v0: replace [0] index access via iterator's next()

klensy · klensy · commit 8112f74205ef · 2021-07-13T00:47:45.000+03:00
diff --git a/src/v0.rs b/src/v0.rs
@@ -41,8 +41,8 @@ pub fn demangle(s: &str) -> Result<(Demangle<'_>, &str), Invalid> {
     };
 
     // Paths always start with uppercase characters.
-    match inner.as_bytes()[0] {
-        b'A'..=b'Z' => {}
+    match inner.bytes().next() {
+        Some(b'A'..=b'Z') => {}
         _ => return Err(Invalid),
     }
 

Original file line number	Diff line number	Diff line change
`@@ -41,8 +41,8 @@ pub fn demangle(s: &str) -> Result<(Demangle<'_>, &str), Invalid> {`
`41`	`41`	`};`
`42`	`42`
`43`	`43`	`// Paths always start with uppercase characters.`
`44`		`- match inner.as_bytes()[0] {`
`45`		`- b'A'..=b'Z' => {}`
	`44`	`+ match inner.bytes().next() {`
	`45`	`+ Some(b'A'..=b'Z') => {}`
`46`	`46`	`_ => return Err(Invalid),`
`47`	`47`	`}`
`48`	`48`