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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/106838] Built-in traits have wrong preconditions
Date: Mon, 05 Sep 2022 17:06:57 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106838

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
According to https://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html the
precondition for __is_trivial is:

"Requires: type shall be a complete type, (possibly cv-qualified) void, or =
an
array of unknown bound."

That implies the following should be valid:

struct Inc;
bool b =3D __is_trivial(Inc[]);

However, the implementation seems to match the requirement for the
std::is_trivial trait, which is:
"remove_all_extents_t<T> shall be a complete type or cv void."

This seems to be just a documentation bug.=