https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116755
--- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Zartaj Majeed from comment #9)
> Won't I have to separately add units to +d2.count()?
No, I'm saying that the operator<< for duration should use +d.count() instead
of d.count(), because that promotes signed char to int.
> I didn't think to try unsigned types because I'm working with system_clock
> that I believe requires signed Rep - but the following doesn't compile for me
>
> auto d3 = duration_cast<duration<make_unsigned_t<int64_t>>>(d1);
> println("d3 duration_cast unsigned value {}", d3);
>
> test.cpp:14:10: required from here
> 14 | println("d3 duration_cast unsigned value {}", d3);
> | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> /usr/include/c++/14/bits/chrono_io.h:1610:44: error: no matching function
> for call to ‘abs(const std::chrono::duration<long unsigned int>&)’
> 1610 | return _M_f._M_format(chrono::abs(__d), __fc, __d <
> __d.zero());
> | ~~~~~~~~~~~^~~~~
That was Bug 115668 and is already fixed. You're using a very outdated
development snapshot: 14.0.1 20240412
Please upgrade your compiler.
