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* This file is part of the Symfony package.
* (c) Fabien Potencier <>
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
namespace Symfony\Component\DependencyInjection\Loader\Configurator\Traits;
use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
use Symfony\Component\DependencyInjection\Reference;
trait BindTrait
* Sets bindings.
* Bindings map $named or FQCN arguments to values that should be
* injected in the matching parameters (of the constructor, of methods
* called and of controller actions).
* @param string $nameOrFqcn A parameter name with its "$" prefix, or a FQCN
* @param mixed $valueOrRef The value or reference to bind
* @return $this
final public function bind($nameOrFqcn, $valueOrRef)
$valueOrRef = static::processValue($valueOrRef, true);
if (!preg_match('/^(?:(?:array|bool|float|int|string)[ \t]*+)?\$/', $nameOrFqcn) && !$valueOrRef instanceof Reference) {
throw new InvalidArgumentException(sprintf('Invalid binding for service "%s": named arguments must start with a "$", and FQCN must map to references. Neither applies to binding "%s".', $this->id, $nameOrFqcn));
$bindings = $this->definition->getBindings();
$bindings[$nameOrFqcn] = $valueOrRef;
return $this;
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