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use std::fs;
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use std::thread;
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fn copy_file() -> thread::Result<()> {
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thread::spawn(|| {
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fs::copy("a.txt", "b.txt").expect("Error occurred");
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})
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.join()
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}
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fn main() {
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match copy_file() {
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Ok(_) => println!("Ok. copied"),
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Err(_) => println!("Error in copying file"),
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}
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} |