Same instructions, but simpler.

rust-lang · Jan 26, 2021 · a623ea5 · a623ea5
1 parent c07e558
commit a623ea5
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/library/core/src/str/iter.rs b/library/core/src/str/iter.rs
@@ -47,7 +47,7 @@ impl<'a> Iterator for Chars<'a> {
     #[inline]
     fn count(self) -> usize {
         // length in `char` is equal to the number of non-continuation bytes
-        self.iter.map(|&byte| !utf8_is_cont_byte(byte) as usize).sum()
+        self.iter.filter(|&&byte| !utf8_is_cont_byte(byte)).count()
     }
 
     #[inline]