Parsing C++ expression statements about lexy HOT 1 CLOSED

    struct expression_statement
    {
        static constexpr auto rule = [] {
            auto key_condition = dsl::lookahead(dsl::semicolon, dsl::lit_c<'}'>));
            return key_condition >> dsl::terminator(dsl::semicolon)(dsl::p<expression>);
        }();

        static constexpr auto value = lexy::callback<ast_node_ptr>(
            [](ast_node_ptr &&expr) { return std::make_unique<ast::expression_statement>(std::move(expr)); });
    };