Result::err

pub fn err() -> Option<E>

The Err value as an Option.

Called on a Result value as value.err(…).

Returns#

Option<E>

See also#

• Result
• Option
• Result::is_ok: True when this is Ok.
• Result::is_err: True when this is Err.
• Result::ok: The Ok value as an Option.
• Result::unwrap_or: The Ok value, or fallback on Err.
• Result::unwrap_or_else: The Ok value, or f applied to the error.
• Result::map: Ok(f(value)), or the same error.