Result::map_err

pub fn map_err<F>(E -> F f) -> Result<T, F>

The same value, or Err(f(error)).

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

Parameters#

Returns#

Result<T, F>

See also#

• Result: The outcome of an operation that can fail: Ok(value) or Err(error).
• 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::err: The Err 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.