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Improve code example for Option::unwrap_or_default

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Guillaume Gomez 2022-09-25 23:58:33 +02:00 committed by Guillaume Gomez
parent f5193a9fcc
commit 475aeab79e
1 changed files with 4 additions and 12 deletions
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16
library/core/src/option.rs
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@ -834,20 +834,12 @@ pub const fn unwrap_or_else<F>(self, f: F) -> 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