file i/o in a variety of languages

[bearophile]

Jesse Phillips:
> I'm assuming the file.open() function will close any open file. When does your suggestion close the file?

If you write:

auto f = File("foo.txt", "w");
f = File("bar.txt", "r");

I think the first file will be closed, thanks to the reference counter.
My complete version was:

import std.stdio: write, File;

void main() {
    auto f = File("fileio.txt", "w");
    f.writeln("hello");
    f.writeln("world");
    f.close();

    f = File("fileio.txt", "r");
    f.readln();
    auto s = f.readln(); // as required
    write(s);
    f.close(); // optional
}

Bye,
bearophile