std::basic_string_view<CharT,Traits>::begin, std::basic_string_view<CharT,Traits>::cbegin
Min standard notice:
Returns an iterator to the first character of the view.
# Declarations
constexpr const_iterator begin() const noexcept;
(since C++17)
constexpr const_iterator cbegin() const noexcept;
(since C++17)
# Return value
const_iterator to the first character.
# Example
#include <concepts>
#include <string_view>
int main()
{
constexpr std::string_view str_view("abcd");
constexpr auto begin = str_view.begin();
constexpr auto cbegin = str_view.cbegin();
static_assert(
*begin == 'a' and
*cbegin == 'a' and
*begin == *cbegin and
begin == cbegin and
std::same_as<decltype(begin), decltype(cbegin)>);
}