pkg> add https://github.com/Gnimuc/CppInterOp.jl.git
julia> using CppInterOp
julia> import CppInterOp as Cpp
julia> create_interpreter()
CppInterOp.CppInterpreter(Ptr{Nothing}(0x0000600001585580))
julia> Cpp.Declare("#include <iostream>")
0
julia> Cpp.Process("""std::cout << 42 << std::endl;""")
42
0