Function write_ptr

include/fmt/format.h:1706–1715

template <typename Char, typename OutputIt, typename UIntPtr>
auto write_ptr(OutputIt out, UIntPtr value, const format_specs<Char>* specs) -> OutputIt {
    int num_digits = count_digits<4>(value);
    auto size = to_unsigned(num_digits) + size_t(2);
    auto write = [=](reserve_iterator<OutputIt> it) {
        *it++ = static_cast<Char>('0');
        *it++ = static_cast<Char>('x');
        return format_uint<4, Char>(it, value, num_digits);
    };
    return specs ? write_padded<align::right>(out, *specs, size, write) : base_iterator(out, write(reserve(out, size)));
}

// Returns true iff the code point cp is printable.
FMT_API auto is_printable(uint32_t cp) -> bool;