public function resolve(Phi $vertex, GraphState $state)
{
$types = [];
foreach ($vertex->getVariables() as $value) {
$types[] = $value->getType()->getType();
}
$types = array_unique($types);
switch (count($types)) {
case 1:
if ($types[0] !== Type::TYPE_UNKNOWN || 0 === count($vertex->getValues())) {
// resolve variables to result
$this->removePhi($vertex, $state);
return true;
}
break;
case 2:
if (in_array(Type::TYPE_NUMERIC, $types)) {
if (in_array(Type::TYPE_LONG, $types) || in_array(Type::TYPE_DOUBLE, $types)) {
$this->removePhi($vertex, $state);
return true;
} elseif (in_array(Type::TYPE_BOOLEAN, $types)) {
$vertex->getResult()->setType(new Type(Type::TYPE_NUMERIC));
$this->removePhi($vertex, $state);
return true;
}
}
break;
}
return false;
}
/**
* @covers ::replaceVariable
*/
public function testReplaceVariablesNeither()
{
$phi = new Phi($r = new Variable());
$phi->addValue($a = new Variable());
$phi->addValue($b = new Variable());
$phi->replaceVariable(new Variable(), new Variable());
$this->assertSame([$r, $a, $b], $phi->getVariables());
}