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mtfishman merged 1 commit into from
Oct 27, 2026
+6 −2
Merged

Infer the axes of an ITensor #277

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2 changes: 1 addition & 1 deletion Project.toml
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
name = "ITensorBase"
uuid = "4795dd04-0d67-49bb-8f44-b89c448a1dc7"
version = "0.16.3"
version = "0.16.4"
authors = ["ITensor developers <support@itensor.org> and contributors"]

[workspace]
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6 changes: 5 additions & 1 deletion src/abstractnamedtensor.jl
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Expand Up @@ -251,8 +251,12 @@ Base.Array{<:Any, N}(a::AbstractNamedTensor) where {N} = Array{eltype(a), N}(a)
# Read the parent's axes through TensorAlgebra's interface (not `Base.axes`) so a non-array
# backend like a TensorMap, whose axes are its native spaces, is supported.
function Base.axes(a::AbstractNamedTensor)
return NamedUnitRange.(TensorAlgebra.axes(unnamed(a)), Tuple(names(a)))
return namedaxes(TensorAlgebra.axes(unnamed(a)), names(a))
end
# A function barrier: an `ITensor`'s parent is untyped, so its axes are only known at runtime.
# The names are indexed by position rather than converted with `Tuple`, since they may be stored
# in a `Vector` whose length is unknown to the compiler.
namedaxes(axs::Tuple, ns) = ntuple(i -> NamedUnitRange(axs[i], ns[i]), Val(length(axs)))
function Base.size(a::AbstractNamedTensor)
return length.(axes(a))
end
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