Apr 28, 2017 · Apr 12, 2017
diff --git a/service_container/autowiring.rst b/service_container/autowiring.rst

        services:
            rot13_transformer:
                class:            Acme\Rot13Transformer
                autowiring_types: Acme\TransformerInterface
                class: Acme\Rot13Transformer

            Acme\TransformerInterface: '@rot13_transformer'

            twitter_client:
                class:    Acme\TwitterClient
            xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">

            <services>
                <service id="rot13_transformer" class="Acme\Rot13Transformer">
                    <autowiring-type>Acme\TransformerInterface</autowiring-type>
                </service>
                <service id="rot13_transformer" class="Acme\Rot13Transformer" />

                <service id="Acme\TransformerInterface" alias="rot13_transformer" />

                <service id="twitter_client" class="Acme\TwitterClient" autowire="true" />

        use Symfony\Component\DependencyInjection\Definition;

        // ...
        $rot13Definition = new Definition(Rot13Transformer::class);
        $rot13Definition->setAutowiringTypes(array(TransformerInterface::class));
        $container->setDefinition('rot13_transformer', $rot13Definition);
        $container->register('rot13_transformer', Rot13Transformer::class);
        $container->setAlias(TransformerInterface::class, 'rot13_transformer')

        $clientDefinition = new Definition(TwitterClient::class);
        $clientDefinition->setAutowired(true);
      [Symfony\Component\DependencyInjection\Exception\RuntimeException]
      Unable to autowire argument of type "Acme\TransformerInterface" for the service "twitter_client".

 Fortunately, the ``autowiring_types`` key is here to specify which implementation
 to use by default. This key can take a list of types if necessary.
 Fortunately, the FQCN alias is here to specify which implementation
 to use by default.

 .. versionadded:: 3.3
    Using FQCN aliases to fix autowiring ambiguities is allowed since Symfony
    3.3. Prior to version 3.3, you needed to use the ``autowiring_types`` key.

 Thanks to thissetting, the ``rot13_transformer`` service is automatically injected
 Thanks to thisalias, the ``rot13_transformer`` service is automatically injected
 as an argument of the ``uppercase_transformer`` and ``twitter_client`` services. For
 the ``uppercase_twitter_client``, a standard service definition is used to
 inject the specific ``uppercase_transformer`` service.
Original file line number	Diff line number	Diff line change
Expand Up		@@ -307,8 +307,9 @@ and a Twitter client using it:

		services:
		rot13_transformer:
		class: Acme\Rot13Transformer
		autowiring_types: Acme\TransformerInterface
		class: Acme\Rot13Transformer

		Acme\TransformerInterface: '@rot13_transformer'

		twitter_client:
		class: Acme\TwitterClient
Expand All		@@ -330,9 +331,9 @@ and a Twitter client using it:
		xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">

		<services>
		<service id="rot13_transformer" class="Acme\Rot13Transformer">
		<autowiring-type>Acme\TransformerInterface</autowiring-type>
		</service>
		<service id="rot13_transformer" class="Acme\Rot13Transformer" />

		<service id="Acme\TransformerInterface" alias="rot13_transformer" />

		<service id="twitter_client" class="Acme\TwitterClient" autowire="true" />

Expand All		@@ -356,9 +357,8 @@ and a Twitter client using it:
		use Symfony\Component\DependencyInjection\Definition;

		// ...
		$rot13Definition = new Definition(Rot13Transformer::class);
		$rot13Definition->setAutowiringTypes(array(TransformerInterface::class));
		$container->setDefinition('rot13_transformer', $rot13Definition);
		$container->register('rot13_transformer', Rot13Transformer::class);
		$container->setAlias(TransformerInterface::class, 'rot13_transformer')

		$clientDefinition = new Definition(TwitterClient::class);
		$clientDefinition->setAutowired(true);
Expand All		@@ -382,10 +382,14 @@ to use which leads to errors like this:
		[Symfony\Component\DependencyInjection\Exception\RuntimeException]
		Unable to autowire argument of type "Acme\TransformerInterface" for the service "twitter_client".

		Fortunately, the ``autowiring_types`` key is here to specify which implementation
		to use by default. This key can take a list of types if necessary.
		Fortunately, the FQCN alias is here to specify which implementation
		to use by default.

		.. versionadded:: 3.3
		Using FQCN aliases to fix autowiring ambiguities is allowed since Symfony
		3.3. Prior to version 3.3, you needed to use the ``autowiring_types`` key.

		Thanks to thissetting, the ``rot13_transformer`` service is automatically injected
		Thanks to thisalias, the ``rot13_transformer`` service is automatically injected
		as an argument of the ``uppercase_transformer`` and ``twitter_client`` services. For
		the ``uppercase_twitter_client``, a standard service definition is used to
		inject the specific ``uppercase_transformer`` service.
Expand Down