Support ArraysOfArrays v1

ArraysOfArrays v1 adds the element type of VectorOfVectors as a fifth
type parameter, so the four-parameter type spelled out in
_field_output_type is no longer concrete there and the type assertions
for struct fields containing vectors fail. The vector field output type
now goes through a version-conditional helper.

Created by generative AI.

Author: oschulz

Project.toml

@@ -38,7 +38,7 @@ UnROOTXRootDExt = "XRootD"
 AbstractTrees = "^0.4"
 Accessors = "0.1.36"
 Aqua = "^0.8"
-ArraysOfArrays = "^0.6"
+ArraysOfArrays = "^0.6, ^1"
 Arrow = "~2.7.1"
 BitIntegers = "^0.3"
 CodecLz4 = "^0.4"

src/RNTuple/fieldcolumn_reading.jl

@@ -147,7 +147,13 @@ function read_field(io, field::LeafField{Bool}, page_list)
     return res::_field_output_type(field)
 end
 
-_field_output_type(::Type{VectorField{O, T}}) where {O, T} = VectorOfVectors{eltype(_field_output_type(T)), _field_output_type(T), Vector{eltype(O)}, Vector{Tuple{}}}
+# ArraysOfArrays v1 adds the element type of VectorOfVectors as a fifth type parameter
+@static if pkgversion(ArraysOfArrays) >= v"1"
+    _vov_type(::Type{VT}, ::Type{VI}) where {VT, VI} = VectorOfVectors{eltype(VT), VT, VI, Vector{Tuple{}}, Base.promote_op(view, VT, UnitRange{Int})}
+else
+    _vov_type(::Type{VT}, ::Type{VI}) where {VT, VI} = VectorOfVectors{eltype(VT), VT, VI, Vector{Tuple{}}}
+end
+_field_output_type(::Type{VectorField{O, T}}) where {O, T} = _vov_type(_field_output_type(T), Vector{eltype(O)})
 function read_field(io, field::VectorField{O, T}, page_list) where {O, T}
     offset = read_field(io, field.offset_col, page_list)
     content = read_field(io, field.content_col, page_list)