fix eachindex

Author: ogauthe

src/fusiontensor/base_interface.jl

@@ -66,11 +66,8 @@ function Base.deepcopy(ft::FusionTensor)
   )
 end
 
-# TBD eachindex with fusion trees
-# NEED TO DEFINE getindex(::FusionTensor, ::Tuple{SectorFusionTree,SectorFusionTree})
-Base.eachindex(ft::FusionTensor) = keys(trees_block_mapping(ft))
+Base.eachindex(::FusionTensor) = throw(MethodError(eachindex, (FusionTensor,)))
 
-# TBD define getindex(ft, ::AbstractSector) to access matrix block?
 function Base.getindex(ft::FusionTensor, f1::SectorFusionTree, f2::SectorFusionTree)
   charge_matrix = data_matrix(ft)[trees_block_mapping(ft)[f1, f2]]
   return reshape(charge_matrix, charge_block_size(ft, f1, f2))

test/test_basics.jl

@@ -70,6 +70,7 @@ include("setup.jl")
   @test length(ft1) == 30
   @test ndims(ft1) == 2
   @test size(ft1) == tuplemortar(((6,), (5,)))
+  @test_throws MethodError eachindex(ft1)
 
   # copy
   ft2 = copy(ft1)