public function __construct(int $line, string $name)
{
parent::__construct($line);
if (false === array_search($name, VARIABLES, true)) {
throw new \UnexpectedValueException("'{$name}' is not one of the defined variables: " . var_export(VARIABLES, true));
}
$this->name = $name;
}
public function __construct(int $line, string $kind, Node $left, Node $right)
{
parent::__construct($line);
if (!isset(OPERATORS[$kind])) {
throw new \UnexpectedValueException("'{$kind}' is not one of the accepted operator types: " . var_export(array_keys(OPERATORS), true));
}
$this->kind = $kind;
$this->left = $left;
$this->right = $right;
}
public function __construct(int $line, string $name, array $arguments)
{
parent::__construct($line);
if (!isset(FUNCTIONS[$name])) {
throw new \UnexpectedValueException("'{$name}' is not one of the accepted functions: " . var_export(array_keys(FUNCTIONS), true));
}
$functionData = FUNCTIONS[$name];
if (count($arguments) !== $functionData['arity']) {
throw new \RangeException("'{$name}' has an arity of {$functionData['arity']}, but " . count($arguments) . " arguments given");
}
foreach ($arguments as $i => $argument) {
if (!$argument instanceof Node) {
throw new \UnexpectedValueException("Argument {$i} is not " . Node::class);
}
}
$this->name = $name;
$this->arguments = $arguments;
}