assert and static assert and code generatio

Steven Schveighoffer schveiguy at gmail.com
Wed Jun 14 15:53:01 UTC 2023


On 6/14/23 11:23 AM, Cecil Ward wrote:

> What if I say something like assert( x < 100 ); and let’s say I’m giving 
> the compiler information in the maximum conceivable range of values, 
> 0…99, so the compiler could generate better code as it now knows that 
> the expression x < 200 is false and let’s say that the assert is the 
> only source of information about the value range.

Yes, err.... if x < 100, then x is surely < 200? But I think that's just 
a typo. That's the kind of thing that asserts can do, even if the assert 
is not generated into code.

-Steve


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