Файл: vendor/laravel/framework/src/Illuminate/Support/Traits/ReflectsClosures.php
Строк: 87
<?php
namespace IlluminateSupportTraits;
use Closure;
use IlluminateSupportReflector;
use ReflectionFunction;
use RuntimeException;
trait ReflectsClosures
{
/**
* Get the class name of the first parameter of the given Closure.
*
* @param Closure $closure
* @return string
*
* @throws ReflectionException
* @throws RuntimeException
*/
protected function firstClosureParameterType(Closure $closure)
{
$types = array_values($this->closureParameterTypes($closure));
if (! $types) {
throw new RuntimeException('The given Closure has no parameters.');
}
if ($types[0] === null) {
throw new RuntimeException('The first parameter of the given Closure is missing a type hint.');
}
return $types[0];
}
/**
* Get the class names of the first parameter of the given Closure, including union types.
*
* @param Closure $closure
* @return array
*
* @throws ReflectionException
* @throws RuntimeException
*/
protected function firstClosureParameterTypes(Closure $closure)
{
$reflection = new ReflectionFunction($closure);
$types = collect($reflection->getParameters())->mapWithKeys(function ($parameter) {
if ($parameter->isVariadic()) {
return [$parameter->getName() => null];
}
return [$parameter->getName() => Reflector::getParameterClassNames($parameter)];
})->filter()->values()->all();
if (empty($types)) {
throw new RuntimeException('The given Closure has no parameters.');
}
if (isset($types[0]) && empty($types[0])) {
throw new RuntimeException('The first parameter of the given Closure is missing a type hint.');
}
return $types[0];
}
/**
* Get the class names / types of the parameters of the given Closure.
*
* @param Closure $closure
* @return array
*
* @throws ReflectionException
*/
protected function closureParameterTypes(Closure $closure)
{
$reflection = new ReflectionFunction($closure);
return collect($reflection->getParameters())->mapWithKeys(function ($parameter) {
if ($parameter->isVariadic()) {
return [$parameter->getName() => null];
}
return [$parameter->getName() => Reflector::getParameterClassName($parameter)];
})->all();
}
}