i64::wrapping_neg is not stable yet

2026-04-23 10:38:02 +00:00 · 2015-08-06 09:31:37 -07:00
parent b6371f045f
commit 199a02cb68
1 changed files with 3 additions and 1 deletions
@@ -259,7 +259,9 @@ impl<Iter> Deserializer<Iter>
                if pos {
                    visitor.visit_u64(res)
                } else {
-                    let res_i64 = (res as i64).wrapping_neg();
+                    // FIXME: `wrapping_neg` will be stable in Rust 1.2
+                    //let res_i64 = (res as i64).wrapping_neg();
+                    let res_i64 = (!res + 1) as i64;

                    // Convert into a float if we underflow.
                    if res_i64 > 0 {