Method erase

include/boost/parser/parser.hpp:5371–5380

            of the symbol table inside the parse context `context`. */
        template<typename Context>
        void erase(Context const & context, std::string_view str) const
        {
            auto [trie, has_case_folded] = detail::get_trie(context, ref());
            if (context.no_case_depth_) {
                trie.erase(
                    detail::case_fold_view(str | detail::text::as_utf32));
            } else {
                trie.erase(str | detail::text::as_utf32);
            }
        }

        /** Erases the entry whose UTF-8 match string is `str` from the copy
            of the symbol table inside the parse context `context`. */