Remove cast to char in libserialize::hex

Author: nham

src/libserialize/hex.rs

@@ -112,11 +112,11 @@ impl<'a> FromHex for &'a str {
         for (idx, byte) in self.bytes().enumerate() {
             buf <<= 4;
 
-            match byte as char {
-                'A'..'F' => buf |= byte - b'A' + 10,
-                'a'..'f' => buf |= byte - b'a' + 10,
-                '0'..'9' => buf |= byte - b'0',
-                ' '|'\r'|'\n'|'\t' => {
+            match byte {
+                b'A'..b'F' => buf |= byte - b'A' + 10,
+                b'a'..b'f' => buf |= byte - b'a' + 10,
+                b'0'..b'9' => buf |= byte - b'0',
+                b' '|b'\r'|b'\n'|b'\t' => {
                     buf >>= 4;
                     continue
                 }