Owl Get a Life

Compile Error

guanine.cpp: In function ‘int main()’:
guanine.cpp:28:11: error: no match for ‘operator==’ (operand types are ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’} and ‘std::string(std::string, std::string)’ {aka ‘std::__cxx11::basic_string<char>(std::__cxx11::basic_string<char>, std::__cxx11::basic_string<char>)’})
28 | if (cmd == ADD_BACK)
| ~~~ ^~ ~~~~~~~~
| | |
| | std::string(std::string, std::string) {aka std::__cxx11::basic_string<char>(std::__cxx11::basic_string<char>, std::__cxx11::basic_string<char>)}
| std::string {aka std::__cxx11::basic_string<char>}
In file included from /usr/include/c++/9/regex:62,
from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:110,
from guanine.cpp:1:
/usr/include/c++/9/bits/regex.h:1026:5: note: candidate: ‘template<class _BiIter> bool std::__cxx11::operator==(const