Method starts_with

include/boost/json/string.hpp:1420–1424

Return whether the string begins with another string. @li **(1)** checks if the string begins with `s`. @li **(2)** checks if the string begins with `ch`. @par Complexity @li **(1)** linear in `s.size()`. @li **(2)** constant. @param s The string to check for. @{ */

        @{
    */
    bool
    starts_with(string_view s) const noexcept
    {
        return subview(0, s.size()) == s;
    }

    /** Overload