failures for non-Int64 ranges

[ogauthe]

There has been significant work on generalizing BlockArrays to non-Int64 index type, including #405 . I still find some missing cases:

• convert into an AbstractUnitRange fails

using BlockArrays: blockedrange, mortar
convert(AbstractUnitRange{Int64}, blockedrange([Int32(1)]))

ERROR: MethodError: no method matching AbstractUnitRange{Int64}(::BlockedOneTo{Int32, Vector{Int32}})
The type `AbstractUnitRange{Int64}` exists, but no method is defined for this combination of argument types when trying to construct it.

Closest candidates are:
  AbstractUnitRange{T}(::AbstractUnitRange{T}) where T
   @ Base range.jl:1295
  AbstractUnitRange{Int64}(::Static.OptionallyStaticUnitRange)
   @ Static ~/.julia/packages/Static/SeEGr/src/ranges.jl:258
  AbstractUnitRange{T}(::Static.OptionallyStaticUnitRange) where T
   @ Static ~/.julia/packages/Static/SeEGr/src/ranges.jl:259
  ...

Stacktrace:
 [1] convert(::Type{AbstractUnitRange{Int64}}, r::BlockedOneTo{Int32, Vector{Int32}})
   @ Base ./range.jl:269
 [2] top-level scope
   @ REPL[1]:1**

• broadcasting fails for non-Int64 ranges

v = mortar([[1]], (blockedrange([Int32(1)]),))
Int.(v)

ERROR: MethodError: no method matching subblocks(::BlockVector{Int64, Vector{…}, Tuple{…}}, ::Tuple{BlockedOneTo{…}}, ::Int64)
The function `subblocks` exists, but no method is defined for this combination of argument types.

Closest candidates are:
  subblocks(::AbstractArray, ::NTuple{N, AbstractUnitRange{Int64}}, ::Integer) where N
   @ BlockArrays ~/.julia/packages/BlockArrays/XczLX/src/blockbroadcast.jl:119
  subblocks(::Any, ::NTuple{N, AbstractUnitRange{Int64}}, ::Integer) where N
   @ BlockArrays ~/.julia/packages/BlockArrays/XczLX/src/blockbroadcast.jl:116

Stacktrace:
 [1] (::BlockArrays.var"#58#63"{BlockVector{…}, Base.Broadcast.Broadcasted{…}, Tuple{…}})(dim::Int64)
   @ BlockArrays ~/.julia/packages/BlockArrays/XczLX/src/blockbroadcast.jl:147
 [2] ntuple
   @ ./ntuple.jl:19 [inlined]
 [3] _generic_blockbroadcast_copyto!
   @ ~/.julia/packages/BlockArrays/XczLX/src/blockbroadcast.jl:146 [inlined]
 [4] copyto!(dest::BlockVector{…}, bc::Base.Broadcast.Broadcasted{…})
   @ BlockArrays ~/.julia/packages/BlockArrays/XczLX/src/blockbroadcast.jl:187
 [5] copy
   @ ./broadcast.jl:897 [inlined]
 [6] materialize(bc::Base.Broadcast.Broadcasted{BlockArrays.BlockStyle{1}, Nothing, Type{Int64}, Tuple{BlockVector{…}}})
   @ Base.Broadcast ./broadcast.jl:872
 [7] top-level scope
   @ REPL[4]:1
Some type information was truncated. Use `show(err)` to see complete types.