Implement Rational.isNaN

Currently we use Real.isNaN that always gives False, however a Rat can be a NaN when both its numerator and denominator are zeroes.
rakudo · Dec 31, 2016 · 7434a8f · 7434a8f
1 parent 73182d4
commit 7434a8f
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/src/core/Rational.pm b/src/core/Rational.pm
@@ -65,8 +65,12 @@ my role Rational[::NuT, ::DeT] does Real {
     }
 
     method Int() { self.truncate }
-
     method Bridge() { self.Num }
+    method isNaN {
+        nqp::p6bool(
+            nqp::isfalse(self.numerator) && nqp::isfalse(self.denominator)
+        )
+    }
 
     multi method Str(::?CLASS:D:) {
         if nqp::istype($!numerator,Int) {