operators refactoring

1-tests/Just.PreciseMath.Tests/PreciseMathExpTests.cs

@@ -16,7 +16,7 @@ public class PreciseMathExpTests
         // Inputs are exact stored binary64 sums, not rounded irrational constants.
         DoubleDouble input = DoubleDouble.FromComponents(high, low);
         (Units(input.High) + Units(input.Low)).ShouldBe(Units(high) + Units(low));
-        DoubleDouble actual = DDMath.Exp(input);
+        DoubleDouble actual = DoubleDouble.Exp(input);
         DoubleDouble.IsCanonical(actual).ShouldBeTrue();
         if (overflow)
         {
@@ -60,7 +60,7 @@ public class PreciseMathExpTests
     {
         // Independently round Decimal.exp(exact binary64 input)/2^-1074 to an
         // integer at 180 digits. Pin more than the general one-subnormal bound.
-        DoubleDouble actual = DDMath.Exp(new DoubleDouble(input));
+        DoubleDouble actual = DoubleDouble.Exp(new DoubleDouble(input));
         BitConverter.DoubleToInt64Bits(actual.High).ShouldBe(expectedBits);
         BitConverter.DoubleToInt64Bits(actual.Low).ShouldBe(0L);
     }
@@ -70,7 +70,7 @@ public class PreciseMathExpTests
     [InlineData(709.781)]
     public void LegacyFiniteResultsDoNotOverflowPrematurely(double input)
     {
-        DoubleDouble actual = DDMath.Exp(new DoubleDouble(input));
+        DoubleDouble actual = DoubleDouble.Exp(new DoubleDouble(input));
         DoubleDouble.IsFinite(actual).ShouldBeTrue();
         actual.Low.ShouldNotBe(0.0);
         // Component-aware accuracy for these exact inputs is pinned by ReferenceCases.
@@ -83,7 +83,7 @@ public class PreciseMathExpTests
             double.MaxValue, double.MinValue];
         foreach (double input in inputs)
         {
-            DoubleDouble actual = DDMath.Exp(new DoubleDouble(input));
+            DoubleDouble actual = DoubleDouble.Exp(new DoubleDouble(input));
             double expected = Math.Exp(input);
             BitConverter.DoubleToInt64Bits(actual.High).ShouldBe(
                 BitConverter.DoubleToInt64Bits(double.IsNaN(expected) ? double.NaN : expected));