question regarding new warning

[Manuel López-Ibáñez]

On 27 March 2014 23:37, Daniel Gutson
<daniel.gutson@tallertechnologies.com> wrote:
>>
>> There are some known bugs in -Wconversion and nobody working on them,
>> so if you are still interested in helping, I can give you some hints
>> on where your help will be very welcome.
>
> Could you please go ahead and show me the failing cases?
> I only worked in the backend, but I'd like to take a look to the front-end.

Two "easy" ones:

http://gcc.gnu.org/PR55096 about converting 'false' to bool *.
http://gcc.gnu.org/PR60591 about unsafe enum conversions

There are more, but they are a bit more complicated. If you feel brave
enough, let me know.

> There's also all the other commenters of my post regarding the =- and
> =+ looking-like operators, which should take ws into account.
>

I think it would be a good idea to have a warning for =- and =+ saying
something like:

test.c:4:8: warning: suggested space between '=' and '-' to avoid
confusion with operator '-='
      x =- 4;
         ^

Clang already warns about this:

test.c:4:7: warning: use of unary operator that may be intended as
compound assignment (+=)
    x =+ 4;
      ^~

I think this should be easy to implement during parsing for both C and
C++, so you may want to start with this one.

Cheers,

Manuel.