bug #22657 [DI] Fix Cannot declare class ...\DefinitionDecorator, because the name is already in use (ogizanagi)
bug #22657 [DI] Fix Cannot declare class ...\DefinitionDecorator, because the name is already in use (ogizanagi)

This PR was merged into the 3.3-dev branch.

Discussion
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[DI] Fix Cannot declare class ...\DefinitionDecorator, because the name is already in use

| Q             | A
| ------------- | ---
| Branch?       | 3.3
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #21369
| License       | MIT
| Doc PR        | N/A

The `return` trick doesn't seem to work, and php is still trying to declare the `DefinitionDecorator` class, which causes the "Cannot declare class ...\DefinitionDecorator, because the name is already in use" error because of the `class_alias` previously declared in `ChildDefinition.php`.

This never happens as soon as the `ChildDefinition` class is used first, as the alias will take hand, but their are some situations, like in some unit test cases it can happen apparently, because `DefinitionDecorator` is used first.

Commits
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530849e4b5 [DI] Fix Cannot declare class ...\DefinitionDecorator, because the name is already in use

symfony/dependency-injection,symfony/DependencyInjection