From 63a7062729bb082312b9b7081f8287ff74104386 Mon Sep 17 00:00:00 2001
From: mtfishman <mfishman@flatironinstitute.org>
Date: Thu, 18 Sep 2025 16:29:41 -0400
Subject: [PATCH 1/2] Improve randname and Index constructors

---
 Project.toml |  2 ++
 src/index.jl | 20 +++++++++++++++++---
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/Project.toml b/Project.toml
index bc72489..ccb798b 100644
--- a/Project.toml
+++ b/Project.toml
@@ -10,6 +10,7 @@ FillArrays = "1a297f60-69ca-5386-bcde-b61e274b549b"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 MapBroadcast = "ebd9b9da-f48d-417c-9660-449667d60261"
 NamedDimsArrays = "60cbd0c0-df58-4cb7-918c-6f5607b73fde"
+Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 TensorAlgebra = "68bd88dc-f39d-4e12-b2ca-f046b68fcc6a"
 UnallocatedArrays = "43c9e47c-e622-40fb-bf18-a09fc8c466b6"
 UnspecifiedTypes = "42b3faec-625b-4613-8ddc-352bf9672b8d"
@@ -34,6 +35,7 @@ GradedArrays = "0.4"
 LinearAlgebra = "1.10"
 MapBroadcast = "0.1.5"
 NamedDimsArrays = "0.7"
+Random = "1.10"
 SparseArraysBase = "0.7"
 TensorAlgebra = "0.3, 0.4"
 UnallocatedArrays = "0.1.1"
diff --git a/src/index.jl b/src/index.jl
index 1e280e6..52e7b56 100644
--- a/src/index.jl
+++ b/src/index.jl
@@ -9,6 +9,7 @@ using NamedDimsArrays:
   name,
   randname,
   setname
+using Random: Random, AbstractRNG
 
 tagpairstring(pair::Pair) = repr(first(pair)) * "=>" * repr(last(pair))
 function tagsstring(tags::Dict{String,String})
@@ -24,10 +25,15 @@ struct IndexName <: AbstractName
   tags::Dict{String,String}
   plev::Int
 end
-function IndexName(; id::UInt64=rand(UInt64), tags=Dict{String,String}(), plev::Int=0)
+function IndexName(
+  rng::AbstractRNG=Random.default_rng();
+  id::UInt64=rand(rng, UInt64),
+  tags=Dict{String,String}(),
+  plev::Int=0,
+)
   return IndexName(id, Dict{String,String}(tags), plev)
 end
-NamedDimsArrays.randname(n::IndexName) = IndexName()
+NamedDimsArrays.randname(rng::AbstractRNG, ::Type{<:IndexName}) = IndexName(rng)
 
 id(n::IndexName) = n.id
 tags(n::IndexName) = n.tags
@@ -81,8 +87,16 @@ struct Index{T,Value<:AbstractUnitRange{T}} <: AbstractNamedUnitRange{T,Value,In
   name::IndexName
 end
 
+function Index{T,Value}(
+  r::AbstractUnitRange{T}; kwargs...
+) where {T,Value<:AbstractUnitRange{T}}
+  return Index{T,Value}(r, IndexName(; kwargs...))
+end
+function Index{T}(r::AbstractUnitRange{T}; kwargs...) where {T}
+  return Index{T,typeof(r)}(r; kwargs...)
+end
 function Index(r::AbstractUnitRange; kwargs...)
-  return Index(r, IndexName(; kwargs...))
+  return Index{eltype(r)}(r; kwargs...)
 end
 
 function Index(length::Int; kwargs...)

From f4c4ce39740d7eea1c2913420c42b2515d3125d3 Mon Sep 17 00:00:00 2001
From: Matt Fishman <mtfishman@users.noreply.github.com>
Date: Thu, 18 Sep 2025 17:27:57 -0400
Subject: [PATCH 2/2] Bump version from 0.2.11 to 0.2.12

---
 Project.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Project.toml b/Project.toml
index ccb798b..a764b45 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "ITensorBase"
 uuid = "4795dd04-0d67-49bb-8f44-b89c448a1dc7"
 authors = ["ITensor developers <support@itensor.org> and contributors"]
-version = "0.2.11"
+version = "0.2.12"
 
 [deps]
 Accessors = "7d9f7c33-5ae7-4f3b-8dc6-eff91059b697"