make LabelledArrays an extension

Project.toml

@@ -26,6 +26,12 @@ TermInterface = "8ea1fca8-c5ef-4a55-8b96-4e9afe9c9a3c"
 TimerOutputs = "a759f4b9-e2f1-59dc-863e-4aeb61b1ea8f"
 Unityper = "a7c27f48-0311-42f6-a7f8-2c11e75eb415"
 
+[weakdeps]
+LabelledArrays = "2ee39098-c373-598a-b85f-a56591580800"
+
+[extensions]
+SymbolicUtilsLabelledArraysExt = "LabelledArrays"
+
 [compat]
 AbstractTrees = "0.4"
 Bijections = "0.1.2"
@@ -51,6 +57,7 @@ julia = "1.3"
 [extras]
 BenchmarkTools = "6e4b80f9-dd63-53aa-95a3-0cdb28fa8baf"
 Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
+LabelledArrays = "2ee39098-c373-598a-b85f-a56591580800"
 Pkg = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
 PkgBenchmark = "32113eaa-f34f-5b0d-bd6c-c81e245fc73d"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
@@ -59,4 +66,4 @@ Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 Zygote = "e88e6eb3-aa80-5325-afca-941959d7151f"
 
 [targets]
-test = ["BenchmarkTools", "Documenter", "Pkg", "PkgBenchmark", "Random", "ReferenceTests", "Test", "Zygote"]
+test = ["BenchmarkTools", "Documenter", "LabelledArrays", "Pkg", "PkgBenchmark", "Random", "ReferenceTests", "Test", "Zygote"]

ext/SymbolicUtilsLabelledArraysExt.jl

@@ -0,0 +1,25 @@
+module SymbolicUtilsLabelledArraysExt
+
+using LabelledArrays
+using LabelledArrays.StaticArrays
+using SymbolicUtils
+
+@inline function SymbolicUtils.Code.create_array(A::Type{<:SLArray}, T, nd::Val, d::Val{dims}, elems...) where {dims}
+    a = SymbolicUtils.Code.create_array(SArray, T, nd, d, elems...)
+    if nfields(dims) === ndims(A)
+        similar_type(A, eltype(a), Size(dims))(a)
+    else
+        a
+    end
+end
+
+@inline function SymbolicUtils.Code.create_array(A::Type{<:LArray}, T, nd::Val, d::Val{dims}, elems...) where {dims}
+    data = SymbolicUtils.Code.create_array(Array, T, nd, d, elems...)
+    if nfields(dims) === ndims(A)
+        LArray{eltype(data),nfields(dims),typeof(data),LabelledArrays.symnames(A)}(data)
+    else
+        data
+    end
+end
+
+end

src/code.jl

@@ -1,6 +1,6 @@
 module Code
 
-using StaticArrays, LabelledArrays, SparseArrays, LinearAlgebra, NaNMath, SpecialFunctions
+using StaticArrays, SparseArrays, LinearAlgebra, NaNMath, SpecialFunctions
 
 export toexpr, Assignment, (←), Let, Func, DestructuredArgs, LiteralExpr,
        SetArray, MakeArray, MakeSparseArray, MakeTuple, AtIndex,
@@ -578,25 +578,6 @@ end
     MArray{Tuple{dims...}, T}(elems...)
 end
 
-## LabelledArrays
-@inline function create_array(A::Type{<:SLArray}, T, nd::Val, d::Val{dims}, elems...) where {dims}
-    a = create_array(SArray, T, nd, d, elems...)
-    if nfields(dims) === ndims(A)
-        similar_type(A, eltype(a), Size(dims))(a)
-    else
-        a
-    end
-end
-
-@inline function create_array(A::Type{<:LArray}, T, nd::Val, d::Val{dims}, elems...) where {dims}
-    data = create_array(Array, T, nd, d, elems...)
-    if nfields(dims) === ndims(A)
-        LArray{eltype(data),nfields(dims),typeof(data),LabelledArrays.symnames(A)}(data)
-    else
-        data
-    end
-end
-
 ## We use a separate type for Sparse Arrays to sidestep the need for
 ## iszero to be defined on the expression type
 @matchable struct MakeSparseArray{S<:AbstractSparseArray}