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Fabien Potencier d6b9011ebf feature #36373 [DI] add syntax to stack decorators (nicolas-grekas)
This PR was merged into the 5.1-dev branch.

Discussion
----------

[DI] add syntax to stack decorators

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | yes
| Deprecations? | no
| Tickets       | Fix #30599
| License       | MIT
| Doc PR        | -

Declare this:
```yaml
services:
    my_stack_of_decorators:
        stack:
            - class: App\ExternalDecorator
            - class: App\InternalDecorator
            - class: App\DecoratoredClass
```

And get this:
![image](https://user-images.githubusercontent.com/243674/78615803-b8c8e580-7872-11ea-95c2-22cb78f88ca8.png)

The PR is now ready with support for Yaml, XML and the PHP-DSL. It needs #36388, #36392 and #36389 to pass, and relates to #36390 to be DX-friendly.

The new syntax now supports composable stacks - i.e stack you can reuse in the middle of another stack.

RIP middleware, simple decorators FTW :)

From the test cases:
```yaml
services:
    reusable_stack:
        stack:
            - class: stdClass
              properties:
                  label: A
                  inner: '@.inner'
            - class: stdClass
              properties:
                  label: B
                  inner: '@.inner'

    concrete_stack:
        stack:
            - parent: reusable_stack
            - class: stdClass
              properties:
                  label: C
```

This will create a service similar to:
```php
(object) [
    'label' => 'A',
    'inner' => (object) [
        'label' => 'B',
        'inner' => (object) [
             'label' => 'C',
        ]
    ],
];
```

When used together with autowiring, this is enough to declare a stack of decorators:
```yaml
services:
    my_processing_stack:
        stack:
            - App\ExternalDecorator: ~
            - App\InternalDecorator: ~
            - App\TheDecoratedClass: ~
```

See fixtures for the other configuration formats.

See also https://twitter.com/nicolasgrekas/status/1248198573998604288

Todo:
- [x] rebase on top of #36388, #36392 and #36389 once they are merged
- [x] test declaring deeper nested stacks

Commits
-------

98eeeae3d1 [DI] add syntax to stack decorators
2020-04-24 11:12:12 +02:00
.github Add the bug label automatically when using the bug issue template 2020-02-18 10:35:58 +01:00
src/Symfony feature #36373 [DI] add syntax to stack decorators (nicolas-grekas) 2020-04-24 11:12:12 +02:00
.appveyor.yml Merge branch '5.0' 2020-04-12 11:49:11 +02:00
.editorconfig Update .editorconfig 2018-09-06 16:22:56 +02:00
.gitignore Run the phpunit-bridge from a PR 2019-08-02 17:46:19 +02:00
.php_cs.dist Merge branch '4.4' 2019-11-05 18:15:52 +01:00
.travis.yml Improve SQS interoperability 2020-04-23 11:05:32 +02:00
CHANGELOG-4.0.md Merge branch '3.4' into 4.1 2018-08-01 18:22:14 +02:00
CHANGELOG-4.1.md updated CHANGELOG for 4.1.10 2019-01-06 17:16:07 +01:00
CHANGELOG-4.2.md updated CHANGELOG for 4.2.10 2019-06-26 16:19:37 +02:00
CHANGELOG-4.3.md updated CHANGELOG for 4.3.10 2020-01-21 14:13:32 +01:00
CHANGELOG-4.4.md updated CHANGELOG for 4.4.7 2020-03-30 16:59:08 +02:00
CHANGELOG-5.0.md Merge branch '5.0' 2020-04-01 08:33:39 +02:00
CODE_OF_CONDUCT.md Added the Code of Conduct file 2018-10-10 03:13:30 -07:00
composer.json Merge branch '5.0' 2020-04-15 18:09:08 +02:00
CONTRIBUTING.md Mention the community review guide 2016-12-18 22:02:35 +01:00
CONTRIBUTORS.md update CONTRIBUTORS for 3.4.39 2020-03-30 08:25:10 +02:00
LICENSE Update year in license files 2020-01-01 12:03:25 +01:00
link Add new packages on the link script 2020-03-04 17:45:35 +01:00
phpunit Revert "[travis][appveyor] don't cache .phpunit" 2020-04-12 11:36:17 +02:00
phpunit.xml.dist [Uid] minor improvements 2020-03-20 20:42:05 +01:00
README.md Improve Symfony description 2019-11-24 19:17:45 +01:00
UPGRADE-5.0.md Remove UPGRADE files for 4.x 2020-04-12 15:08:12 +02:00
UPGRADE-5.1.md feature #36426 [Form] Deprecated unused old ServerParams util (HeahDude) 2020-04-12 15:57:46 +02:00
UPGRADE-6.0.md [#35368] add missing changelog entry 2020-04-21 08:45:37 +02:00

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