error

nk@f3lix:~/Tutorials/cpp$ clang++ -std=c++17 fold_expressions.cpp -o fold_expressions -O3
fold_expressions.cpp:8:29: error: expected ')'
    (vect.push_back(params) ...);
                            ^
fold_expressions.cpp:8:5: note: to match this '('
    (vect.push_back(params) ...);
    ^
fold_expressions.cpp:8:6: error: expression contains unexpanded parameter pack 'params'
    (vect.push_back(params) ...);
     ^              ~~~~~~
2 errors generated.