From a93b008fb33cb485f893a3752aa438b271c54935 Mon Sep 17 00:00:00 2001
From: kmp5VT <kmp5@vt.edu>
Date: Fri, 15 Sep 2023 12:21:56 -0400
Subject: [PATCH] Experimental QN itensor constructor, having issues with this

---
 src/itensor/qnitensor.jl | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/itensor/qnitensor.jl b/src/itensor/qnitensor.jl
index 1bcb0f7904..6d7df9d3e9 100644
--- a/src/itensor/qnitensor.jl
+++ b/src/itensor/qnitensor.jl
@@ -261,6 +261,15 @@ ITensor(x::RealOrComplex{Int}, flux::QN, is...) = ITensor(float(x), flux, is...)
 
 ITensor(eltype::Type{<:Number}, x::Number, is::QNIndices) = ITensor(eltype, x, QN(), is)
 
+function ITensor(
+  as::AliasStyle, A::AbstractArray{ElT}, is::QNIndices; kwargs...
+) where {ElT<:Number}
+  @show is
+  tol = haskey(kwargs, :tol) ? kwargs[:tol] : 0.0
+  checkflux = haskey(kwargs, :checkflux) ? kwargs[:checkflux] : true
+  return ITensor(as, ElT, A, is)
+end
+
 """
     ITensor([ElT::Type, ]::AbstractArray, inds; tol=0.0, checkflux=true)