Method is_string

include/boost/json/value.hpp:1223–1227

Check if this is a @ref string. Returns `true` if the value's @ref kind() is `kind::string`. @returns `this->kind() == kind::string`. @par Complexity Constant. @par Exception Safety No-throw guarantee. */

        No-throw guarantee.
    */
    bool
    is_string() const noexcept
    {
        return kind() == json::kind::string;
    }

    /** Check if this is a `std::int64_t`.