@Override
public IExpr evaluate(final IAST ast) {
Validate.checkRange(ast, 2, 3);
IExpr arg = F.evalExpandAll(ast.get(1));
try {
if (arg.isTimes() || arg.isPower()) {
IExpr[] parts = Apart.getFractionalParts(arg);
if (parts != null) {
if (parts[0].isPlus() && parts[1].isPlus()) {
IAST[] numParts = ((IAST) parts[0]).split(new PolynomialPredicate());
IAST[] denParts = ((IAST) parts[1]).split(new PolynomialPredicate());
IExpr denParts0 = F.eval(denParts[0]);
if (!denParts0.equals(F.C1)) {
IExpr[] result = Cancel.cancelGCD(numParts[0], denParts0);
if (result != null) {
return F.Times(
result[0], numParts[1], F.Power(F.Times(result[1], denParts[1]), F.CN1));
}
}
}
}
}
} catch (JASConversionException jce) {
if (Config.DEBUG) {
jce.printStackTrace();
}
}
return arg;
}
public void testHashValueVisitor() {
HashValueVisitor v = new HashValueVisitor(1);
IExpr expr = F.Power(F.Sin(F.Log(F.C1)), F.C2);
int hash = expr.accept(v);
assertEquals(hash, -1895901688);
v.setUp();
expr = F.Power(F.Sin(F.Cos(F.C3)), F.C2);
hash = expr.accept(v);
assertEquals(hash, -1895901688);
v.setUp();
expr = F.Power(F.Sin(F.$p("x")), F.C2);
hash = expr.accept(v);
assertEquals(hash, -1895901688);
v.setUp();
expr = F.Power(F.Cos(F.Sin(F.C3)), F.C2);
hash = expr.accept(v);
assertEquals(hash, -1896372423);
}