#include <regex>
#include <concepts>
#include <ranges>
static_assert(std::same_as<std::ranges::iterator_t<std::cmatch>, std::cmatch::iterator>);
static_assert(std::ranges::common_range<std::cmatch>);
static_assert(std::ranges::random_access_range<std::cmatch>);
static_assert(std::ranges::contiguous_range<std::cmatch>);
static_assert(!std::ranges::view<std::cmatch>);
static_assert(std::ranges::sized_range<std::cmatch>);
static_assert(!std::ranges::borrowed_range<std::cmatch>);
static_assert(std::ranges::viewable_range<std::cmatch>);
static_assert(std::same_as<std::ranges::iterator_t<std::cmatch const>, std::cmatch::const_iterator>);
static_assert(std::ranges::common_range<std::cmatch const>);
static_assert(std::ranges::random_access_range<std::cmatch const>);
static_assert(std::ranges::contiguous_range<std::cmatch const>);
static_assert(!std::ranges::view<std::cmatch const>);
static_assert(std::ranges::sized_range<std::cmatch const>);
static_assert(!std::ranges::borrowed_range<std::cmatch const>);
static_assert(!std::ranges::viewable_range<std::cmatch const>);