The forward_range concept is a refinement of range for which ranges::begin returns a model of forward_iterator.
#include <forward_list>
#include <queue>
#include <ranges>
#include <span>
#include <stack>
#include <tuple>
const char* str{"not a forward range"};
const char str2[] = "a forward range";
static_assert(
std::ranges::forward_range<decltype("a forward range")> &&
!std::ranges::forward_range<decltype(str)> &&
std::ranges::forward_range<decltype(str2)> &&
!std::ranges::forward_range<std::stack<char>> &&
std::ranges::forward_range<std::forward_list<char>> &&
!std::ranges::forward_range<std::tuple<std::forward_list<char>>> &&
std::ranges::forward_range<std::span<char>> &&
!std::ranges::forward_range<std::queue<char>> &&
"");
int main() {}
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