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Map IndexName to Int for contraction #197

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Merged
mtfishman merged 2 commits into from
Jun 30, 2026
Merged

Map IndexName to Int for contraction #197

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329c0e4
Map IndexName to Int for contraction
mtfishman Jun 30, 2026
6e5eb1a
Remove the TensorAlgebra [sources] pin
mtfishman Jun 30, 2026
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4 changes: 2 additions & 2 deletions 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 = "0.9.0"
version = "0.9.1"
authors = ["ITensor developers <support@itensor.org> and contributors"]

[workspace]
Expand Down Expand Up @@ -52,7 +52,7 @@ Mooncake = "0.4.202, 0.5"
OrderedCollections = "1.6"
Random = "1.10"
SimpleTraits = "0.9.4"
TensorAlgebra = "0.12.4, 0.13"
TensorAlgebra = "0.13.4"
TensorOperations = "5.3.1"
TermInterface = "2"
TupleTools = "1.6"
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6 changes: 6 additions & 0 deletions src/index.jl
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
using Accessors: @set
using Random: AbstractRNG, RandomDevice
using TensorAlgebra: TensorAlgebra as TA
using UUIDs: UUID, uuid4

tagpairstring(pair::Pair) = string(first(pair)) * "=>" * string(last(pair))
Expand Down Expand Up @@ -39,6 +40,11 @@ function uniquename(rng::AbstractRNG, ::Type{<:IndexName})
return IndexName(rng)
end

# Derive contractions on integer labels: an `IndexName` carries an id and a tag dictionary and is
# far costlier to compare than an integer, and deriving a contraction makes several comparison
# passes over the labels. See `TensorAlgebra.label_type`.
TA.label_type(::Type{<:IndexName}) = Int

to_symbol_pair(p::Pair) = Symbol(first(p)) => Symbol(last(p))

# Like `Dict`, accept one or more bare `Pair`s as tags. A `Pair` iterates over
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