public function testTree4()
{
$deriver = new DerivationVisitor('x');
$eval = new EvaluationVisitor(['x' => 2]);
Tree::init(3)->mult(Tree::init('x')->pow(2))->add(Tree::init(2)->mult('x')->add(3));
$f = Tree::mult(3, Tree::pow('x', 2))->add(Tree::mult(2, 'x'))->add(3);
$this->assertEquals(19, $eval->visit($f));
$this->assertEquals(14, $eval->visit($deriver->visit($f)));
}
/**
* @return SimplifyVisitor
*/
public function testVisitor4()
{
$visitor = new TypeVisitor(VariableNode::class);
$this->assertFalse($visitor->visit(Tree::add(2, 3)));
$this->assertFalse($visitor->visit(Tree::pow(2, 3)));
$this->assertFalse($visitor->visit(Tree::mult(2, 3)));
$this->assertFalse($visitor->visit(Tree::init(3)));
$this->assertTrue($visitor->visit(Tree::init('x')));
}
public function visitPowerNode(PowerNode $node)
{
$a = $this->visit($node->getBase());
$b = $this->visit($node->getExponent());
//TODO REMOVE
if ($this->isZeroVisitor->visit($a)) {
return Tree::init(0);
}
if ($this->isZeroVisitor->visit($b)) {
return Tree::init(1);
}
if ($this->isOneVisitor->visit($b)) {
return $a;
}
return new PowerNode($a, $b);
}
