main.cpp

#include <iostream>
#include <string>
#include <ctre.hpp>
int main()
{
    std::string b64_string = "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    constexpr static auto pattern = ctll::fixed_string {"^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$"};
    std::cout << ctre::match<pattern> (b64_string) << std::endl;
    std::cout << "Hello, World!" << std::endl;
    return 0;
}