pkg> add https://github.com/Gnimuc/CppInterOp.jl.git
julia> using CppInterOp
julia> import CppInterOp as Cpp
julia> I = Cpp.create_interpreter()
CppInterOp.Interpreter(Ptr{CppInterOp.LibCppInterOp.CXInterpreterImpl}(0x0000000156091b00))
julia> Cpp.declare(I, "#include <iostream>")
true
julia> Cpp.process(I, """std::cout << 42 << std::endl;""")
42
true