Jefffrey commented on code in PR #10088:
URL: https://github.com/apache/arrow-rs/pull/10088#discussion_r3441870048
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arrow-buffer/src/bigint/mod.rs:
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@@ -1085,6 +1102,58 @@ impl WrappingNeg for i256 {
}
}
+// num_traits saturating implementations
+
+impl SaturatingAdd for i256 {
+ fn saturating_add(&self, v: &Self) -> Self {
+ self.checked_add(v).unwrap_or_else(|| {
+ if v.is_negative() {
+ i256::MIN
+ } else {
+ i256::MAX
+ }
+ })
+ }
+}
+
+impl SaturatingSub for i256 {
+ fn saturating_sub(&self, v: &Self) -> Self {
+ self.checked_sub(v).unwrap_or_else(|| {
+ if v.is_negative() {
+ i256::MAX
+ } else {
+ i256::MIN
+ }
+ })
+ }
+}
+
+impl SaturatingMul for i256 {
+ fn saturating_mul(&self, v: &Self) -> Self {
+ self.checked_mul(v).unwrap_or_else(|| {
+ if v.is_negative() {
+ i256::MIN
+ } else {
Review Comment:
if self is neg and v is neg then the result would be pos
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