Avoid evaluating $c more than once in overflow macro

serde-rs · Dec 31, 2021 · 18a88da · 18a88da
1 parent 5d2cbcd
commit 18a88da
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/de.rs b/src/de.rs
@@ -93,7 +93,9 @@ impl<'a> Deserializer<read::StrRead<'a>> {
 
 macro_rules! overflow {
     ($a:ident * 10 + $b:ident, $c:expr) => {
-        $a >= $c / 10 && ($a > $c / 10 || $b > $c % 10)
+        match $c {
+            c => $a >= c / 10 && ($a > c / 10 || $b > c % 10),
+        }
     };
 }