Function dynamic_unique_ptr_cast

generative/io/tgf-graph-reader.cpp:40–48

// deleter.
template<typename Derived_t, typename Base_t>
static std::unique_ptr<Derived_t> dynamic_unique_ptr_cast(std::unique_ptr<Base_t>&& p)
{
    if (auto* result = dynamic_cast<Derived_t*>(p.get()))
    {
        (void)p.release();
        return std::unique_ptr<Derived_t>(result);
    }
    return std::unique_ptr<Derived_t>(nullptr);
}

static std::string trim(const std::string& str, const std::string& whitespace = " \t\n")
{