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Add an example that depends on is_ascii in a const

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This commit is contained in:
Scott McMurray 2023-05-04 14:46:17 -07:00
parent 370d31b93d
commit 1cfcf71e04
1 changed files with 13 additions and 0 deletions
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13
library/core/src/array/ascii.rs
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@ -4,6 +4,19 @@ use crate::ascii;
impl<const N: usize> [u8; N] {
/// Converts this array of bytes into a array of ASCII characters,
/// or returns `None` if any of the characters is non-ASCII.
///
/// # Examples
///
/// ```
/// #![feature(ascii_char)]
/// #![feature(const_option)]
///
/// const HEX_DIGITS: [std::ascii::Char; 16] =
/// *b"0123456789abcdef".as_ascii().unwrap();
///
/// assert_eq!(HEX_DIGITS[1].as_str(), "1");
/// assert_eq!(HEX_DIGITS[10].as_str(), "a");
/// ```
#[unstable(feature = "ascii_char", issue = "110998")]
#[must_use]
#[inline]