No need to use Random string for the list of types in loop, just use T1,T2,T3,...

Author: b-fg

Project.toml

@@ -12,7 +12,6 @@ LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 LoggingExtras = "e6f89c97-d47a-5376-807f-9c37f3926c36"
 Preferences = "21216c6a-2e73-6563-6e65-726566657250"
 Printf = "de0858da-6303-5e67-8744-51eddeeeb8d7"
-Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 Reexport = "189a3867-3050-52da-a836-e630ba90ab69"
 Requires = "ae029012-a4dd-5104-9daa-d747884805df"
 StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
@@ -45,7 +44,6 @@ EllipsisNotation = "1.8"
 ForwardDiff = "^0.10.18"
 KernelAbstractions = "0.9.1"
 LoggingExtras = "1.1"
-Random = "1.11.0"
 Reexport = "^1.2.2"
 Requires = "1.3"
 StaticArrays = "^1.1.0"

src/util.jl

@@ -170,8 +170,7 @@ grab!(sym,ex::Symbol) = union!(sym,[ex])          # grab symbol name
 grab!(sym,ex) = nothing
 rep(ex) = ex
 rep(ex::Expr) = ex.head == :. ? Symbol(ex.args[2].value) : ex
-using Random
-symtypes(sym) = [Symbol.(Random.randstring('A':'Z',4)) for _ in 1:length(sym)]
+symtypes(sym) = [Symbol(:T,i) for i in 1:length(sym)]
 joinsymtype(sym::Symbol,symT::Symbol) = Expr(:(::), sym, symT)
 joinsymtype(sym,symT) = zip(sym,symT) .|> x->joinsymtype(x...)