Function to_vec 

pub fn to_vec<T>(value: &T) -> Result<Vec<u8>>
where
    T: ?Sized + Serialize,

Serializes an instance of T into a new Vec as Bencode data.

Errors

Serialization can fail if T’s implemenation of Serialize decides to fail, if T contains unsupported types for serialization, or if T contains a map with non-string keys.