https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120305
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to aneris from comment #0)
> auto triangularNums = std::ranges::views::iota(1lu, N + 1) |
> std::views::transform([](long unsigned a){return (a * (a + 1))/2;});
> return std::vector<long unsigned>{triangularNums.begin(),
> triangularNums.end()};
This is not a bug. The std::vector(InputIterator, InputIterator) constructor
requires arguments that meet the Cpp17InputIterator requirements.
ranges::iota_view iterators do not meet those requirements.
The correct way to do this is:
return std::ranges::to<std::vector<long unsigned>>(triangularNums);
You can also directly use the constructor that std::ranges::to uses:
return std::vector<long unsigned>{std::from_range, triangularNums);
The std::ranges::to solution works since GCC 14, the std::from_range
constructor is only supported since GCC 15.
