rational: don't flip if null

Fixes issue where flipped rationals would erroneously create a NaN. Fixes #1641 Fixes #1642
2021-05-24 16:04:46 +10:00
parent ef31c3fb1a
commit 4de0a72786
1 changed files with 3 additions and 1 deletions
@@ -142,7 +142,9 @@ rational rational::flipped() const

 void rational::flip()
 {
-  std::swap(denom_, numer_);
+  if (!isNull()) {
+    std::swap(denom_, numer_);
+  }
 }

 bool rational::isNull() const