Use weakdeps on Julia v1.9

Project.toml

@@ -9,6 +9,16 @@ GPUArraysCore = "46192b85-c4d5-4398-a991-12ede77f4527"
 StaticArraysCore = "1e83bf80-4336-4d27-bf5d-d5a4f845583c"
 Tables = "bd369af6-aec1-5ad0-b16a-f7cc5008161c"
 
+[weakdeps]
+GPUArraysCore = "46192b85-c4d5-4398-a991-12ede77f4527"
+StaticArraysCore = "1e83bf80-4336-4d27-bf5d-d5a4f845583c"
+Tables = "bd369af6-aec1-5ad0-b16a-f7cc5008161c"
+
+[extensions]
+StructArraysGPUArraysCoreExt = "GPUArraysCore"
+StructArraysStaticArraysCoreExt = "StaticArraysCore"
+StructArraysTablesExt = "Tables"
+
 [compat]
 Adapt = "1, 2, 3"
 DataAPI = "1"

ext/StructArraysGPUArraysCoreExt.jl

@@ -0,0 +1,19 @@
+module StructArraysGPUArraysCoreExt
+
+
+using StructArrays
+import GPUArraysCore
+
+# for GPU broadcast
+import GPUArraysCore
+function GPUArraysCore.backend(::Type{T}) where {T<:StructArray}
+    backends = map_params(GPUArraysCore.backend, array_types(T))
+    backend, others = backends[1], tail(backends)
+    isconsistent = mapfoldl(isequal(backend), &, others; init=true)
+    isconsistent || throw(ArgumentError("all component arrays must have the same GPU backend"))
+    return backend
+end
+always_struct_broadcast(::GPUArraysCore.AbstractGPUArrayStyle) = true
+
+
+end # module

src/staticarrays_support.jl → ext/StructArraysStaticArraysCoreExt.jl

@@ -1,3 +1,11 @@
+module StructArraysStaticArraysCoreExt
+
+
+using StructArrays
+using StructArrays: StructArrayStyle
+
+using Base.Broadcast: Broadcasted
+
 using StaticArraysCore: StaticArray, FieldArray, tuple_prod
 
 """
@@ -66,3 +74,6 @@ end
         return map(Base.Fix2(getfield, i), x)
     end
 end
+
+
+end # module

src/tables.jl → ext/StructArraysTablesExt.jl

@@ -1,3 +1,7 @@
+module StructArraysTablesExt
+
+
+using StructArrays
 import Tables
 
 Tables.isrowtable(::Type{<:StructArray}) = true
@@ -38,3 +42,6 @@ for (f, g) in zip((:append!, :prepend!), (:push!, :pushfirst!))
         end
     end
 end
+
+
+end # module

src/StructArrays.jl

@@ -12,8 +12,12 @@ include("utils.jl")
 include("collect.jl")
 include("sort.jl")
 include("lazy.jl")
-include("tables.jl")
-include("staticarrays_support.jl")
+
+@static if !isdefined(Base, :get_extension)
+    include("../ext/StructArraysGPUArraysCoreExt.jl")
+    include("../ext/StructArraysTablesExt.jl")
+    include("../ext/StructArraysStaticArraysCoreExt.jl")
+end
 
 # Implement refarray and refvalue to deal with pooled arrays and weakrefstrings effectively
 import DataAPI: refarray, refvalue
@@ -29,15 +33,4 @@ end
 import Adapt
 Adapt.adapt_structure(to, s::StructArray) = replace_storage(x->Adapt.adapt(to, x), s)
 
-# for GPU broadcast
-import GPUArraysCore
-function GPUArraysCore.backend(::Type{T}) where {T<:StructArray}
-    backends = map_params(GPUArraysCore.backend, array_types(T))
-    backend, others = backends[1], tail(backends)
-    isconsistent = mapfoldl(isequal(backend), &, others; init=true)
-    isconsistent || throw(ArgumentError("all component arrays must have the same GPU backend"))
-    return backend
-end
-always_struct_broadcast(::GPUArraysCore.AbstractGPUArrayStyle) = true
-
 end # module