Hi,
anything of the form

     identifier ( ballanced-token-sequence )

would in principle be good for C, because it can be handled with a macro.

For the identifiers, I think that keywording three or four letter codes is really a bad idea.

This should be "precondition" or similar. People that argue that this is too long, should review the capacities of their IDE.

Thanks
Jens

-- 
Jens Gustedt - INRIA & ICube, Strasbourg, France