Portability bug in integral conversion

[Jonathan M Davis]

On Sunday 16 January 2011 19:38:55 Andrei Alexandrescu wrote:
> On 1/16/11 9:32 PM, Graham St Jack wrote:
> > Is the cost of run-time checking really prohibitive?
> 
> Yes. There is no question about that. This is not negotiable.

Well, since it would mean checking a condition every time that you did 
arithmetic, that would likely _at least_ double the cost of doing any 
arithmetic. And particularly since arithmetic is such a basic operation that 
_everything else_ relies on, that could get really expensive, really fast.

Yeah. I don't think that that's negotiable. Absolutely best case, I could see 
adding a compiler flag to enable it for debugging purposes, but it would 
definitely be expensive to do such checks and would be totally unacceptable in 
the release build of a systems programming language.

- Jonathan M Davis