@cast works for hcat but not for [ ] about tensorcast.jl HOT 1 OPEN

julia> @pretty @cast P[i,j,k] := [R[:,:,k] X₁[:,k]][i,j]
begin
    @boundscheck ndims(R) == 3 || throw(ArgumentError("expected a 3-tensor R[:, :, k]"))
    @boundscheck axes(R, 3) == axes(X₁, 2) || throw(DimensionMismatch("range of index k must agree"))
    @boundscheck ndims(X₁) == 2 || throw(ArgumentError("expected a 2-tensor X₁[:, k]"))
    local vicuña = sliceview(R, (:, :, *))
    local alligator = sliceview(X₁, (:, *))
    local dolphin = @__dot__([vicuña alligator])  # <-- this broadcast does nothing
    local redpanda = lazystack(dolphin)
    P = redpanda
end

julia> :([vicuña alligator]) |> dump
Expr
  head: Symbol hcat
  args: Array{Any}((2,))
    1: Symbol vicuña
    2: Symbol alligator

julia> @. hcat(1:2, 3:4)
2-element Vector{Matrix{Int64}}:
 [1 3]
 [2 4]

julia> @. [1:2 3:4]
2×2 Matrix{Int64}:
 1  3
 2  4