Re: [PATCH] avoid useless warning for 'bool <- restricted type' conversion

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On Thu, May 11, 2017 at 9:41 PM, Christopher Li <sparse@xxxxxxxxxxx> wrote:
> On Thu, May 11, 2017 at 9:21 AM, Luc Van Oostenryck
> <luc.vanoostenryck@xxxxxxxxx> wrote:
>> Conversion to bool is special in C since this conversion
>> is essentially the result of the comparison with zero.
>> As such, some operations which are normally unsafe to
>> do with restricted types, like casting to an unrestricted
>> type, are in fact safe to do when converting to bool
>> and issuing a warning in those case is useless, confusing
>> and causes people to add useless casts in the code in
>> order to shut up the warning.
>>
>> Fix this by catching such 'bool <- restricted type' conversion
>> and avoid such warnings.
>
> The change seems fine. However, have you run the test-suite
> with this change? It seems cause some test do not pass.
> I assume it is cause by different error message it will output.

Oh my, sorry.
I *have* run the test-suite but then I've forgotten to commit
the change needed for two test cases.

Thanks for noticing this.

-- Luc
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