Method contains

src/module.cpp:65–74

    bit_signal<64> changed{};

    bool contains(instruction_ref ins) const
    {
        if(ins == instructions.end())
            return false;
        auto r = instruction_set.count(std::addressof(*ins)) > 0;
        assert(r == std::any_of(instructions.begin(), instructions.end(), [&](auto&& x) {
                   return std::addressof(x) == std::addressof(*ins);
               }));
        return r;
    }

    template <class... Ts>
    instruction_ref emplace(instruction_ref pos, Ts&&... xs)