#include <iostream>
#include <fstream>
#include <algorithm>
using namespace std;
class Foo
{
public:
bool dump_dvars()
{
std::for_each(begin(seq), end(seq),
[this](int) -> void
{
std::cout << output_file.is_open() << '\n';
});
return true;
}
private:
int seq[1];
fstream output_file;
};
int main()
{
Foo foo;
foo.dump_dvars();
}
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