Automatic fclose() in C++11

This post is more of a mocking than serious advice, provided that a) STL includes <fstream> header with std::ifstream and std::ofstream classes, that do the same without any additional effort, and b) mixing templates and libC is just plain weird in my book.

C++11 added (among others) std::unique_ptr in <memory>, that uses std::default_delete template functor to free up objects when the pointer leaves its scope. By default, delete operator is called if the pointer is not NULL. But of course, you can always specialize a template:

#include <stdio.h>
#include <memory>

namespace std
{
    template<>
    struct default_delete<FILE>
    {
        void operator()(FILE* __ptr) const { fclose(__ptr); }
    };
}

int main()
{
    std::unique_ptr<FILE> in(fopen("test.txt", "wt"));
    // work with file via in.get() pointer using fwrite() etc.
    // no need to close the file explicitly...
    return 0;
}