd369af6-aec1-5ad0-b16a-f7cc5008161c"
 
 [weakdeps]
+Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
 BlockArrays = "8e7c35d0-a365-5155-bbbb-fb81a777f24e"
 DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
 LazyArrays = "5078a376-72f3-5289-bfd5-ec5146d43c02"
 OnlineStatsBase = "925886fa-5bf2-5e8e-b522-a9147a512338"
 Referenceables = "42d2dcc6-99eb-4e98-b66c-637b7d73030e"
 
 [extensions]
+TransducersAdaptExt = "Adapt"
 TransducersBlockArraysExt = "BlockArrays"
 TransducersDataFramesExt = "DataFrames"
 TransducersLazyArraysExt = "LazyArrays"
@@ -60,6 +62,7 @@ Tables = "0.2, 1.0"
 julia = "1.6"
 
 [extras]
+Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
 Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"
 BlockArrays = "8e7c35d0-a365-5155-bbbb-fb81a777f24e"
 Compat = "34da2185-b29b-5c13-b0c7-acf172513d20"
@@ -88,4 +91,4 @@ Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 TypedTables = "9d95f2ec-7b3d-5a63-8d20-e2491e220bb9"
 
 [targets]
-test = ["Aqua", "BlockArrays", "Compat", "DataFrames", "DataTools", "Dates", "Distributed", "Documenter", "Folds", "InteractiveUtils", "LazyArrays", "LiterateTest", "LoadAllPackages", "Maybe", "OnlineStats", "OnlineStatsBase", "PerformanceTestTools", "Pkg", "Random", "Referenceables", "SparseArrays", "StaticArrays", "Statistics", "StructArrays", "Test", "TypedTables"]
+test = ["Adapt", "Aqua", "BlockArrays", "Compat", "DataFrames", "DataTools", "Dates", "Distributed", "Documenter", "Folds", "InteractiveUtils", "LazyArrays", "LiterateTest", "LoadAllPackages", "Maybe", "OnlineStats", "OnlineStatsBase", "PerformanceTestTools", "Pkg", "Random", "Referenceables", "SparseArrays", "StaticArrays", "Statistics", "StructArrays", "Test", "TypedTables"]

ext/TransducersAdaptExt.jl

@@ -0,0 +1,34 @@
+module TransducersAdaptExt
+
+if isdefined(Base,:get_extension)
+    import Transducers
+    import Adapt
+else
+    import ..Transducers
+    import ..Adapt
+end
+
+Adapt.adapt_structure(to, rf::R) where {R <: Transducers.Reduction} =
+    Transducers.Reduction(Adapt.adapt(to, Transducers.xform(rf)), Adapt.adapt(to, Transducers.inner(rf)))
+
+Adapt.adapt_structure(to, xf::Transducers.Map) = Transducers.Map(Adapt.adapt(to, xf.f))
+
+Adapt.adapt_structure(to, xf::Transducers.MapSplat) = Transducers.MapSplat(Adapt.adapt(to, xf.f))
+
+Adapt.adapt_structure(to, xf::Transducers.Filter) = Transducers.Filter(Adapt.adapt(to, xf.pred))
+
+Adapt.adapt_structure(to, xf::Transducers.GetIndex{inbounds}) where {inbounds} =
+    Transducers.GetIndex{inbounds}(Adapt.adapt(to, xf.array))
+
+Adapt.adapt_structure(to, xf::Transducers.SetIndex{inbounds}) where {inbounds} =
+    Transducers.SetIndex{inbounds}(Adapt.adapt(to, xf.array))
+
+Adapt.adapt_structure(to, xf::Transducers.ReducePartitionBy) = Transducers.ReducePartitionBy(
+    Adapt.adapt(to, xf.f),
+    Adapt.adapt(to, xf.rf),
+    Adapt.adapt(to, xf.init),
+)
+end #module
+
+
+

src/Transducers.jl

@@ -80,7 +80,6 @@ export AdHocFoldable,
 using Base.Broadcast: Broadcasted
 using Base: tail
 
-import Adapt
 import Accessors
 import Tables
 using ArgCheck
@@ -156,6 +155,8 @@ const OSNonZeroNObsError = ArgumentError(
 
 if !isdefined(Base,:get_extension)
     using Requires
+    import Adapt
+    include("../ext/TransducersAdaptExt.jl")
     function __init__()
         @require BlockArrays="8e7c35d0-a365-5155-bbbb-fb81a777f24e" include("../ext/TransducersBlockArraysExt.jl")
         @require LazyArrays="5078a376-72f3-5289-bfd5-ec5146d43c02" include("../ext/TransducersLazyArraysExt.jl")

src/core.jl

@@ -335,8 +335,6 @@ Transducer(rf::Reduction) =
 # `Reduction` to `AbstractReduction`.
 Reduction(::IdentityTransducer, inner) = ensurerf(inner)
 
-Adapt.adapt_structure(to, rf::R) where {R <: Reduction} =
-    Reduction(Adapt.adapt(to, xform(rf)), Adapt.adapt(to, inner(rf)))
 
 """
     Transducers.R_{X}

src/library.jl

@@ -53,8 +53,6 @@ OutputSize(::Type{<:Map}) = SizeStable()
 isexpansive(::Map) = false
 @inline next(rf::R_{Map}, result, input) = next(inner(rf), result, xform(rf).f(input))
 
-Adapt.adapt_structure(to, xf::Map) = Map(Adapt.adapt(to, xf.f))
-
 """
     MapSplat(f)
 
@@ -83,8 +81,6 @@ isexpansive(::MapSplat) = false
 @inline next(rf::R_{MapSplat}, result, input) =
     next(inner(rf), result, xform(rf).f(input...))
 
-Adapt.adapt_structure(to, xf::MapSplat) = MapSplat(Adapt.adapt(to, xf.f))
-
 # https://clojure.github.io/clojure/clojure.core-api.html#clojure.core/replace
 # https://clojuredocs.org/clojure.core/replace
 """
@@ -290,8 +286,6 @@ end
 @inline next(rf::R_{Filter}, result, input) =
     xform(rf).pred(input) ? next(inner(rf), result, input) : result
 
-Adapt.adapt_structure(to, xf::Filter) = Filter(Adapt.adapt(to, xf.pred))
-
 """
     NotA(T)
 
@@ -1562,9 +1556,6 @@ Base.:(==)(xf1::GetIndex{inbounds,A},
            xf2::GetIndex{inbounds,A}) where {inbounds,A} =
     xf1.array == xf2.array
 
-Adapt.adapt_structure(to, xf::GetIndex{inbounds}) where {inbounds} =
-    GetIndex{inbounds}(Adapt.adapt(to, xf.array))
-
 """
     SetIndex(array)
     SetIndex{inbounds}(array)
@@ -1610,9 +1601,6 @@ Base.:(==)(xf1::SetIndex{inbounds,A},
            xf2::SetIndex{inbounds,A}) where {inbounds,A} =
     xf1.array == xf2.array
 
-Adapt.adapt_structure(to, xf::SetIndex{inbounds}) where {inbounds} =
-    SetIndex{inbounds}(Adapt.adapt(to, xf.array))
-
 """
     Inject(iterator)
 

src/partitionby.jl

@@ -47,11 +47,6 @@ struct ReducePartitionBy{F,RF,Init} <: Transducer
 end
 ReducePartitionBy(f, rf) = ReducePartitionBy(f, rf, Init)
 
-Adapt.adapt_structure(to, xf::ReducePartitionBy) = ReducePartitionBy(
-    Adapt.adapt(to, xf.f),
-    Adapt.adapt(to, xf.rf),
-    Adapt.adapt(to, xf.init),
-)
 
 struct PartitionChunk{K,V}
     kr::K