``` let s: String = ... let st: &str = ... let u: &[u8] = ... let b: [u8; 3] = b"foo" let v: Vec<u8> = ... let os: OsString = ... let ost: OsStr = ... From To Use Comment ---- -- --- ------- &str -> String String::from(st) &str -> &[u8] st.as_bytes() &str -> Vec<u8> st.as_bytes().to_owned() via &[u8] &str -> &OsStr OsStr::new(st) String -> &str &s alt. s.as_str() String -> &[u8] s.as_bytes() String -> Vec<u8> s.into_bytes() String -> OsString OsString::from(s) &[u8] -> &str str::from_utf8(u).unwrap() &[u8] -> String String::from_utf8(u).unwrap() &[u8] -> Vec<u8> u.to_owned() &[u8] -> &OsStr OsStr::from_bytes(u) use std::os::unix::ffi::OsStrExt; [u8; 3] -> &[u8] &b[..] byte literal [u8; 3] -> &[u8] "foo".as_bytes() alternative via utf8 literal Vec<u8> -> &str str::from_utf8(&v).unwrap() via &[u8] Vec<u8> -> String String::from_utf8(v) Vec<u8> -> &[u8] &v Vec<u8> -> OsString OsString::from_vec(v) use std::os::unix::ffi::OsStringExt; &OsStr -> &str ost.to_str().unwrap() &OsStr -> String ost.to_os_string().into_string() via OsString .unwrap() &OsStr -> Cow<str> ost.to_string_lossy() Unicode replacement characters &OsStr -> OsString ost.to_os_string() &OsStr -> &[u8] ost.as_bytes() use std::os::unix::ffi::OsStringExt; OsString -> String os.into_string().unwrap() returns original OsString on failure OsString -> &str os.to_str().unwrap() OsString -> &OsStr os.as_os_str() OsString -> Vec<u8> os.into_vec() use std::os::unix::ffi::OsStringExt; ```

https://profpatsch.de/notes/rust-string-conversions

Converting between different String types in Rust 11.11.25

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