symfony/symfony — pull request #2786 by jmikola (2011-12-05 06:35:43+00:00)
Title: Refactor exception usage in DependencyInjection component

```
Bug fix: no
Feature addition: no
Backwards compatibility break: yes
Symfony2 tests pass: yes
Fixes the following tickets: -
```

This was something discussed on the mailing list recently and a topic at the last IRC meeting. The DependencyInjection component was what I had in mind while discussing this with @lsmith a few weeks ago, as I found that it already had some local SPL exceptions, which weren't being used directly (only as base classes for the compiler exceptions). This PR replaces uses of core SPL exceptions with the component's equivalents. I've listed it as BC-breaking to be safe, but I don't think it should cause any trouble, since the new exceptions are sub-classes of those originally used.

I purposely avoided changing the exceptions in the dumped PHP container. If we agree that's worth doing, it would be a trivial addition to the PR.