mapErr<F> method

Result<T, F> mapErr<F>(F mapFn(E))

Maps a Result<T, E> to a Result<T, F> using the given function with the held value.

Returns:

• Ok<T, F> if this Result is Ok<T, E>.
• Err<T, F> if this Result is Err<T, E>.

See also: Rust: Result::map_err()

Implementation

Result<T, F> mapErr<F>(F Function(E) mapFn) => switch (this) {
	Ok(value: T value) => Ok(value),
	Err(value: E value) => Err(mapFn(value))
};