handle storagetype better

Author: lkdvos

src/states/abstractmps.jl

@@ -200,6 +200,8 @@ TensorKit.spacetype(ψtype::Type{<:AbstractMPS}) = spacetype(site_type(ψtype))
 TensorKit.sectortype(ψ::AbstractMPS) = sectortype(typeof(ψ))
 TensorKit.sectortype(ψtype::Type{<:AbstractMPS}) = sectortype(site_type(ψtype))
 
+TensorKit.storagetype(ψtype::Type{<:AbstractMPS}) = storagetype(site_type(ψtype))
+
 """
     left_virtualspace(ψ::AbstractMPS, [pos=1:length(ψ)])
     

src/states/finitemps.jl

@@ -387,9 +387,6 @@ end
 
 site_type(::Type{<:FiniteMPS{A}}) where {A} = A
 bond_type(::Type{<:FiniteMPS{<:Any, B}}) where {B} = B
-function TensorKit.storagetype(::Union{MPS, Type{MPS}}) where {A, MPS <: FiniteMPS{A}}
-    return storagetype(A)
-end
 
 function left_virtualspace(ψ::FiniteMPS, n::Integer)
     checkbounds(ψ, n)