public void GetNumericPowerTest()
{
// pow ( pow ( -a, 3 ), 2 ) => pow ( a, 6 )
E e = E.Pow(E.Pow(E.Negate(E.Num("a")), E.NumConst(3)), E.NumConst(2));
E e1;
bool isNeg;
bool needAbs;
double pow = MultipleOp.GetNumericPower(e, out e1, out isNeg, out needAbs);
Assert.IsTrue(pow == 6);
// pow ( sqrt ( a ), 3 ) => pow ( a, 3 / 2 )
e = E.Pow(E.Sqrt(E.Num("a")), E.NumConst(3));
pow = MultipleOp.GetNumericPower(e, out e1, out isNeg, out needAbs);
Assert.IsTrue(pow == 1.5);
// pow ( pow ( a, 1/4 ), 2 ) => pow ( a, 1 / 2 ) => sqrt ( a )
e = E.Pow(E.Pow(E.Num("a"), E.NumConst(0.25)), E.NumConst(2));
pow = MultipleOp.GetNumericPower(e, out e1, out isNeg, out needAbs);
Assert.IsTrue(pow == 0.5);
// pow ( pow ( -a, 2 ), 1.5 ) => pow ( abs ( a ), 3 )
e = E.Pow(E.Pow(E.Negate(E.Num("a")), E.NumConst(2)), E.NumConst(1.5));
pow = MultipleOp.GetNumericPower(e, out e1, out isNeg, out needAbs);
Assert.IsTrue(pow == 3);
}
public static MultipleOp MultipleOp(MultipleOpKind opKind, params E [] operands)
{
var expr = new MultipleOp(opKind, operands);
if (expr.InferredType == ExpressionType.Undefined)
{
throw new InvalidCastException();
}
return(expr);
}
