Method insert_for_next_parse

include/boost/parser/parser.hpp:6148–6152

Inserts an entry consisting of a UTF-8 string `str` to match, and an associated attribute `x`, to `*this`. The entry is added for use in all subsequent top-level parses. Subsequent lookups during the current top-level parse will not necessarily match `str`. */

            use in all subsequent top-level parses.  Subsequent lookups during
            the current top-level parse will not necessarily match `str`. */
        void insert_for_next_parse(std::string_view str, T x)
        {
            this->parser_.initial_elements_.push_back(
                std::pair(std::string(str), std::move(x)));
        }

        /** Erases the entry whose UTF-8 match string is `str`, from `*this`.
            The entry will no longer be available for use in all subsequent