ToOwned and AsRef implementation

Hi everybody,

I tried to implement AsRef and ToOwned traits for two structs that hold OsStr/OsString but I can't figure out how to configure lifetimes for it. Could you please tell me is it possible to impl these traits?

Thank you.

pub struct MyStringBuf {
    data: OsString,
    // ... other fields
}
pub struct MyString<'a> {
    data: &'a OsStr,
    // ... other fields
}
impl<'a> AsRef<MyString<'a>> for OsStr {
    fn as_ref(&self) -> &MyString<'a> {
        &MyString { data: self } // lifetime error
    }
}
impl<'a> Borrow<MyString<'a>> for MyStringBuf {
    fn borrow(&self) -> &MyString<'a> {
        &MyString { data: self.data.as_os_str() } // lifetime error
    }
}
impl<'a> ToOwned for MyString<'a> {
    type Owned = MyStringBuf;

    fn to_owned(&self) -> Self::Owned {
        MyStringBuf { data: self.data.to_owned() }
    }
}

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