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<?php declare(strict_types=1);
namespace PhpParser\Node\Expr;
use PhpParser\Node\Arg;
use PhpParser\Node\Expr;
use PhpParser\Node\VariadicPlaceholder;
abstract class CallLike extends Expr {
/**
* Return raw arguments, which may be actual Args, or VariadicPlaceholders for first-class
* callables.
*
* @return array<Arg|VariadicPlaceholder>
*/
abstract public function getRawArgs(): array;
/**
* Returns whether this call expression is actually a first class callable.
*/
public function isFirstClassCallable(): bool {
$rawArgs = $this->getRawArgs();
return count($rawArgs) === 1 && current($rawArgs) instanceof VariadicPlaceholder;
}
/**
* Assert that this is not a first-class callable and return only ordinary Args.
*
* @return Arg[]
*/
public function getArgs(): array {
assert(!$this->isFirstClassCallable());
return $this->getRawArgs();
}
/**
* Retrieves a specific argument from the raw arguments.
*
* Returns the named argument that matches the given `$name`, or the
* positional (unnamed) argument that exists at the given `$position`,
* otherwise, returns `null` for first-class callables or if no match is found.
*/
public function getArg(string $name, int $position): ?Arg {
if ($this->isFirstClassCallable()) {
return null;
}
foreach ($this->getRawArgs() as $i => $arg) {
if ($arg->unpack) {
continue;
}
if (
($arg->name !== null && $arg->name->toString() === $name)
|| ($arg->name === null && $i === $position)
) {
return $arg;
}
}
return null;
}
}
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