vim-script_test-parser.vim.txt

<token_desc> token{
    <left>{
        ast;
        pls;
    }
    l_pare, r_pare;
    id<type_id>;
}

<grammar> grammar{
    E<type_expr>
        : [make_pls] E pls E
        | [make_mlt] E ast E
        | [make_exp] l_pare E r_pare
        | [make_id]  id
        ;
}