merge BlockIndexRange using BlockArrays (#63)

Author: ogauthe

Project.toml

@@ -1,7 +1,7 @@
 name = "FusionTensors"
 uuid = "e16ca583-1f51-4df0-8e12-57d32947d33e"
 authors = ["ITensor developers <[email protected]> and contributors"]
-version = "0.5.2"
+version = "0.5.3"
 
 [deps]
 Accessors = "7d9f7c33-5ae7-4f3b-8dc6-eff91059b697"
@@ -20,7 +20,7 @@ WignerSymbols = "9f57e263-0b3d-5e2e-b1be-24f2bb48858b"
 
 [compat]
 Accessors = "0.1.42"
-BlockArrays = "1.6"
+BlockArrays = "1.7"
 BlockSparseArrays = "0.7.4"
 GradedArrays = "0.4.14"
 HalfIntegers = "1.6"

src/fusiontensor/fusiontensor.jl

@@ -27,12 +27,6 @@ using TensorProducts: tensor_product
 using TypeParameterAccessors: type_parameters
 
 # =======================================  Misc  ===========================================
-
-function to_blockindexrange(b1::BlockIndexRange{1}, b2::BlockIndexRange{1})
-  t = (b1, b2)
-  return Block(Block.(t))[to_block_indices.(t)...]
-end
-
 function flip_domain(nonflipped_col_axis, nonflipped_trees_to_ranges)
   col_axis = dual(nonflipped_col_axis)
   domain_trees_to_ranges_mapping = Dict(
@@ -93,7 +87,7 @@ function intersect_codomain_domain(
         Iterators.product(codomain_trees_to_ranges_mapping, domain_trees_to_ranges_mapping),
       ),
     ) do t
-      return first.(t) => to_blockindexrange(last.(t)...)
+      return first.(t) => BlockIndexRange(last.(t))
     end,
   )
 end