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Re: [RFC] Deprecate "implicit int" for main() in C++
On 04/25/2018 03:04 PM, Jonathan Wakely wrote:
> On 25/04/18 14:59 +0100, Andrew Haley wrote:
>> On 04/25/2018 02:56 PM, Jason Merrill wrote:
>>> The warning by default seems sufficient to me.
>>
>> Yes. We've been bitten by this a few times, with mysterious crashes.
>> I'm not sure it even makes sense only to be a warning, but I guess
>> that's up to the C++ TC.
>
> It's not always possible for the compiler to prove that flowing off
> the end never happens, even if the program state ensures that it can't
> (e.g. by all callers enforcing the function's preconditions
> correctly). So making it ill-formed is deemed too draconian whenever
> this gets discussed.
Sure. Having said that, the cases that bit me were those where control
always flowed off the end, i.e. the function contained no return statement.
--
Andrew Haley
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
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