[Cython] Message system refactoring

[Stefan Behnel]

Vitja Makarov, 21.03.2011 11:45:
> Now error/warning messages are stored in global variables at
> Cython.Compiler.Errors

Pyrex legacy. Even the visible warning level is a global variable 
("LEVEL"). That's a very bad interface.


> I think it's much better to move error handling into some object,
> Main.Context for example.
>
> Some benefits:
>   - reduce use of global variables
>   - allow more then one cython compiler instance at the time
>   - make it much easy to implement -Werror
>   - cython directives can affect message system (fast_fail, werror)
>   - messages could be easily sorted

+1

Stefan