add Adapt extension

Author: lkdvos

Project.toml

@@ -15,7 +15,14 @@ TensorOperations = "6aa20fa7-93e2-5fca-9bc0-fbd0db3c71a2"
 TupleTools = "9d95972d-f1c8-5527-a6e0-b4b365fa01f6"
 VectorInterface = "409d34a3-91d5-4945-b6ec-7529ddf182d8"
 
+[weakdeps]
+Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
+
+[extensions]
+BlockTensorKitAdaptExt = "Adapt"
+
 [compat]
+Adapt = "4"
 Aqua = "0.8"
 BlockArrays = "1"
 Combinatorics = "1"
@@ -34,6 +41,7 @@ VectorInterface = "0.4.8, 0.5"
 julia = "1.10"
 
 [extras]
+Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
 Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"
 Combinatorics = "861a8166-3701-5b0c-9a16-15d98fcdc6aa"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
@@ -42,4 +50,4 @@ Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 TestExtras = "5ed8adda-3752-4e41-b88a-e8b09835ee3a"
 
 [targets]
-test = ["Test", "TestExtras", "Random", "Combinatorics", "SafeTestsets", "Aqua"]
+test = ["Test", "TestExtras", "Random", "Combinatorics", "SafeTestsets", "Aqua", "Adapt"]

ext/BlockTensorKitAdaptExt.jl

@@ -0,0 +1,17 @@
+module BlockTensorKitAdaptExt
+
+using TensorKit
+using BlockTensorKit
+using Adapt
+
+function Adapt.adapt_structure(to, x::BlockTensorMap)
+    data′ = map(adapt(to), x.data)
+    return BlockTensorMap(data′, space(x))
+end
+
+function Adapt.adapt_structure(to, x::SparseBlockTensorMap)
+    data′ = Dict(I => adapt(to, v) for (I, v) in x.data)
+    return SparseBlockTensorMap(data′, space(x))
+end
+
+end