additional_reason_my_assert.cpp

#include <sstream>
#include <stdexcept>

class MyAssertionFailed : public std::runtime_error {
public:
    explicit MyAssertionFailed(const std::string& what)
        : std::runtime_error(what) {}
};

class LocalLogStream {
    std::ostringstream stream_;
public:
    LocalLogStream(const char* head_message, const char* func, const char* file, int line) {
        stream_ << head_message << ' ' << func << " at" << file << ':' << line << ' ';
    }
    
    ~LocalLogStream() noexcept(false) {
        throw MyAssertionFailed(stream_.str());
    }

    template <class T>
    LocalLogStream& operator<<(const T& x) {
        stream_ << x;
        return *this;
    }
};

#define MY_ASSERT(cond) if (cond) {} else LocalLogStream{"assertion failed " # cond, __func__, __FILE__, __LINE__}

int main() {
    bool my_cond = false;
    MY_ASSERT(my_cond) << "invalid argument";
    MY_ASSERT(my_cond);
}