Class basic_string

uspace/lib/cpp/include/__bits/string/string.hpp:441–1605

    template<class Char, class Traits, class Allocator>
    class basic_string
    {
        public:
            using traits_type     = Traits;
            using value_type      = typename traits_type::char_type;
            using allocator_type  = Allocator;
            using size_type       = typename allocator_traits<allocator_type>::size_type;
            using difference_type = typename allocator_traits<allocator_type>::difference_type;

            using reference       = value_type&;
            using const_reference = const value_type&;
            using pointer         = typename allocator_traits<allocator_type>::pointer;
            using const_pointer   = typename allocator_traits<allocator_type>::const_pointer;

            using iterator               = pointer;
            using const_iterator         = const_pointer;
            using reverse_iterator       = std::reverse_iterator<iterator>;
            using const_reverse_iterator = std::reverse_iterator<const_iterator>;

            static constexpr size_type npos = -1;

            /**
             * 21.4.2, construct/copy/destroy:
             * TODO: tagged constructor that moves the char*
             *       and use that with asprintf in to_string
             */

            basic_string() noexcept
                : basic_string(allocator_type{})
            { /* DUMMY BODY */ }

            explicit basic_string(const allocator_type& alloc)
                : data_{}, size_{}, capacity_{}, allocator_{alloc}
            {
                /**
                 * Postconditions:
                 *  data() = non-null copyable value that can have 0 added to it.
                 *  size() = 0
                 *  capacity() = unspecified
                 */
                data_ = allocator_.allocate(default_capacity_);
                capacity_ = default_capacity_;
            }

            basic_string(const basic_string& other)
                : data_{}, size_{other.size_}, capacity_{other.capacity_},
                  allocator_{other.allocator_}
            {
                init_(other.data(), size_);
            }

            basic_string(basic_string&& other)
                : data_{other.data_}, size_{other.size_},
                  capacity_{other.capacity_}, allocator_{move(other.allocator_)}
            {
                other.data_ = nullptr;
                other.size_ = 0;
                other.capacity_ = 0;