How to store a return string?

1

I am reading files through read_dir function. It returns an iterator of DirEntry.

println!("{:?}", entry.file_name());

here I want to store the entry.file_name() into a String. How do I do it? entry.file_name() returns a OsString.

2

There is OsString::into_string you could use for the conversion.

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3

In full generality you cannot, since a filename can contain arbitrary bytes, depending on your OS, but String must be valid UTF-8 (this is the reason OsStr[ing] exists in the first place). That's why OsString::into_string returns a Result: the conversion may fail.

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4

In addition to what has already been written, depending on your use case, String::from_utf8_lossy() might be a good-enough solution.

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