[Bug c++/5310] Weird warnings about using (int)NULL

[manu at gcc dot gnu dot org]

------- Comment #5 from manu at gcc dot gnu dot org  2007-05-23 01:49 -------
(In reply to comment #3)

>    (3) since __null is of type int, the cast to int was a no-op, and
>        since the C++ front-end currently does not have a high level
>        representation of the program (e.g. lowering is done as part of
>        parsing), it does not have ways to make the difference.
> 

Where is lowering performed? It actually seems that the cast (long)__null is
performed somewhere (where?) while parsing, while (int)__null is just accepted
as __null. I tried to follow up the code with just long i = (long) __null; but
the C++ front-end is impossible to debug for me. It just jumps again and again
to the same places. Is there any trick to debug this kind of thing?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=5310