Wrong documentation for the DI component

[stof]

The doc of the DI component shows the syntax to reference services in parameters: http://symfony.com/doc/current/components/dependency_injection/parameters.html#syntax-for-referencing-services

However, this does not work. Referencing services in parameters is impossible (parameters are scalars or arrays only, while services are object). Referencing services with such syntax works for arguments

[xabbuh]

@stof What's the reason then to have a "service" type in the XML schema? Is it there to not break BC? Did that ever work?

[stof]

@xabbuh IMO, this is a mistake. If you use it, the loader will work (because it uses the same logic for arguments and parameters), but you will get an exception when dumping the container in the cache telling you that parameters cannot be objects.
I don't think it ever worked

[xabbuh]

@stof What do you think about removing these parts from the XSD then?

[wouterj]

@xabbuh that's a BC break

[stof]

not really given that anyone using type="service" in their XML file is already getting a LogicException later.

[xabbuh]

@wouterj If parsing the XML configuration fails nobody will be able to use it that way.

[xabbuh]

@stof Actually, there is a test ensuring the current behaviour: https://github.com/symfony/symfony/blob/master/src/Symfony/Component/DependencyInjection/Tests/Fixtures/xml/services2.xml#L26 and https://github.com/symfony/symfony/blob/master/src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php#L150

[xabbuh]

However, when the container is finally dumped this will fail at all with an exception message like "you cannot dump a container with parameters that contain references to other services".