Rollup merge of rust-lang#132242 - ultrabear:const_is_digit, r=scottmcm

Support `char::is_digit` in const contexts. This PR implements [`feature(const_char_is_digit)` rust-lang#132241](rust-lang#132241)
jieyouxu · Oct 28, 2024 · f14637b · f14637b
2 parents a9ee1d0 + 66209cd
commit f14637b
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/library/core/src/char/methods.rs b/library/core/src/char/methods.rs
@@ -320,8 +320,9 @@ impl char {
     /// '1'.is_digit(37);
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
+    #[rustc_const_unstable(feature = "const_char_is_digit", issue = "132241")]
     #[inline]
-    pub fn is_digit(self, radix: u32) -> bool {
+    pub const fn is_digit(self, radix: u32) -> bool {
         self.to_digit(radix).is_some()
     }