How to detect overflow

[Ali Çehreli via Digitalmars-d-learn]

On 11/03/2015 11:52 PM, Namal wrote:

>> http://dlang.org/phobos/core_checkedint.html
>
> It says:
>
>
> "The overflow is sticky, meaning a sequence of operations can be done
> and overflow need only be checked at the end."
>
> But how can I make multiple operations? I can only put 2 values in the
> function.

import core.checkedint;

void main() {
     bool overflowed;
     auto result = adds(int.max, 1, overflowed); // this overflows
     adds(1, 2, overflowed);     // this does not reset the flag

     assert(overflowed);
}

Ali