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Comment by WildUtah | Hacker News Reader

I still love 'with-open-file and its sisters in LISP. Get that resource in one line and it's guaranteed to be cleaned up right without ever thinking about it again. Then you have total freedom to use it however you want and the results destructure themselves.

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"With" is even better in Python. Exceptions during closing work right. The big problem with RAII is that if anything goes wrong in a destructor, you're in trouble.

You could implement something comparable:

    int main() {
        with_open_file_for_writing("foo.dat", [](FILE* fp) {
            fprintf(fp, "old style I/O, automatically closed\n");
        });

        return 0;
    }

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