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Improve code example for Option::unwrap_or_default #102283

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Sep 27, 2022
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Improve code example for Option::unwrap_or_default #102283

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16 changes: 4 additions & 12 deletions library/core/src/option.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -834,20 +834,12 @@ impl<T> Option<T> {
///
/// # Examples
///
/// Converts a string to an integer, turning poorly-formed strings
/// into 0 (the default value for integers). [`parse`] converts
/// a string to any other type that implements [`FromStr`], returning
/// [`None`] on error.
///
/// ```
/// let good_year_from_input = "1909";
/// let bad_year_from_input = "190blarg";
/// // Result::ok() converts a Result<T> to an Option<T>
/// let good_year = good_year_from_input.parse().ok().unwrap_or_default();
/// let bad_year = bad_year_from_input.parse().ok().unwrap_or_default();
/// let x: Option<u32> = None;
/// let y: Option<u32> = Some(12);
///
/// assert_eq!(1909, good_year);
/// assert_eq!(0, bad_year);
/// assert_eq!(x.unwrap_or_default(), 0);
/// assert_eq!(y.unwrap_or_default(), 12);
/// ```
///
/// [default value]: Default::default
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